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- Title
- Predicting Counterproductive Work Behavior with Explicit and Implicit Measures of Conscientiousness, Agreeableness, and Emotional Stability.
- Creator
-
Zheng, Jimmy, Shoss, Mindy, Jex, Steve, Ehrhart, Mark, University of Central Florida
- Abstract / Description
-
The current study leveraged the stressor-emotion model of CWB, the reflective-impulsive model of behavior, and theories of explicit and implicit personality to investigate the roles explicit and implicit aspects of personality, and work stressors have in influencing CWB. The stressor-emotion and reflective-impulsive models suggest that in addition to reflective (i.e., explicit) processes, impulsive (i.e., implicit) processes may also influence CWB because the act can be motivated by negative...
Show moreThe current study leveraged the stressor-emotion model of CWB, the reflective-impulsive model of behavior, and theories of explicit and implicit personality to investigate the roles explicit and implicit aspects of personality, and work stressors have in influencing CWB. The stressor-emotion and reflective-impulsive models suggest that in addition to reflective (i.e., explicit) processes, impulsive (i.e., implicit) processes may also influence CWB because the act can be motivated by negative emotions induced by frustrating working conditions. Theories of personality and motivation suggest that conscientiousness, agreeableness, and emotional stability predict CWB because these traits motivate people to pursue goals that reduce or increase acts of CWB. Explicit and implicit theories of personality suggest that explicit aspects of personality should predict CWB driven by explicit processes, whereas implicit aspects of personality should predict CWB driven by implicit processes. These ideas were tested by examining explicit and implicit conscientiousness, agreeableness, and emotional stability as predictors of CWB, by examining implicit personality's incremental prediction of CWB over explicit personality, and by examining the interactions between implicit personality and work stressors as predictors of CWB. A series of hierarchical regression analyses were conducted using online survey data from 194 participants. The results of this study suggest that CWBs can be influenced by both explicit and implicit aspects of personality; however, in contrast to explicit personality, implicit personality is most likely to influence CWB when individuals experience a high level of work stressors.
Show less - Date Issued
- 2019
- Identifier
- CFE0007560, ucf:52614
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007560
- Title
- Understanding Phonological Memory Deficits in Boys with Attention-deficit/Hyperactivity Disorder (ADHD): Dissociation of Short-Term Storage and Articulatory Rehearsal Processes.
- Creator
-
Bolden, Jennifer, Rapport, Mark, Beidel, Deborah, Sims, Valerie, University of Central Florida
- Abstract / Description
-
current study dissociated and examined the two primary components of the phonological working memory subsystem (-) the short-term store and articulatory rehearsal mechanism (-) in boys with ADHD (n = 18) relative to typically developing boys (n = 15). Word lists of increasing length (2, 4, and 6 words per trial) were presented to and recalled by children following a brief (3 s) interval to assess their phonological short-term storage capacity. Children's ability to utilize the articulatory...
Show morecurrent study dissociated and examined the two primary components of the phonological working memory subsystem (-) the short-term store and articulatory rehearsal mechanism (-) in boys with ADHD (n = 18) relative to typically developing boys (n = 15). Word lists of increasing length (2, 4, and 6 words per trial) were presented to and recalled by children following a brief (3 s) interval to assess their phonological short-term storage capacity. Children's ability to utilize the articulatory rehearsal mechanism to actively maintain information in the phonological short-term store was assessed using word lists at their established memory span but with extended rehearsal times (12 s and 21 s delays). Results indicate that both phonological short-term storage capacity and articulatory rehearsal are impaired or underdeveloped to a significant extent in boys with ADHD relative to typically developing boys, even after controlling for age, SES, IQ, reading ability, and reading speed. Larger magnitude deficits, however, were apparent in short-term storage capacity (ES = 1.15 to 1.98) relative to articulatory rehearsal (ES = 0.47 to 1.02). These findings are consistent with previous reports of deficient phonological short-term memory in boys with ADHD, and suggest that future attempts to develop remedial cognitive interventions for children with ADHD will need to include active components that require children to hold increasingly more information over longer time intervals.
Show less - Date Issued
- 2012
- Identifier
- CFE0004359, ucf:49432
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004359
- Title
- ADHD AND WORKING MEMORY: THE IMPACT OF CENTRAL EXECUTIVE DEFICITS AND OVERWHELMING STORAGE/REHEARSAL CAPACITY ON OBSERVED INATTENTIVE BEHAVIOR.
- Creator
-
Kofler, Michael, Rapport, Mark, University of Central Florida
- Abstract / Description
-
Inattentive behavior is considered a core and pervasive feature of ADHD; however, an alternative model challenges this premise and hypothesizes a functional relationship between working memory and inattentive behavior. The current study investigated whether inattentive behavior in children with ADHD is functionally related to domain-general central executive and/or subsidiary storage/rehearsal components of working memory. Objective observations of children's attentive behavior by...
Show moreInattentive behavior is considered a core and pervasive feature of ADHD; however, an alternative model challenges this premise and hypothesizes a functional relationship between working memory and inattentive behavior. The current study investigated whether inattentive behavior in children with ADHD is functionally related to domain-general central executive and/or subsidiary storage/rehearsal components of working memory. Objective observations of children's attentive behavior by independent observers were conducted while children with ADHD (n=15) and typically developing children (n=14) completed 10 counterbalanced tasks that differentially manipulated central executive, phonological storage/rehearsal, and visuospatial storage/rehearsal demands. Results of latent variable and effect size confidence interval analyses revealed two conditions that completely accounted for the attentive behavior deficits in children with ADHD: (a) placing demands on central executive processing, the effect of which is evident under even low cognitive loads, and (b) overwhelming storage/rehearsal capacity, which has similar effects on children with ADHD and typically developing children but occurs at lower cognitive loads for children with ADHD. Collectively, the results challenge the current DSM-IV conceptualization of ADHD and indicate that inattentive behavior may be secondary to underlying working memory deficits.
Show less - Date Issued
- 2009
- Identifier
- CFE0002695, ucf:48201
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002695
- Title
- THE MEDIATING ROLE OF MOTIVATION AND JOB SATISFACTION IN WORK ENVIRONMENT-OUTCOME RELATIONSHIPS.
- Creator
-
Guzman, Melissa, Pritchard, Robert, University of Central Florida
- Abstract / Description
-
Research that links various aspects of the work environment to important work outcomes can be traced back almost seventy years. Despite the history and proliferation of these studies, firm conclusions have not been reached regarding the ways through which the work environment impacts these outcomes. For example, mediating variables such as motivation and job satisfaction have been proposed as affective and cognitive states that could impact the environment-outcome relationships but have...
Show moreResearch that links various aspects of the work environment to important work outcomes can be traced back almost seventy years. Despite the history and proliferation of these studies, firm conclusions have not been reached regarding the ways through which the work environment impacts these outcomes. For example, mediating variables such as motivation and job satisfaction have been proposed as affective and cognitive states that could impact the environment-outcome relationships but have received little attention. Additionally, organizational and contextual moderators such as group size and demographics that could impact the relationships have been called for but have yet to be studied. Consequently, much remains to be examined in the environment-outcome relationships beyond the basic links. Therefore, the primary objective of the current study was to investigate the effects of motivation and job satisfaction as mediators, and group size, group tenure, and group gender composition as moderators, of work environment-work outcome relationships. Specifically, it was proposed that motivation and job satisfaction mediate the relationships between the feedback environment, learning environment, and reward and recognition environment and job performance and turnover intentions. Finally, it was expected that group size, group tenure, and group gender composition moderate these same environment-outcome relationships. It is suggested that findings gleaned from this study can provide a clearer picture of how certain work environment variables impact specific work outcomes, which can provide researchers and practitioners with information to improve the organizational setting and individual and organizational outcomes of interest. Support was found for several hypotheses and future research directions are noted.
Show less - Date Issued
- 2007
- Identifier
- CFE0001724, ucf:47299
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001724
- Title
- THE RELATIONSHIP OF PARENTS' WORK STRESS AND CHILD FUNCTIONING IN THE CONTEXT OF SPILLOVER EFFECTS, MARITAL AND PARENTING STRESS, AND PARENTS' PERCEPTIONS.
- Creator
-
Hare, Megan, Renk, Kimberly, University of Central Florida
- Abstract / Description
-
Given that working is something parents cannot avoid in our society, understanding the ramifications that work stress can have is an important tool in today's society. This study sought to investigate the impact of parents' work stress on young children in the context of work-family spillover, parenting stress, marital stress, and perceptions of parenting. As part of this study, 106 working parents of children who ranged in age from 1- to 5-years rated their stress levels across multiple...
Show moreGiven that working is something parents cannot avoid in our society, understanding the ramifications that work stress can have is an important tool in today's society. This study sought to investigate the impact of parents' work stress on young children in the context of work-family spillover, parenting stress, marital stress, and perceptions of parenting. As part of this study, 106 working parents of children who ranged in age from 1- to 5-years rated their stress levels across multiple domains (i.e., work, marriage, and parenting), their perceived parenting behaviors, and their young child's emotional and behavioral functioning. Correlational results of this study supported the hypothesis that these variables would be related significantly to young children's emotional and behavioral functioning. Further, hierarchical regression analyses revealed that a single variable did not predict significantly young children's internalizing and externalizing behaviors but that a combination of work stress, work-family spillover, parenting stress, marital stress, and perceptions of parenting were important in accounting for variance. The results of this study emphasized the importance of studying the selected variables collectively so that employers can evaluate current workplace policies and resources to help minimize work stress and work-family spillover.
Show less - Date Issued
- 2014
- Identifier
- CFH0004645, ucf:45308
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004645
- Title
- LATINO CULTURAL COMPETENCY IN SOCIAL WORK EDUCATION: A REVIEW OF THE LITERATURE.
- Creator
-
Menendez, Liana, Leon, Ana, University of Central Florida
- Abstract / Description
-
Cultural competence serves as resource for social workers and other helping professionals to improve service delivery by using approaches that are compatible with the client's cultural values and beliefs. As the Latino population continues to grow, understanding the culture has important implications for social work practice, advocacy and research. There is a dearth of cultural competence training and educational programs that seek to effectively identify, address and meet the unique cultural...
Show moreCultural competence serves as resource for social workers and other helping professionals to improve service delivery by using approaches that are compatible with the client's cultural values and beliefs. As the Latino population continues to grow, understanding the culture has important implications for social work practice, advocacy and research. There is a dearth of cultural competence training and educational programs that seek to effectively identify, address and meet the unique cultural and linguistic needs of Latinos. With the growing population and a lack of culturally responsive services, clinicians familiar with the Latino culture and Latino cultural competency training and education programs, disparities among Latinos will continue to steadily rise. It is important for social work students and clinicians to receive advanced training in understanding the diverse needs of Latino populations. The purpose of this thesis is to review the existing literature to identify culturally competent practice methods and examine efforts to prepare social work students and clinicians to work with the Latino population. A search was conducted using PsychINFO, PubMed, Education Resources Information Center (ERIC) and Cumulative Index of Nursing and Allied Health Literature (CINAHL) databases. Key terms used in the searches were"cultural competency training", "cultural competency education" and/or "social work/clinician" coupled with terms Hispanic or Latino. This thesis concludes with some considerations for integrating Latino cultural competency into the social work curriculum.
Show less - Date Issued
- 2015
- Identifier
- CFH0004747, ucf:45346
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004747
- Title
- PERCEPTUAL GROUPING BY CLOSURE IN VISUAL WORKING MEMORY.
- Creator
-
Neira, Sofia, Neider, Mark, University of Central Florida
- Abstract / Description
-
Research on visual working memory (VWM) suggests a capacity limit of three to four objects (Luck & Vogel, 1997), but recent studies on the fidelity of VWM capacity for objects indicates that informational bandwidth, which can vary with factors like complexity and amenability to perceptual grouping, can interact with this capacity (Brady, Konkle & Alvarez, 2011). For example, individual features can be grouped into objects for an added benefit in VWM capacity (Xu, 2002). Along these lines, the...
Show moreResearch on visual working memory (VWM) suggests a capacity limit of three to four objects (Luck & Vogel, 1997), but recent studies on the fidelity of VWM capacity for objects indicates that informational bandwidth, which can vary with factors like complexity and amenability to perceptual grouping, can interact with this capacity (Brady, Konkle & Alvarez, 2011). For example, individual features can be grouped into objects for an added benefit in VWM capacity (Xu, 2002). Along these lines, the Gestalt principles of proximity and connectedness have been shown to benefit VWM, although they do not influence capacity equally (Xu 2006; Woodman, Vecera & Luck, 2003). Closure, which has not been investigated for its influence in VWM capacity, is similar to connectedness and proximity as it promotes the perception of a coherent object without physical connections. In the current experiment, we evaluated whether closure produces similar or greater VWM capacity advantages compared to proximity by having participants engage in a change detection task. Four L-shaped features were grouped in tilted clusters to either form an object (closure condition) or not (no-object condition), with a set size of two (8 L features), four (16 L features), or six clusters (24 L features). Following a brief mask (1000 ms), the orientation of one cluster was changed (tilted 25 or -25 degrees) on half the trials. Our results indicate that there was no difference in accuracy or reaction time for the perceptual grouping conditions of closure/no-object, although we did find a main effect for set size and change conditions. Overall, it seems that grouping by closure provides no further advantages to VWM capacity than proximity; however, more experiments need to be conducted to solidify the findings of the current experiment.
Show less - Date Issued
- 2016
- Identifier
- CFH2000038, ucf:45604
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000038
- Title
- Male College Presidents With Children: Recollections on Perceptions of Work-life Balance.
- Creator
-
Armstrong, Asquith, Cintron Delgado, Rosa, Owens, J. Thomas, Boyd, Karen, Santana, Maria, University of Central Florida
- Abstract / Description
-
ABSTRACTThis qualitative research study explored the recollections of work-life balance andfatherhood through the reported experiences and reflections of select college presidents.The researcher used a basic narrative research practice which allowed individuals to sharetheir experiences while shedding light on how the individuals see themselves. Sixcollege presidents participated in one-on-one semi structured interviews.The researcher incorporated Clark's Work-family border theory as the...
Show moreABSTRACTThis qualitative research study explored the recollections of work-life balance andfatherhood through the reported experiences and reflections of select college presidents.The researcher used a basic narrative research practice which allowed individuals to sharetheir experiences while shedding light on how the individuals see themselves. Sixcollege presidents participated in one-on-one semi structured interviews.The researcher incorporated Clark's Work-family border theory as the frameworkfor this study, which recognized that a working individual largely functions in twoseparate domains: work and family. The presidents' experiences were examined withinthis construct and addressed the research question that guided the study: How do malecollege presidents balance their work and life domains?This study represents a significant addition to the scholarly literature concerningwork-life balance experienced by male college presidents as little scholarship exists inthis area. The results led to recommendations and implications for college Boards ofTrustees, professional development associations, spouses, and partners.
Show less - Date Issued
- 2016
- Identifier
- CFE0006254, ucf:51044
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006254
- Title
- St. Augustine.
- Creator
-
Wittemann, A. (Adolph), Albertype Co, PALMM (Project)
- Abstract / Description
-
Period photographs of St. Augustine landmarks from the early 1900s.
- Date Issued
- 1904
- Identifier
- AAB6345QF00001/18/200508/04/200516398BfamKa D0QF, FHP C CF 2005-01-19, FCLA url 20050202xOCLC, FIPS12109, 60545993, CF00001677, 2579341, ucf:18084
- Format
- E-book
- PURL
- http://purl.flvc.org/fcla/tc/fhp/CF00001677.jpg
- Title
- THE RELATIONSHIP BETWEEN PSYCHOMETRICALLY-DEFINED SOCIAL ANXIETY AND WORKING MEMORY PERFORMANCE.
- Creator
-
Paskowski, Timothy, Bedwell, Jeffrey, University of Central Florida
- Abstract / Description
-
Anxiety disorders are among the most commonly diagnosed class of mental illness in the United States, and often involve abnormally high levels of stress and social fear. Despite high lifetime prevalence rates, social anxiety disorder (SAD) has remarkably low diagnosis and treatment rates. Furthermore, while individuals with other specific psychiatric disorders tend to exhibit significant neuropsychological deficits, neuropsychological functioning in individuals with SAD remains largely...
Show moreAnxiety disorders are among the most commonly diagnosed class of mental illness in the United States, and often involve abnormally high levels of stress and social fear. Despite high lifetime prevalence rates, social anxiety disorder (SAD) has remarkably low diagnosis and treatment rates. Furthermore, while individuals with other specific psychiatric disorders tend to exhibit significant neuropsychological deficits, neuropsychological functioning in individuals with SAD remains largely untested. A majority of the few existing studies concerning neuropsychological performance in SAD samples focus on specific functions, and their limited results are highly mixed. The primary objective of this investigation was to provide a more thorough, broad assessment of both auditory and visual working memory as related to psychometrically-defined social anxiety disorder. In addition, this study aimed to help clarify as to whether such deficits are related to the construct of social anxiety, or whether any potential deficits are better explained by generalized state and/or trait (in-the-moment) anxiety. The implications of a deficit in the visual and/or auditory working memory domains are multifaceted. For example, such a deficit may lead to the inability to detect visual cues in social situations. The inability to process these social cues has the potential to exacerbate some SAD- related symptoms, such as fear of humiliation and judgment. Twenty-nine college students completed both phases of this study, including an assessment of state and trait anxiety as well as social phobia and a four-part working memory battery. An analysis of the Phase II data indicates that individual scores on the four measures of both visual and auditory working memory did not relate to trait and/or state anxiety or psychometrically-defined social anxiety. Thus, it appears that social, generalized trait, and generalized state anxiety do not relate to a neuropsychological deficit in either type of working memory in this sample population. However, we did find a statistical trend suggesting that as social anxiety increased, there was a relative decrease in visual vs. auditory working memory. This statistical trend remained after covarying for state and trait anxiety respectively. Therefore, future research in this area should examine the discrepancy in performance between the auditory and visual working memory domains as it relates to both diagnosed social phobia and psychometrically-defined social anxiety.
Show less - Date Issued
- 2011
- Identifier
- CFH0003798, ucf:44744
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0003798
- Title
- Conceptualizing the Role of Severity in Counterproductive Work Behavior: Predicting Employee Engagement in Minor and Severe CWBs.
- Creator
-
Ciarlante, Katherine, Shoss, Mindy, Bennett, Rebecca, Jex, Steve, University of Central Florida
- Abstract / Description
-
Counterproductive work behaviors (CWBs) have been identified as pervasive employee behaviors with the potential to cause significant harm in the workplace (e.g., Sackett (&) DeVore, 2001). Because of the considerable threat CWBs pose to organizational and employee well-being, a literature has emerged to better understand the structure of these behaviors and identify the factors and conditions that effect employee engagement in counterproductive acts. While past research has distinguished...
Show moreCounterproductive work behaviors (CWBs) have been identified as pervasive employee behaviors with the potential to cause significant harm in the workplace (e.g., Sackett (&) DeVore, 2001). Because of the considerable threat CWBs pose to organizational and employee well-being, a literature has emerged to better understand the structure of these behaviors and identify the factors and conditions that effect employee engagement in counterproductive acts. While past research has distinguished between types of CWBs, i.e., theft, sabotage, withdrawal, less attention has been paid to the specific forms these behaviors take. For example, being two hours late to work is more serious and harmful than being five minutes late, and traditional frequency-based measures fail to distinguish between these behaviors. In order to understand and account for the full range of variation in employee CWBs, research must advance in ways that incorporates severity. The current study introduces a novel conceptualization of CWB severity that distinguishes between intra-behavioral differences and develops modified versions of the CWB-C (Spector et al., 2006; Bennett (&) Robinson, 2000) which assess engagement in low and high severity versions of each CWB. These new measures are utilized to test a hypothesized model of CWB severity that predicts how individual (negative affect) and contextual factors (self-control (&) perceived consequences) interact to predict low and high severity CWBs. This research seeks to expand our understanding of the diverse ways employees respond to stressful work conditions and represents an important first step in identifying the types of employees and work environments that are associated with the most harmful, high severity, CWBs. Implications for future CWB research are discussed.
Show less - Date Issued
- 2019
- Identifier
- CFE0007616, ucf:52557
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007616
- Title
- SAFETY AND OPERATIONAL EVALUATION OF DYNAMIC LANE MERGING IN WORK ZONES.
- Creator
-
Harb, Rami, Radwan, Essam, University of Central Florida
- Abstract / Description
-
Traffic safety and mobility of roadway work zones have been considered to be one of the major concerns in highway traffic safety and operations in Florida. In intent to expose Florida's work zones crash characteristics, the Florida Traffic Crash Records Database for years 2002, 2003 and 2004 were explored. Statistical models were estimated and Florida's work zone crash traits for single vehicle crashes and two-vehicle crashes were drawn. For the single-vehicle crashes, trucks were...
Show moreTraffic safety and mobility of roadway work zones have been considered to be one of the major concerns in highway traffic safety and operations in Florida. In intent to expose Florida's work zones crash characteristics, the Florida Traffic Crash Records Database for years 2002, 2003 and 2004 were explored. Statistical models were estimated and Florida's work zone crash traits for single vehicle crashes and two-vehicle crashes were drawn. For the single-vehicle crashes, trucks were found more likely to be involved in single vehicle crashes in freeway work zones compared to freeways without work zones. Straight level roadways are significantly affected by the presence of work zones. The lighting condition is also one of the risk factors associated with work zone single-vehicle crashes. In fact, at work areas with poor or no lighting during dark conditions, motor vehicles are more prone for crashes compared to non-work zone locations with poor or no lighting during dark. The weather condition is positively associated with single-vehicle work zone crashes. Results showed that during rainy weather, drivers are less likely to be involved in work zone crashes compared to the same weather conditions in non-work zone locations. This fact may be due to the vigilant driving pattern during rain at work zones. For the two-vehicle work zone crashes, results showed that drivers younger than 25 years of age and drivers older than 75 years old have the highest risk to be the at-fault driver in a work zone crash. Male drivers have significantly higher risk than female drivers to be the at-fault driver. The model conspicuously shows that drivers under the influence of narcotics/alcohol are more likely to cause crashes (i.e. at-fault driver) at work zones. Road geometry and the lighting condition were significant risk factors associated with two-vehicle work zone crashes. Freeways straight segments are more susceptible to crashes in work zone areas. Poor lighting or no lighting at all during dark can lead to significantly higher crash hazard at work zones. Foggy weather causes a significant mount in work zone crash risk compared to non-work zone locations. In addition to that, work zones located in rural areas have higher crash potential than work zones located in urban areas. After examining the current Florida work zone Maintenance of Traffic (MOT) plans, known as the Motorist Awareness System (MAS), it was realized that this system is static hence does not react to changing traffic conditions. An ITS-based dynamic lane management system, known as dynamic lane merging system, was explored to supplement the existing MAS plans. Two forms of dynamic lane management were recognized as dynamic lane merging namely the early merge and the late merge. These two systems were designed to advise drivers on definite merging locations. Previously deployed dynamic lane merging systems comprise several Portable Changeable Message Signs (PCMS) and traffic sensors. The addition of multiple PCMSs to the current MAS plans may encumber the latter and usually requires relatively extensive equipment installation and relocation which could be inefficient for short term movable work zones. Therefore, two Simplified Dynamic Lane Merging Systems (SDLMS) were designed, deployed, and tested on Florida's short term movables work zones. The first SDLMS was a simplified dynamic early merge system (early SDLMS) and the second SDLMS was a simplified dynamic late merge system (late SDLMS). Both SDLMS consisted of supplementing the MAS plans used in Florida work zones with an ITS-based lane management system. From the two-to-one work zone configuration (first site), it was noted that the ratio of the work zone throughput at the onset of congestion over the demand volume was significantly the highest for the early SDLMS compared to the MAS and late SDLMS. Travel time through the work was the lowest for the early SDLMS, followed by the late SDLMS, and then MAS. However, the differences in mean travel times were not statistically significant. It was also concluded that the early SDLMS resulted in higher early merging compared to the MAS and that the late SDLMS in higher late merging compared to the MAS. The first site was used as a pilot for testing the system since data collection was limited to two days for each MOT type. Hence, operational measures of effectiveness (MOEs) could not be evaluated under different demand volumes. It should also be noted that the RTMS was not available during the MAS data collection which disabled us from collecting speed data. From the three-to-two work zone configuration site, data was collected extensively relative to the first site. The RTMS was available for all three MOT types tested which enabled the collection of the speed data that are used as a safety surrogate measure. The mean speed fluctuation in the closed lane was the highest under the MAS system for all demand volumes and in all three lanes. Comparing the dynamic early merge and the dynamic late merge mean speed fluctuations in the closed lane and the middle lane, results showed that the mean speed fluctuation for the early merge are lower than those of the late merge under all demand volumes. However, the difference in the mean speed fluctuation is only statistically significant under demand volume ranging between 1 and 500 veh/hr. As for the shoulder lane, it was noted that the speed mean speed fluctuation is significantly the lowest for demand volumes ranging between 1500 veh/hr and 2000 veh/hr under the late SDLMS compared to the early SDLMS and the MAS. The ratio of the throughput over demand volume was taken as the operational MOE. Results showed that the Dynamic early merge performs significantly better than the regular MAS under demand volume ranging between 500 veh/hr and 2000 veh/hr. Results also showed that the dynamic late merge perform better than the MAS under volumes ranging between 1500 veh/hr and 2000 veh/hr and significantly poorer than the MAS under low volumes. Therefore, the late SDLMS is not recommended for implementation under low volumes. Results also showed that the late SDLMS performs better than the early SDLMS under higher volume (ranging between 1500 veh/hr to 2000 veh/hr). A simulated work zone with a two-to-one lane closure configuration was coded in VISSIM and operational and safety MOEs under MAS, early SDLMS, and late SDLMS were compared under different drivers' adherence rate to the merging instructions, truck percentage in the traffic composition, and traffic demand volumes. Results indicated that throughputs are higher in general under the early SDLMS, travel times are lower under the early SDLMS. However, overall, the early SDLMS resulted in the highest speed variance among MOT types. The MAS resulted in the lowest speed variances overall
Show less - Date Issued
- 2009
- Identifier
- CFE0002741, ucf:48159
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002741
- Title
- Album of Florida & West Indies hotels.
- Creator
-
Davis & Campbell (Miami Beach, Fla.), PALMM (Project)
- Abstract / Description
-
Provides photographic views, with accompanying text, of hotel exteriors and interiors, including lobbies, dining rooms, beaches, pools, golf courses, parks, etc. Two airlines are also mentionned. Rate book contains an index, brief profiles of the cities and many advertisements for local businesses.
- Date Issued
- 1938
- Identifier
- AAA6242QF00004/30/200312/30/200321877BfamIa D0QF, ONICF150- 10, FHP C CF 2003-04-30, FCLA url 20031224xOCLC, 53965980, CF00001593, 2568626, ucf:12300
- Format
- E-book
- PURL
- http://purl.flvc.org/fcla/tc/fhp/CF00001593.jpg
- Title
- THE EFFECT OF IN-VEHICLE WARNING SYSTEMS ON DRIVERRESPONSE IN WORK ZONES.
- Creator
-
Whitmire II, James, Kincaid, Peter, University of Central Florida
- Abstract / Description
-
This research investigated the effectiveness of in-vehicle information technologies on driver behavior in work zones. In-vehicle information devices can increase driver awareness to an oncoming change in traffic flow and provide specific guidelines for driving speed requirements, lane merging strategies, or unexpected changes in the roadway (e.g., detours and lane shifts). The overall conditional effects for vehicle speed are significant; that is, both the audio and visual groups out...
Show moreThis research investigated the effectiveness of in-vehicle information technologies on driver behavior in work zones. In-vehicle information devices can increase driver awareness to an oncoming change in traffic flow and provide specific guidelines for driving speed requirements, lane merging strategies, or unexpected changes in the roadway (e.g., detours and lane shifts). The overall conditional effects for vehicle speed are significant; that is, both the audio and visual groups out performed the control group within the simulated work zone. Participants in audio group did outperform the visual group, not significantly though. The overall conditional effects for total time in violation are significant; that is, both the audio and visual groups out performed the control group. The test session results for Total Time in Violation were statistically significant, F(2, 57) = 7.17, p < .01. The strength of relationship between the warning messages and the Total Time in Violation with regular road signage, as assessed by η2 , was strong, the warning message factor accounting for 20% of the variance of the dependent variable.
Show less - Date Issued
- 2007
- Identifier
- CFE0001589, ucf:47112
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001589