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PARTICIPANT'S PERCEPTION OF REALISM AND PEDIATRIC PAIN ASSESSMENT UTILIZING A VIRTUAL PATIENT: A PILOT STUDY
Title
PARTICIPANT'S PERCEPTION OF REALISM AND PEDIATRIC PAIN ASSESSMENT UTILIZING A VIRTUAL PATIENT: A PILOT STUDY.
Creator
Carson, Alexandra, Anderson, Mindi, University of Central Florida
Abstract / Description
The use of simulation in curriculum affords students with the opportunity to enhance clinical skills in a safe environment. However, certain aspects of patient assessment are difficult to reproduce in current simulators, such as changes in facial expressions. Facial expressions are of particular importance when assessing for the presence and severity of pain in the pediatric population. Inconsistencies found in accurate identification of pain suggest the necessity of improved pain assessment...
Show moreThe use of simulation in curriculum affords students with the opportunity to enhance clinical skills in a safe environment. However, certain aspects of patient assessment are difficult to reproduce in current simulators, such as changes in facial expressions. Facial expressions are of particular importance when assessing for the presence and severity of pain in the pediatric population. Inconsistencies found in accurate identification of pain suggest the necessity of improved pain assessment training. This study evaluated nursing student's perceptions of a virtual patient designed to realistically display varying levels of pain in the pediatric patient. Additional purposes of this study were to evaluate the student's ability to accurately rate pediatric pain using a virtual patient with and without other indicators of pain, explore the students experience learning pediatric pain in nursing school, and explore the use of simulation in curriculum to teach pain. A total of N=11 nursing students participated in this study. Students were presented with a series of virtual patient faces and asked to provide a pain rating from 0-10 utilizing a pediatric pain assessment tool, and to numerically list the facial features used to identify the pain rating they chose. A questionnaire was then completed which included questions regarding the realism of the virtual patient, pain and curriculum, and simulation. Results of the study showed students rated pain lower than the expected rating when presented with virtual patient faces only, and rated pain closer to the expected rating when presented with virtual patient faces and other indicators of pain such as vital signs and verbal cues. A noticeable range of reported pain rating levels existed for all virtual faces in which students rated the pain lower or higher than the true pain rating. The majority of students reported the virtual patient was moderately to extremely realistic, and 90.9% (n=10) reported they would like to have the technology implemented into a simulation scenario.
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Date Issued
2016
Identifier
CFH2000085, ucf:45525
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFH2000085
IMITATING INDIVIDUALIZED FACIAL EXPRESSIONS IN A HUMAN-LIKE AVATAR THROUGH A HYBRID PARTICLE SWARM OPTIMIZATION - TABU SEARCH ALGORITHM
Title
IMITATING INDIVIDUALIZED FACIAL EXPRESSIONS IN A HUMAN-LIKE AVATAR THROUGH A HYBRID PARTICLE SWARM OPTIMIZATION - TABU SEARCH ALGORITHM.
Creator
Husk, Evan, Gonzalez, Avelino, University of Central Florida
Abstract / Description
This thesis describes a machine learning method for automatically imitating a particular person's facial expressions in a human-like avatar through a hybrid Particle Swarm Optimization - Tabu Search algorithm. The muscular structures of the facial expressions are measured by Ekman and Friesen's Facial Action Coding System (FACS). Using a neutral face as a reference, the minute movements of the Action Units, used in FACS, are automatically tracked and mapped onto the avatar using a hybrid...
Show moreThis thesis describes a machine learning method for automatically imitating a particular person's facial expressions in a human-like avatar through a hybrid Particle Swarm Optimization - Tabu Search algorithm. The muscular structures of the facial expressions are measured by Ekman and Friesen's Facial Action Coding System (FACS). Using a neutral face as a reference, the minute movements of the Action Units, used in FACS, are automatically tracked and mapped onto the avatar using a hybrid method. The hybrid algorithm is composed of Kennedy and Eberhart's Particle Swarm Optimization algorithm (PSO) and Glover's Tabu Search (TS). Distinguishable features portrayed on the avatar ensure a personalized, realistic imitation of the facial expressions. To evaluate the feasibility of using PSO-TS in this approach, a fundamental proof-of-concept test is employed on the system using the OGRE avatar. This method is analyzed in-depth to ensure its proper functionality and evaluate its performance compared to previous work.
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Date Issued
2012
Identifier
CFH0004286, ucf:44949
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFH0004286
The Effects of Facial Cues on Consumer Judgment and Decision-Making
Title
The Effects of Facial Cues on Consumer Judgment and Decision-Making.
Creator
Liu, Fan, He, Xin, Wang, Ze, Mao, Huifang, Sivo, Stephen, University of Central Florida
Abstract / Description
This dissertation investigates the roles of facial cues in consumer behavior. Specifically, the research examines the effect of facial structural resemblance, facial expressions, and other perceptual cues(-)in both individual and group settings(-)on consumer judgment and decision-making. Essay 1 examines the influence of facial resemblance on consumers' product purchase likelihood. This effect is moderated by consumers' mental construal, such that the effect of increased facial resemblance on...
Show moreThis dissertation investigates the roles of facial cues in consumer behavior. Specifically, the research examines the effect of facial structural resemblance, facial expressions, and other perceptual cues(-)in both individual and group settings(-)on consumer judgment and decision-making. Essay 1 examines the influence of facial resemblance on consumers' product purchase likelihood. This effect is moderated by consumers' mental construal, such that the effect of increased facial resemblance on product purchase likelihood occurs among consumers with high-level construals but not among those with low-level construals. Results of three experimental studies show that increased facial resemblance among team members enhances the perceived entitativity of the group, which in turn leads to more favorable intention of purchasing the product offered by the group. Essay 2 investigates the differential effects of recipients' group entitativity on two types of donation (time vs. money). Through three studies, the research demonstrates that high (versus low) group entitativity among the recipients increases donation of time but decreases donation of money. Such differential effects on donation of time versus money are driven by consumers' emotional or cognitive well-being associated with time or money donations. In essay 3, the effect of smile intensity on customer behavior is shown to be moderated by power and salience of ulterior motive. When employees' ulterior motive is not salient to customers, low-power customers evaluate the employee with intensified smiles more favorably compared to high-power customers. In contrast, when ulterior motive is made salient, high-power rather than low-power customers react more positively to smile intensity. Results show that the interactive effects between smile, power, and ulterior motive are driven by customers' warmth and competence perceptions. Collectively, this dissertation focuses on consumers' face-based judgments of individuals and teams, and investigates how such facial cues might influence consumers' attitude, purchase intention, and prosocial behavior.
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Date Issued
2015
Identifier
CFE0005828, ucf:50930
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0005828
EVALUATING NEONATAL FACIAL PAIN EXPRESSION: IS THERE A PRIMAL FACE OF PAIN?
Title
EVALUATING NEONATAL FACIAL PAIN EXPRESSION: IS THERE A PRIMAL FACE OF PAIN?.
Creator
Schiavenato, Martin, Byers, Jacqueline, University of Central Florida
Abstract / Description
Pain assessment continues to be poorly managed in the clinical arena. A review of the communication process in pain assessment is carried out and the hierarchical approach often recommended in the literature –with self-report as its "gold-standard," is criticized as limited and simplistic. A comprehensive approach to pain assessment is recommended and a model that conceptualizes pain assessment as a complex transaction with various patient and clinician dependant factors is proposed....
Show morePain assessment continues to be poorly managed in the clinical arena. A review of the communication process in pain assessment is carried out and the hierarchical approach often recommended in the literature –with self-report as its "gold-standard," is criticized as limited and simplistic. A comprehensive approach to pain assessment is recommended and a model that conceptualizes pain assessment as a complex transaction with various patient and clinician dependant factors is proposed. Attention is then focused on the pediatric patient whose pain assessment is often dependent on nonverbal communicative action. The clinical approaches to pain assessment in this population –mainly the use of behavioral/observational pain scales and facial pain scales, are explored. The primal face of pain (PFP) is identified and proposed theoretically as an important link in the function of facial pain scales. Finally, the existence of the PFP is investigated in a sample of 57 neonates across differences in sex and ethnic origin while controlling for potentially confounding factors. Facial expression to a painful stimulus is measured based on the Neonatal Facial Coding System (NFCS) and applying an innovative computer-based methodology. No statistically significant differences in facial expression were found in infant display thereby supporting the existence of the PFP.
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Date Issued
2007
Identifier
CFE0001808, ucf:47373
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0001808
TOWARD BUILDING A SOCIAL ROBOT WITH AN EMOTION-BASED INTERNAL CONTROL AND EXTERNAL COMMUNICATION TO ENHANCE HUMAN-ROBOT INTERACTION
Title
TOWARD BUILDING A SOCIAL ROBOT WITH AN EMOTION-BASED INTERNAL CONTROL AND EXTERNAL COMMUNICATION TO ENHANCE HUMAN-ROBOT INTERACTION.
Creator
Marpaung, Andreas, Lisetti, Christine, University of Central Florida
Abstract / Description
In this thesis, we aim at modeling some aspects of the functional role of emotions on an autonomous embodied agent. We begin by describing our robotic prototype, Cherry--a robot with the task of being a tour guide and an office assistant for the Computer Science Department at the University of Central Florida. Cherry did not have a formal emotion representation of internal states, but did have the ability to express emotions through her multimodal interface. The thesis presents the results of...
Show moreIn this thesis, we aim at modeling some aspects of the functional role of emotions on an autonomous embodied agent. We begin by describing our robotic prototype, Cherry--a robot with the task of being a tour guide and an office assistant for the Computer Science Department at the University of Central Florida. Cherry did not have a formal emotion representation of internal states, but did have the ability to express emotions through her multimodal interface. The thesis presents the results of a survey we performed via our social informatics approach where we found that: (1) the idea of having emotions in a robot was warmly accepted by Cherry's users, and (2) the intended users were pleased with our initial interface design and functionalities. Guided by these results, we transferred our previous code to a human-height and more robust robot--Petra, the PeopleBot™--where we began to build a formal emotion mechanism and representation for internal states to correspond to the external expressions of Cherry's interface. We describe our overall three-layered architecture, and propose the design of the sensory motor level (the first layer of the three-layered architecture) inspired by the Multilevel Process Theory of Emotion on one hand, and hybrid robotic architecture on the other hand. The sensory-motor level receives and processes incoming stimuli with fuzzy logic and produces emotion-like states without any further willful planning or learning. We will discuss how Petra has been equipped with sonar and vision for obstacle avoidance as well as vision for face recognition, which are used when she roams around the hallway to engage in social interactions with humans. We hope that the sensory motor level in Petra could serve as a foundation for further works in modeling the three-layered architecture of the Emotion State Generator.
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Date Issued
2004
Identifier
CFE0000286, ucf:46228
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0000286