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CHOOSING MATES WHO LOOK LIKE OURSELVES
Title
CHOOSING MATES WHO LOOK LIKE OURSELVES.
Creator
Gruber, Alyse, Donley, Amy, University of Central Florida
Abstract / Description
Some research suggests that the reason men and women choose mates who are physically similar to them, is because though they may be genetically similar (given the physical characteristics), the fact that there is no kinship allows for genetic stability. Some researchers believe this is a product of evolutionary forces, therefore allowing possible mates to find those whom they would see as compatible and fertile. Researchers have found that as children we imprint our parent's facial features,...
Show moreSome research suggests that the reason men and women choose mates who are physically similar to them, is because though they may be genetically similar (given the physical characteristics), the fact that there is no kinship allows for genetic stability. Some researchers believe this is a product of evolutionary forces, therefore allowing possible mates to find those whom they would see as compatible and fertile. Researchers have found that as children we imprint our parent's facial features, which helps develop the normal facial recognition later. With this knowledge it is suggested that we subconsciously use our parent's facial imprint as our standard for beauty when it comes to finding a mate. As children share a resemblance to their parents, it is not unlikely that as adults, men and women then choose mates who are physically similar to themselves. The current study examined whether men and women look for mates who are physically similar, even if they do not realize it. This study looked at a range of physical characteristics from hair color to height to body type. The wide range of physical characteristics allowed participants to be very specific about the ideal physical features they desire in a mate. It also allowed participants to be specific about their own physical characteristics. The survey was distributed through an online link that was distributed by upper and lower level sociology professors as well as social media sites. The results of this study are important because most research on heterosexual relationships focus on what characteristics each partner are looking to find. However, there is very little research on the phenomena of heterosexual partners choosing a mate who are physically similar.
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Date Issued
2014
Identifier
CFH0004602, ucf:45323
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFH0004602
PREFERRED HABITAT FOR LIQUIDITYIN INTERNATIONAL SHORT-TERM INTEREST RATES
Title
PREFERRED HABITAT FOR LIQUIDITYIN INTERNATIONAL SHORT-TERM INTEREST RATES.
Creator
Kotomin, Vladimir, Smith, Stanley, University of Central Florida
Abstract / Description
U.S. money market securities have been found to exhibit behavior consistent with preferred habitat for liquidity around year-ends (Griffiths and Winters (1997, 2004)). In particular, repurchase agreement and commercial paper yields tend to increase when the security begins to mature across the end of the year, and return to normal levels after the year-end obligations have been paid but before the calendar year-end. The competing hypothesis, window dressing by financial intermediaries around...
Show moreU.S. money market securities have been found to exhibit behavior consistent with preferred habitat for liquidity around year-ends (Griffiths and Winters (1997, 2004)). In particular, repurchase agreement and commercial paper yields tend to increase when the security begins to mature across the end of the year, and return to normal levels after the year-end obligations have been paid but before the calendar year-end. The competing hypothesis, window dressing by financial intermediaries around disclosure dates, requires that the increase in yields be sustained until after the turn of the year. This study is aimed at finding whether the behavior of international money markets around year-ends and quarter-ends is more consistent with preferred habitat for liquidity or window dressing. This is done by analyzing changes in LIBOR for different currencies around quarter-ends. A second part of the study considers the effect of preferred habitat on the term structure of short-term interest rates. The expectations hypothesis of the term structure posits that future expected interest rates are implied by the current term structure. Empirical research suggests that the expectations hypothesis often does not hold, especially at the short end of the term structure. Preferred habitat for liquidity in short-term rates may be one of the reasons for the failure of expectations. The same LIBOR data set is used to test for the expectations in the presence of preferred habitat for liquidity. The empirical results of this study suggest that preferred habitat for liquidity in the short-term rates around quarter-ends and year-ends is not responsible for the failure of the expectations hypothesis in the data.
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Date Issued
2005
Identifier
CFE0000583, ucf:46470
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0000583
MODELING THE INFLUENCES OF PERSONALITY PREFERENCES ON THE SELECTION OF INSTRUCTIONAL STRATEGIES ININTELLIGENT TUTORING SYSTEMS
Title
MODELING THE INFLUENCES OF PERSONALITY PREFERENCES ON THE SELECTION OF INSTRUCTIONAL STRATEGIES ININTELLIGENT TUTORING SYSTEMS.
Creator
Sottilare, Robert, Proctor, Michael, University of Central Florida
Abstract / Description
This thesis hypothesizes that a method for selecting instructional strategies (specifically media) based in part on a relationship between learning style preference and personality preference provides more relevant and understandable feedback to students and thereby higher learning effectiveness. This research investigates whether personality preferences are valid predictors of learning style preferences. Since learning style preferences are a key consideration in instructional strategies and...
Show moreThis thesis hypothesizes that a method for selecting instructional strategies (specifically media) based in part on a relationship between learning style preference and personality preference provides more relevant and understandable feedback to students and thereby higher learning effectiveness. This research investigates whether personality preferences are valid predictors of learning style preferences. Since learning style preferences are a key consideration in instructional strategies and instructional strategies are a key consideration in learning effectiveness, this thesis contributes to a greater understanding of the relationship between personality preferences and effective learning in intelligent tutoring systems (ITS). This research attempts to contribute to the goal of a "truly adaptive ITS" by first examining relationships between personality preferences and learning style preferences; and then by modeling the influences of personality on learning strategies to optimize feedback for each student. This thesis explores the general question "what can personality preferences contribute to learning in intelligent tutoring systems?" So, why is it important to evaluate the relationship between personality preferences and learning strategies in ITS? "While one-on-one human tutoring is still superior to ITS in general, this approach is idiosyncratic and not feasible to deliver to [any large population] in any cost-effective manner." (Loftin, 2004). Given the need for ITS in large, distributed populations (i.e. the United States Army), it is important to explore methods of increasing ITS performance and adaptability. Findings of this research include that the null hypothesis that "there is no dependency between personality preference variables and learning style preference variables" was partly rejected. Highly significant correlations between the personality preferences, openness and extraversion, were established for both the active-reflective and sensing-intuitive learning style preferences. Discussion of other relationships is provided.
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Date Issued
2006
Identifier
CFE0001403, ucf:47074
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0001403
THE PRICING AND PERFORMANCE OF CONVERTIBLE PREFERRED STOCK OFFERINGS FOLLOWING ISSUANCE
Title
THE PRICING AND PERFORMANCE OF CONVERTIBLE PREFERRED STOCK OFFERINGS FOLLOWING ISSUANCE.
Creator
Guzhva, Vitaly S., Ramanlal, Pradipkumar, University of Central Florida
Abstract / Description
This dissertation is a comprehensive study of convertible-preferred-stock pricing and performance following issuance. It is the first major academic study that identifies significant abnormal performance of corporate contingent claims following issuance.The research utilizes both option-based contingent claims valuation models and econometric techniques to investigate the sources of superior investment performance of convertible securities as an asset class that has persisted for the past...
Show moreThis dissertation is a comprehensive study of convertible-preferred-stock pricing and performance following issuance. It is the first major academic study that identifies significant abnormal performance of corporate contingent claims following issuance.The research utilizes both option-based contingent claims valuation models and econometric techniques to investigate the sources of superior investment performance of convertible securities as an asset class that has persisted for the past thirty years.Two main issues are examined: potential underpricing of convertible preferred stocks at issuance and their subsequent investment performance.Underpricing is examined based on a robust contingent-claims valuation model. Using two samples of convertible preferred stock offerings (24 issues, 12,051 observations and 69 issues, 28,831 observations respectively), the study provides evidence of statistically and economically significant underpricing at issuance that ranges from 2.9% to 1.4% and persists from the first day of convertible trading up to six months following issuance.Underpricing is invariant to convertible ratings and the exchange where the issues are traded. It is found, however, that, large and mid cap issues are more likely to be underpriced than small cap convertibles. Also, the offerings that are underwritten by non-reputable investment bankers are more likely to be underpriced than those underwritten by reputable investment bankers.Abnormal performance based on econometric techniques affirms underpricing at issuance. Statistically significant holding-period excess returns of convertibles over their underlying common stock returns range from 0.81% for the first week to 2.04% for the first five months following issuance. Excess returns are invariant to security ratings, exchange listing, firm size, underwriter reputation and the size of the issue. Further, panel data analysis of daily returns suggests excess returns of 1.1 percent (1.8 percent) for the first week (month) following issuance. Excess returns can be explained by increased sensitivity of convertible returns to the returns of their underlying common stocks in the first six months following issuance. Cross-sectional variations of this increased sensitivity indicates investment-grade issues, listed on NYSE/AMEX, by large firms, using reputable underwriters and for large issues are more sensitive to the underlying common stock in the first six month following issuance than securities with opposing characteristics. Underpricing at issuance is also indicated by investment models favored by convertible trading desks: about one dollar on an average price of thirty five during the first week following issuance with underpricing persisting up to 6 months following issuance. The excess returns cannot be attributed to liquidity, high betas of underlying stock or excess volatility of convertibles following issuance. Conversely, volatility analysis indicates risk-adjusted excess returns are likely to be higher than reported.
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Date Issued
2004
Identifier
CFE0000079, ucf:46091
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0000079
Investigating gender differences in student preferences for and achievement with educational games
Title
Investigating gender differences in student preferences for and achievement with educational games.
Creator
Regan, Damon, Hirumi, Atsusi, Atkinson, Thomas, Robinson, Edward, Witta, Eleanor, University of Central Florida
Abstract / Description
The purpose of this study was to investigate the choice behavior and achievement of male and female high school students who are given an option of taking a 36 week American History course in either a game-based format or a web-based format. It was hypothesized that (a) males would enroll more frequently in the game-based course than females, (b) there would be no significant difference in achievement between males and females in the game-based course or across course formats, and (c) there...
Show moreThe purpose of this study was to investigate the choice behavior and achievement of male and female high school students who are given an option of taking a 36 week American History course in either a game-based format or a web-based format. It was hypothesized that (a) males would enroll more frequently in the game-based course than females, (b) there would be no significant difference in achievement between males and females in the game-based course or across course formats, and (c) there would be no significant interaction between gender and the selection of course format.The study consisted of a sample of 7,962 11th grade students who enrolled in American History during the 2009/2010 school year at the Florida Virtual School (FLVS). Students planning to take 11th grade American History at FLVS were given the choice of enrolling in a game-based class format or a standard web-based online class format. A chi-square test of independence was used to analyze enrollment rates. An independent t test was used to analyze achievement based on gender in the game-based course. A two-way factorial analysis of variance (ANOVA) was used to analyze achievement data based on gender across course formats, enrollment, and the interaction of gender and enrollment.The chi-square results indicated that there is a relationship between gender and enrollment. Males chose to enroll in the game-based format of the course more frequently than females and females chose to enroll in the web-based format of the course more frequently than males. The independent t test results indicated that there is no significant difference in achievement based on gender in the game-based course. The ANOVA results indicated that there are significant differences in achievement based on gender as well as enrollment, but there are no significant differences in achievement based on the interaction of gender and enrollment. Implications for researchers, teachers, administrators, game developers, and funders are provided.
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Date Issued
2012
Identifier
CFE0004235, ucf:49519
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0004235
PREFERENCES FOR PERFORMANCE MEASURES: A STUDY OF A FEDERAL AGENCY
Title
PREFERENCES FOR PERFORMANCE MEASURES: A STUDY OF A FEDERAL AGENCY.
Creator
Beckles, Gina, Wang, XiaoHu, University of Central Florida
Abstract / Description
The purpose of this dissertation was to determine the preferences of clients of programs administered by selected federal agencies and the preferences of the federal managers who administer the programs in assessing performance measurement systems. Using the general progression of previous budgetary models used in the public sector, the researcher developed the Modified Balance Scorecard (MBSC), a performance measurement model designed specifically for use within the public sector. Surveys...
Show moreThe purpose of this dissertation was to determine the preferences of clients of programs administered by selected federal agencies and the preferences of the federal managers who administer the programs in assessing performance measurement systems. Using the general progression of previous budgetary models used in the public sector, the researcher developed the Modified Balance Scorecard (MBSC), a performance measurement model designed specifically for use within the public sector. Surveys based on the MBSC were administered to public managers and to clients of those managers in order to determine their preferences. The results showed that managers preferred public good measures and clients preferred financial measures. Both groups' second preferred index of measures was internal management process measures. This research is important in policy formulation and provides many implications regarding the effective presentation of policies. These results can be used to help craft policies for maximum effectiveness, based on the preferences of the respective groups.
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Date Issued
2006
Identifier
CFE0001091, ucf:46774
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0001091
TIME ESTIMATION AND HAND PREFERENCE
Title
TIME ESTIMATION AND HAND PREFERENCE.
Creator
Rodriguez, Maria, Hancock, Peter, University of Central Florida
Abstract / Description
This work examines the effect of participants' gender and handedness on the perception of short intervals of time. The time estimation task consisted of an empty production procedure with forty trials at each of four intervals of one, three, seven, and twenty seconds. The four target intervals represent a natural logarithmic progression and a series that bracket important temporal thresholds. The order of presentation of those intervals was randomized across participants but yoked across the...
Show moreThis work examines the effect of participants' gender and handedness on the perception of short intervals of time. The time estimation task consisted of an empty production procedure with forty trials at each of four intervals of one, three, seven, and twenty seconds. The four target intervals represent a natural logarithmic progression and a series that bracket important temporal thresholds. The order of presentation of those intervals was randomized across participants but yoked across the sexes in each of the respective dominant hand groups. The two between-subject factors, with two levels each, were sex and handedness. Participants produced forty estimates at each of the required intervals, which was the first within-subject factor, estimated interval being the other. T-tests were conducted on the dependent measures, the time estimates in terms of their variability and their central tendency with respect to the target duration. If handedness plays a significant role in timing, this may indicate differences between hemispheric functioning as a possible causal mechanism. If there is cerebral asymmetry in time perception, namely if one hemisphere is more competent regarding time perception, accuracy in judging duration should be higher for the contralateral hand. The results of the present study indicated that there are no significant differences in performance between right-handed and left-handed participants, or between male and female participants, in the estimation of short intervals of time.
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Date Issued
2005
Identifier
CFE0000768, ucf:46572
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0000768
THE RELATIONS AMONG CULTURAL VALUES, ETHNICITY, AND JOB CHOICE TRADE-OFF PREFERENCES
Title
THE RELATIONS AMONG CULTURAL VALUES, ETHNICITY, AND JOB CHOICE TRADE-OFF PREFERENCES.
Creator
Isenhour, Linda, Stone, Dianna, University of Central Florida
Abstract / Description
Researchers in human resource management (HRM) have long been concerned with the attraction and retention of organizational members (Breaugh, 1992; Rynes, 1991; Vroom, 1966). However, as the U.S. work force has become more diverse (U.S. Census Bureau, 2000), the need to consider how issues of cultural diversity are related to the recruitment process has become increasingly important. For example, although past research has investigated relations among individuals' values, personality, and...
Show moreResearchers in human resource management (HRM) have long been concerned with the attraction and retention of organizational members (Breaugh, 1992; Rynes, 1991; Vroom, 1966). However, as the U.S. work force has become more diverse (U.S. Census Bureau, 2000), the need to consider how issues of cultural diversity are related to the recruitment process has become increasingly important. For example, although past research has investigated relations among individuals' values, personality, and job choice preferences, no research has examined the job choice trade-off preferences of culturally diverse individuals. Moreover, researchers have not examined explicit job choice trade-off preferences involving job and organizational factors, even though expectancy theory-based models of recruitment implicitly suggest that individuals make trade-offs among valent job and organizational factors. Therefore, the purpose of the current research was to examine the relations among individuals' (a) cultural values (power distance, Protestant Ethic-earnings, Protestant Ethic-upward striving), (b) ethnicity (European-American, Hispanic-American), and (c) their job choice trade-off preferences for organizational prestige over pay using Thurstone's (1927, 1931) law of comparative judgment method. Study 1 served as a pilot of the procedure and measures. Based on the results of Study 1, changes were made to improve reliability of measures prior to Study 2. Study 2 tested hypothesized relations among cultural values, ethnicity, and job choice trade-off preferences for organizational prestige over pay. Results from Study 2 showed that power distance cultural values were related positively to job choice trade-off preferences for organizational prestige over pay and that Protestant Ethic-earnings cultural values were related negatively to job choice trade-off preferences for organizational prestige over pay. In addition, Hispanic-Americans were more likely than European-Americans to prefer job choice trade-offs for organizational prestige over pay. However, Protestant Ethic-upward striving cultural values were unrelated to job choice trade-off preferences for organizational prestige over pay. Moreover, ethnicity was unrelated to power distance cultural values, Protestant Ethic-earning cultural values, or Protestant Ethic-upward striving cultural values. Study results suggest that including cultural values and ethnicity in future recruitment research can enhance the understanding of individuals' job choice preferences and provide practitioners with information to attract multicultural job applicants.
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Date Issued
2006
Identifier
CFE0001194, ucf:46858
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0001194
THE SOUND OF POLITICS: AN EXAMINATION OF POLITICAL ORIENTATIONS AND MUSICAL PREFERENCES AMONG COLLEGE AGED ADULTS
Title
THE SOUND OF POLITICS: AN EXAMINATION OF POLITICAL ORIENTATIONS AND MUSICAL PREFERENCES AMONG COLLEGE AGED ADULTS.
Creator
Stringer, Omari, Wright, Chrysalis, University of Central Florida
Abstract / Description
Music fits in a larger media culture that can influence the thoughts and beliefs of many people. Specifically, there is an interest in the relationship between music and any influences it may have on political views or orientations. Based on the existing literature, it is hypothesized that there will be a significant correlation between political orientations and involvement in music and political orientations with music genre preferences. It is also hypothesized that there will be a...
Show moreMusic fits in a larger media culture that can influence the thoughts and beliefs of many people. Specifically, there is an interest in the relationship between music and any influences it may have on political views or orientations. Based on the existing literature, it is hypothesized that there will be a significant correlation between political orientations and involvement in music and political orientations with music genre preferences. It is also hypothesized that there will be a relationship between socioeconomic status and music preferences. Furthermore, it is expected that participants will report a high level of music involvement, considering how accessible music is to many students (Agbo-Quaye & Robertson, 2010; RIAA, 2016). Results indicate that there is a correlation between political orientation and several genres, in addition to demographic variables. Participants reported a high level of music involvement and high usage of music streaming services. Additional analysis indicates that two of the top five genres participants listened to (alternative and religious music) can be a significant predictor of political orientation.
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Date Issued
2017
Identifier
CFH2000159, ucf:53149
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFH2000159
A CULTURAL CONTINGENCY LEADERSHIP MODEL FOR A MULTINATIONAL HIGHER EDUCATION JOINT VENTURE
Title
A CULTURAL CONTINGENCY LEADERSHIP MODEL FOR A MULTINATIONAL HIGHER EDUCATION JOINT VENTURE.
Creator
Albritton, Frankie, House, Jess, University of Central Florida
Abstract / Description
This dissertation addressed the need for empirical research on the leadership of multinational virtual teams (Davis & Bryant, 2003; Early & Gibson, 2002; Ilgen, Lepine, and Hollenbeck, 1997; Prieto & Arias, 1997), particularly in the field of educational leadership (Cheng, 1995). This was accomplished through the development of a model based upon the cultural values discovered through the use of Hofstede's (1980, 2001) Values Survey Module 94 (VSM 94). As workers will bring values from...
Show moreThis dissertation addressed the need for empirical research on the leadership of multinational virtual teams (Davis & Bryant, 2003; Early & Gibson, 2002; Ilgen, Lepine, and Hollenbeck, 1997; Prieto & Arias, 1997), particularly in the field of educational leadership (Cheng, 1995). This was accomplished through the development of a model based upon the cultural values discovered through the use of Hofstede's (1980, 2001) Values Survey Module 94 (VSM 94). As workers will bring values from their own cultures to the multinational workplace (Bochner & Hesketh, 1994), research was conducted to determine the cultural values of economics professors in the United States and Germany in order to formulate a cultural contingent leadership model based on Triandis' (1993) adaptation of Fiedler's (1967) contingency theory. Given a total response from 194 U.S. and German economics professors, it was discovered that faculty in both the United States and Germany had values that differed significantly from those that Hofstede discovered for his IBM employee samples in four out of five dimensions. However, it was found that the values for the U.S. and German faculties were a close replication of Hoppe's (1990) findings which were based on a sample that was similar to the economics faculties in both occupation and education. These findings add a cautionary note to the recommendation by Hofstede and Peterson (2000) that existing cultural values can be used by cultural researchers: Previous cultural value data can be used if the samples are closely matched to the previous samples in both nationality as well as educational and occupational background. The research thus indicated that differences in national culture, as measured by Hofstede's (1980, 2001) cultural dimensions, still exist. In addition, a direct comparison of the cultural values between the two faculties indicated that the U.S. and German economics faculties differed significantly in two of Hofstede's cultural dimensions, individualism and collectivism and masculinity and femininity. The two samples were not significantly different in the cultural dimensions of power distance, uncertainty avoidance, and long term orientation. Using the Triandis (1993) approach, application of the research results to Fiedler's (1967) LPC model indicated that a relationship oriented leader would be an in-match leader for a group of U.S. and German higher education economics faculty. This result was contingent upon the cultural values discovered for the U.S. and German faculties who would be involved in an endeavor with situational variables similar to that which would be found in an international joint venture to offer online distance economics education to students in a developing country.
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Date Issued
2007
Identifier
CFE0001547, ucf:47143
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0001547
A Survey of Investing and Retirement Knowledge and Preferences of Florida Preservice Teachers
Title
A Survey of Investing and Retirement Knowledge and Preferences of Florida Preservice Teachers.
Creator
Thripp, Richard, Hartshorne, Richard, Hahs-Vaughn, Debbie, Hoffman, Bobby, Jahani, Shiva, Mottola, Gary, University of Central Florida
Abstract / Description
New teachers are facing lower pay and less generous retirement benefits than the prior generation, yet their financial and retirement knowledge, concerns, and preferences have received little attention. To investigate these areas, the author developed a 39-item survey instrument and administered it to 314 preservice teachers in undergraduate teacher education courses at the University of Central Florida, who were primarily female elementary and early childhood education juniors and seniors...
Show moreNew teachers are facing lower pay and less generous retirement benefits than the prior generation, yet their financial and retirement knowledge, concerns, and preferences have received little attention. To investigate these areas, the author developed a 39-item survey instrument and administered it to 314 preservice teachers in undergraduate teacher education courses at the University of Central Florida, who were primarily female elementary and early childhood education juniors and seniors ages 18(-)25. Florida public employees are offered an unusual choice between a traditional pension plan and a defined-contribution plan similar to a 401(k) in which they can select their own investments, and 54% of surveyed preservice teachers preferred the 401(k)-like plan structure. However, their preferences may be ill-advised, given that in a mock portfolio allocation exercise intended to assess retirement investing sophistication, preservice teachers directed more than half their retirement money to low-risk money market and bond funds, which will likely underperform stocks over several decades. Furthermore, they anticipated that low salaries will impede their ability to save for retirement. For comparison, the survey was also administered to 205 U.S. college students or graduates ages 18(-)25 on the Amazon Mechanical Turk platform for $1.00 each. Worrisomely, preservice teachers had significantly lower financial knowledge and retirement investing sophistication. These findings suggest a need for financial education targeting Florida preservice teachers, particularly given that the Florida Retirement System substantially cut its benefits in 2011.
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Date Issued
2019
Identifier
CFE0007868, ucf:52793
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0007868
Investigating the relationships between preferences, gender, and high school students' geometry performance
Title
Investigating the relationships between preferences, gender, and high school students' geometry performance.
Creator
Mainali, Bhesh, Haciomeroglu, Erhan, Dixon, Juli, Andreasen, Janet, Bai, Haiyan, University of Central Florida
Abstract / Description
In this quantitative study, the relationships between high school students' preference for solution methods, geometry performance, task difficulty, and gender were investigated. The data was collected from 161 high school students from six different schools at a county located in central Florida in the United States. The study was conducted during the 2013(-)2014 school year. The participants represented a wide range in socioeconomic status, were from a range of grades (10-12), and were...
Show moreIn this quantitative study, the relationships between high school students' preference for solution methods, geometry performance, task difficulty, and gender were investigated. The data was collected from 161 high school students from six different schools at a county located in central Florida in the United States. The study was conducted during the 2013(-)2014 school year. The participants represented a wide range in socioeconomic status, were from a range of grades (10-12), and were enrolled in different mathematics courses (Algebra 2, Geometry, Financial Algebra, and Pre-calculus). Data were collected primarily with the aid of a geometry test and a geometry questionnaire. Using a think-aloud protocol, a short interview was also conducted with some students.For the purpose of statistical analysis, students' preferences for solution methods were quantified into numeric values, and then a visuality score was obtained for each student. Students' visuality scores ranged from -12 to +12. The visuality scores were used to assess students' preference for solution methods. A standardized test score was used to measure students' geometry performance. The data analysis indicated that the majority of students were visualizers. The statistical analysis revealed that there was not an association between preference for solution methods and students' geometry performance. The preference for solving geometry problems using either visual or nonvisual methods was not influenced by task difficulty. Students were equally likely to employ visual as well as nonvisual solution methods regardless of the task difficulty. Gender was significant in geometry performance but not in preference for solution methods. Female students' geometry performance was significantly higher than male students' geometry performance. The findings of this study suggested that instruction should be focused on incorporating both visual and nonvisual teaching strategies in mathematics lesson activities in order to develop preference for both visual and nonvisual solution methods.
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Date Issued
2014
Identifier
CFE0005374, ucf:50448
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0005374
SEASONAL AND DIEL PATTERNS OF MANATEE HABITAT USE
Title
SEASONAL AND DIEL PATTERNS OF MANATEE HABITAT USE.
Creator
Ross, Monica, Weishampel, John, University of Central Florida
Abstract / Description
State and Federal agencies have created sanctuaries and speed zones to help reduce manatee mortality while incorporating the recreational and commercial resource needs of these same habitats for humans. Specific habitat resources are considered necessary to increase manatee survivorship. We have only recently begun to address how manatees use some of these resources based on physiological or reproductive strategies. In this study, I quantified patterns of habitat use during seasonal and diel...
Show moreState and Federal agencies have created sanctuaries and speed zones to help reduce manatee mortality while incorporating the recreational and commercial resource needs of these same habitats for humans. Specific habitat resources are considered necessary to increase manatee survivorship. We have only recently begun to address how manatees use some of these resources based on physiological or reproductive strategies. In this study, I quantified patterns of habitat use during seasonal and diel periods for different sex and reproductive manatee classes using data from a radio-telemetry study conducted by the Florida Fish and Wildlife Conservation Commission during 1991-1996. I used five environmental geographic data layers: bathymetry, distance to seagrass, distance to shoreline, distance to warm water refuge sites, and distance to fresh water sources, to discriminate seasonal and diel habitat use patterns for different manatee classes: males (M), females with calves (FWC), and females without calves (FNC). Mean occupancy values were calculated for environmental variable locations and seasonal, diel, and manatee class differences were tested using a Multi-Response Permutation Procedure (MRPP). Nonmetric Multidimensional Scaling (NMS) was used to visualize the ordination patterns of the manatee classes and to assess importance of correlated environmental variables. Significant differences in habitat use were noted between summer and winter based on distances to warm water, seagrass, and fresh water sources but similar habitat use patterns were exhibited within summer diel periods among manatee classes. All manatee classes appeared to have used a higher proportion of locations closer in proximity to seagrass at night than day in winter indicating a disproportionate difference in feeding bouts between diel periods. These differences may be attributed to adjusting feeding strategies to reduce thermoregulatory costs or to decrease human interactions. Differences in patterns were exhibited for the winter diel periods specifically for the FWC manatee classes during winter days. FWC had a higher proportion of locations within the warm water refuges during the day indicating a possible trade off situation between food consumption and thermal exposure. This study demonstrates coarse and fine scale patterns of variation in habitat use for manatees both seasonally and daily within winter. It also suggests that during winter months, manatees were not just utilizing their habitat but they appeared to have preferences and selection for certain habitat types. Recovery of a species is greatly enhanced when patterns of habitat use within the species' environment has been clearly defined. Understanding more specifically what types of habitats manatees choose might allow management to adjust strategies for protection of key habitats while encouraging further recovery of this species.
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Date Issued
2007
Identifier
CFE0001896, ucf:47408
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0001896
IMPROVING AIRLINE SCHEDULE RELIABILITY USING A STRATEGIC MULTI-OBJECTIVE RUNWAY SLOT ASSIGNMENT SEARCH HEURISTIC
Title
IMPROVING AIRLINE SCHEDULE RELIABILITY USING A STRATEGIC MULTI-OBJECTIVE RUNWAY SLOT ASSIGNMENT SEARCH HEURISTIC.
Creator
Hafner, Florian, Sepulveda, Alejandro, University of Central Florida
Abstract / Description
Improving the predictability of airline schedules in the National Airspace System (NAS) has been a constant endeavor, particularly as system delays grow with ever-increasing demand. Airline schedules need to be resistant to perturbations in the system including Ground Delay Programs (GDPs) and inclement weather. The strategic search heuristic proposed in this dissertation significantly improves airline schedule reliability by assigning airport departure and arrival slots to each flight in the...
Show moreImproving the predictability of airline schedules in the National Airspace System (NAS) has been a constant endeavor, particularly as system delays grow with ever-increasing demand. Airline schedules need to be resistant to perturbations in the system including Ground Delay Programs (GDPs) and inclement weather. The strategic search heuristic proposed in this dissertation significantly improves airline schedule reliability by assigning airport departure and arrival slots to each flight in the schedule across a network of airports. This is performed using a multi-objective optimization approach that is primarily based on historical flight and taxi times but also includes certain airline, airport, and FAA priorities. The intent of this algorithm is to produce a more reliable, robust schedule that operates in today's environment as well as tomorrow's 4-Dimensional Trajectory Controlled system as described the FAA's Next Generation ATM system (NextGen). This novel airline schedule optimization approach is implemented using a multi-objective evolutionary algorithm which is capable of incorporating limited airport capacities. The core of the fitness function is an extensive database of historic operating times for flight and ground operations collected over a two year period based on ASDI and BTS data. Empirical distributions based on this data reflect the probability that flights encounter various flight and taxi times. The fitness function also adds the ability to define priorities for certain flights based on aircraft size, flight time, and airline usage. The algorithm is applied to airline schedules for two primary US airports: Chicago O'Hare and Atlanta Hartsfield-Jackson. The effects of this multi-objective schedule optimization are evaluated in a variety of scenarios including periods of high, medium, and low demand. The schedules generated by the optimization algorithm were evaluated using a simple queuing simulation model implemented in AnyLogic. The scenarios were simulated in AnyLogic using two basic setups: (1) using modes of flight and taxi times that reflect highly predictable 4-Dimensional Trajectory Control operations and (2) using full distributions of flight and taxi times reflecting current day operations. The simulation analysis showed significant improvements in reliability as measured by the mean square difference (MSD) of filed versus simulated flight arrival and departure times. Arrivals showed the most consistent improvements of up to 80% in on-time performance (OTP). Departures showed reduced overall improvements, particularly when the optimization was performed without the consideration of airport capacity. The 4-Dimensional Trajectory Control environment more than doubled the on-time performance of departures over the current day, more chaotic scenarios. This research shows that airline schedule reliability can be significantly improved over a network of airports using historical flight and taxi time data. It also provides for a mechanism to prioritize flights based on various airline, airport, and ATC goals. The algorithm is shown to work in today's environment as well as tomorrow's NextGen 4-Dimensional Trajectory Control setup.
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Date Issued
2008
Identifier
CFE0002067, ucf:47572
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0002067
RELATIONSHIP BETWEEN ADOLESCENT BEHAVIOR AND CIVIC ENGAGEMENT
Title
RELATIONSHIP BETWEEN ADOLESCENT BEHAVIOR AND CIVIC ENGAGEMENT.
Creator
Ernst, Michael, Murray, Barbara, University of Central Florida
Abstract / Description
Citizenship – commitment to and participation in a political community - is the heart of constitutional democracy and a free society. Knowledge of the rights, responsibilities, and privileges are the electrical impulses that keep a steady beat. Without the participation of educated citizens, a democratic republic can not and does not function. This study analyzed the relationship between adolescent behavior and civic engagement. This task was accomplished by examining the amount of civic...
Show moreCitizenship – commitment to and participation in a political community - is the heart of constitutional democracy and a free society. Knowledge of the rights, responsibilities, and privileges are the electrical impulses that keep a steady beat. Without the participation of educated citizens, a democratic republic can not and does not function. This study analyzed the relationship between adolescent behavior and civic engagement. This task was accomplished by examining the amount of civic knowledge possessed by two groups within a population. The population examined, a high school in Flagler County, was composed of "at risk" students (those who had an Individualized Education Plan) and "regular" students (those that did not). The study uncovered the message that the amount of civic knowledge possessed by American youth was not as important as it was for them to be engaged in extracurricular activities. During the course of time, educators appear to have restricted their own ability to plan for and provide learning experiences that take in to consideration the physical characteristics; physical needs; patterns of growth and maturation; physiological changes; intellectual development; intellectual characteristics; learning preferences and styles; emotional development; personality development; and social development of each and every young adolescent attending school. When interesting, affordable activities are not made available, students become bored and get in to trouble during after school hours. Adolescent behaviors such as moral judgment and risk taking (or lack thereof) affect their decision to become civically involved.
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Date Issued
2005
Identifier
CFE0000764, ucf:46585
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0000764
Infectious Disease Risks in Developing Countries: A Non-Market Valuation Exercise
Title
Infectious Disease Risks in Developing Countries: A Non-Market Valuation Exercise.
Creator
Samajpati, Shreejata, Gerking, Shelby, Dickie, Mark, Caputo, Michael, Roy, Joyashree, University of Central Florida
Abstract / Description
This dissertation focuses on the non-market valuation of health-risks of malaria, an infectious disease that imposes a substantive public health burden across the globe, hitting particularly hard the tropical developing nations of Africa and Asia. The United Nations Millennium Development Goals include malaria control as a priority and large investments are underway to promote effective prevention and treatment. Despite such concerted supply-side efforts, malaria-related mortality and...
Show moreThis dissertation focuses on the non-market valuation of health-risks of malaria, an infectious disease that imposes a substantive public health burden across the globe, hitting particularly hard the tropical developing nations of Africa and Asia. The United Nations Millennium Development Goals include malaria control as a priority and large investments are underway to promote effective prevention and treatment. Despite such concerted supply-side efforts, malaria-related mortality and morbidity still abound due to a complex interface of factors like climate-change, poverty, inadequate control behavior, infection and prevention externalities, parasite resistance etc. This research project digs into the demand-side of the health problem, considers the "externality" dimension to prevention, and primarily asks the question: how do individuals in developing countries view competing disease-control (prevention) measures, viz. a publicly-administered community-level malaria control measure as against private preventive choices. A theoretical model is developed to help explore the public-private interplay of health risks of malaria. The malaria-endemic regions of Kolkata (India) and its rural fringes comprise the site for an empirical investigation. A field survey (Malaria Risk and Prevention Survey, October-December, 2011) incorporating a mix of stated and revealed preference techniques of health valuation is implemented. Risk-perceptions of respondents are elicited using a measurable visual-aid and individuals' perceived valuations of health-risk reductions, randomly offered with the public and private health treatments, are empirically ascertained. Using a Likelihood Ratio Test on the structural risk parameters, it is seen that individuals' valuations of health risk reductions are the same across the private and public treatments. The comparative valuation exercise, thus, corroborates the externality dimension to malaria control, calling for greater public action to combat malaria. The viability of such a scaled-up public malaria program, in the context of Kolkata, is discussed by comparing the public treatment willingness to pay estimates with the annual estimated costs that the Kolkata Municipal Corporation, the civic body in the city of Kolkata, maintains on account of vector control. Results from the comparative valuation exercises also support the idea that private prevention is generally responsive to prevention costs, indicating the importance of price incentives to induce greater prevention. The issues of health valuation and price sensitivity are further explored across various split-samples differentiated on the basis of socio-economic attributes, disease exposure, actual prevention efforts and perceived malaria risks of survey respondents. Such auxiliary exercises help analyze the valuation question in greater depth, and generate policy insights into the potential factors that shape private prevention behavior.
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Date Issued
2012
Identifier
CFE0004594, ucf:49195
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0004594
Farm to Fork: A Culinary- and Farm-Enhanced Nutrition Education Program
Title
Farm to Fork: A Culinary- and Farm-Enhanced Nutrition Education Program.
Creator
Ray, Vivian, Hopp, Carolyn, Lue, Martha, Stout, Jeffrey, Thomas, Lionel, University of Central Florida
Abstract / Description
With obesity in adolescents becoming a major health problem in the United States, there has been an expansion in the use of nutritional education programs as intervention. Effective nutrition education can decrease the incidence of obesity and other diet-related chronic diseases, type-2 diabetes, cardiovascular disease, and hypertension. This dissertation in practice proposes to design a nutrition education program, integrating farm and culinary activities into a nutrition education...
Show moreWith obesity in adolescents becoming a major health problem in the United States, there has been an expansion in the use of nutritional education programs as intervention. Effective nutrition education can decrease the incidence of obesity and other diet-related chronic diseases, type-2 diabetes, cardiovascular disease, and hypertension. This dissertation in practice proposes to design a nutrition education program, integrating farm and culinary activities into a nutrition education curriculum. The program is designed as a stand-alone program, but for this practice, implementation integrates the nutrition education program into the Film @ 6 after-school program (-) a STEM-focused program designed to assist sixth graders in their first year of middle school (-) at Southeast Middle School in Salisbury, Rowan County, North Carolina (NC). This experiential nutrition education program will provide instruction and activities in order to increase nutritional knowledge, improve culinary techniques, and increase consumption of fruits, vegetables, and minimally processed foods of sixth grade students as a means to address the overweight and obesity risks of middle school children. Children and adolescents are considered the priority population for intervention strategies because 70% of obese adolescents become obese adults and it is difficult to reduce excessive weight once established (Dehghan, Akhtar-Danesh, (&) Merchant, 2005).
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Date Issued
2015
Identifier
CFE0005871, ucf:50866
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0005871
Habitat selection in transformed landscapes and the role of novel ecosystems for native species persistence
Title
Habitat selection in transformed landscapes and the role of novel ecosystems for native species persistence.
Creator
Sanchez Clavijo, Lina, Quintana-Ascencio, Pedro, Noss, Reed, Weishampel, John, Rodewald, Amanda, University of Central Florida
Abstract / Description
To understand native species persistence in transformed landscapes we must evaluate how individual behaviors interact with landscape structure through ecological processes such as habitat selection. Rapid, widespread landscape transformation may lead to a mismatch between habitat preference and quality, a phenomenon known as ecological traps that can have negative outcomes for populations. I applied this framework to the study of birds inhabiting landscapes dominated by forest remnants and...
Show moreTo understand native species persistence in transformed landscapes we must evaluate how individual behaviors interact with landscape structure through ecological processes such as habitat selection. Rapid, widespread landscape transformation may lead to a mismatch between habitat preference and quality, a phenomenon known as ecological traps that can have negative outcomes for populations. I applied this framework to the study of birds inhabiting landscapes dominated by forest remnants and shade coffee plantations, a tropical agroforestry system that retains important portions of native biodiversity. I used two different approaches to answer the question: What is the role of habitat selection in the adaptation of native species to transformed landscapes? First, I present the results of a simulation model used to evaluate the effects of landscape structure on population dynamics of a hypothetical species under two mechanisms of habitat selection. Then I present the analyses of seven years of capture-mark-recapture and resight data collected to compare habitat preference and quality between shade coffee and forest for twelve resident bird species in the Sierra Nevada de Santa Marta (Colombia). I provide evidence for the importance of including the landscape context in the evaluation of ecological traps and for using long-term demographic data when evaluating the potential of novel ecosystems and intermediately-modified habitats for biodiversity conservation. Beyond suggestions to improve bird conservation in shade coffee, my findings contribute to theory about ecological traps and can be applied to understand population processes in a wide variety of heterogeneous landscapes.
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Date Issued
2016
Identifier
CFE0006494, ucf:51392
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0006494
Discovering Latent Gender Bias in Children's STEM Literature
Title
Discovering Latent Gender Bias in Children's STEM Literature.
Creator
Herlihy, Christine, Campbell, Laurie, Butler, Malcolm, Gunter, Glenda, Grauerholz, Liz, University of Central Florida
Abstract / Description
A mixed method, exploratory, sequential research design was conducted to investigate the presence of latent bias in early childhood STEM literature content, applying a non-biased, sociocultural, STEM identity, theoretical framework. A survey of children's perceptions of gender and a content analysis found unintentional bias. Exploratory findings confirmed 102 children were gendering images. An examination of the relationship between the participants' gender and how the participant gendered...
Show moreA mixed method, exploratory, sequential research design was conducted to investigate the presence of latent bias in early childhood STEM literature content, applying a non-biased, sociocultural, STEM identity, theoretical framework. A survey of children's perceptions of gender and a content analysis found unintentional bias. Exploratory findings confirmed 102 children were gendering images. An examination of the relationship between the participants' gender and how the participant gendered AND preferred the images indicated differences existed between boys and girls. Children preferred images perceived as matching their own, with statistical significance. Girls were found to prefer images less than boys AND they were more likely to gender the images. Children were more likely to give gender to the 50 images considered in the study, than to non-gender them. The gendering and preference was found to be statistically significantly higher for anthropomorphic and personified inanimate images. Additionally, a content analysis of eight award winning and popular selling STEM children's books were conducted and were found to contain biased narratives and image content. A content analysis found significant differences relating to the frequency of character representation in the eight books. Analysis indicated a higher lexical representation of females to males, and image representation was more male than female. Further analysis of additional books and images is warranted from the findings of this exploratory study.
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Date Issued
2019
Identifier
CFE0007890, ucf:52797
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0007890
THE RELATIONSHIP BETWEEN GENRE CHOICE OF MUSIC AND ALTRUISTIC BEHAVIOR
Title
THE RELATIONSHIP BETWEEN GENRE CHOICE OF MUSIC AND ALTRUISTIC BEHAVIOR.
Creator
Hippler, Christine, Whitten, Shannon, University of Central Florida
Abstract / Description
ABSTRACT Extensive research has documented the relationship between listening to certain genres of music and negative effects on social behavior such as aggressive and antisocial behavior. The present study explored whether there are genres of music associated with altruism. Altruistic behavior is defined as behavior that is consistently more caring, helpful, considerate of other's feelings, and self- sacrificing. These behaviors promote our ability to thrive as a community. Yet, few studies...
Show moreABSTRACT Extensive research has documented the relationship between listening to certain genres of music and negative effects on social behavior such as aggressive and antisocial behavior. The present study explored whether there are genres of music associated with altruism. Altruistic behavior is defined as behavior that is consistently more caring, helpful, considerate of other's feelings, and self- sacrificing. These behaviors promote our ability to thrive as a community. Yet, few studies have addressed the relationship between music and altruism. Data was collected from 608 college students who completed a self-report altruism scale, music preference measure, the Marlowe Crowne social desirability scale, and a demographic information form in order to see if there is a relationship between choice of music and altruism. A multiple hierarchal regression analysis found music genre choice accounted for 15.9 percent of variance in self-reported altruism. Significant, positive correlations emerged also between altruism and several music genres including alternative, country, classical, and emo.
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Date Issued
2011
Identifier
CFH0003820, ucf:44753
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFH0003820