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Altenhoff: Perceiving Soft Tissue Break Points in the Presence of Friction

Perceiving Soft Tissue Break Points in the Presence of Friction

Tuesday, April 29th at 10:00am
Brackett 419

Committee: Dr. Chris Pagano (chair), Dr. Tim Burg, Dr. Ben Stephens, Dr. Rich Pak

Abstract: In minimally invasive surgery (MIS), surgeons face several perceptual challenges due to the remote interaction with the environment, such as distorted haptic feedback through the instruments due to friction produced from the rubber trocar sealing mechanisms at the incision site. As a result, surgeons sometimes unintentionally damage healthy tissues during MIS due to excessive force. Research has demonstrated that useful information is available in the haptic array of soft tissues, which allows novices to successfully perceive the penetration distance remaining until a material will fail based on displacement and reactionary forces of simulated tissues using a haptic invariant, Distance-to-Break (DTB). Attunement and calibration training will be used in the current study to investigate whether observers are able to identify material break points in nonlinear compliant materials through haptic force application, while ignoring haptic stimulation not lawfully related to the properties specifying DTB, including friction. A pretest, feedback, posttest, and transfer-of-training phase design will be used, allowing participants to probe four virtually simulated materials at varying levels of friction: no friction, low friction, and high friction in the first experiment, and pull the simulated tissues in the second experiment to investigate if perception of DTB generalizes to other tasks used in MIS.

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CBBS at the Graduate Research and Discovery Symposium

Drew Morris earned 1st place, Kristen Jennings earned 2nd place, and Janet Donnelly earned 3rd place.


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HFES Student Chapter Guest Speaker: Dr. Chris Wickens on the role of effort in choice, safety, and healthcare

Chris Wickens will be speaking to Clemson HFES on “the role of effort in choice, safety, and healthcare” via Skype at our second HFES Month event! Come hear this talk and enter your name in a drawing to win an HF/E prize. Snacks will be provided.

WHEN: April 11th at 1:00pm
WHERE: Brackett 214

RSVP HERE (RSVP by April 8th)

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HFES Kickoff Scavenger Hunt!

Join us in a HF/E scavenger hunt. Sign up in teams no larger than 4 people and compete to show off your HF knowledge and win gift cards! Also, officer nominations will begin.

WHEN: April 4th at 1:30 pm
WHERE: Starting at McAdams 226

RSVP HERE

https://docs.google.com/forms/d/17Vvz5lEgjG9Pna8apnqcGToPsoGRA4K4kw00ruF0zFY/viewform

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Stanyar: IMPACT OF PHYSICAL AND PSYCHOSOCIAL WORKPLACE HAZARDS ON EMPLOYEE HEALTH: AN IRISH TALE OF CIVIL SERVANT WORKERS

Kyle Stanyar

When: Wednesday April 16th, 2014; 10:15am
Where: 419 Brackett Hall
Committee: Dr. Sinclair (Chair), Dr. Rosopa, Dr. McCubbin, and Dr. Merritt

IMPACT OF PHYSICAL AND PSYCHOSOCIAL WORKPLACE HAZARDS ON EMPLOYEE HEALTH: AN IRISH TALE OF CIVIL SERVANT WORKERS
Obesity, mental health problems, and absenteeism are both economic and health burdens for employers and employees. Research suggests that physical and psychosocial hazards in the workplace contribute to health risks and health problems among employees. There is a need for researchers to examine how exercise, diet, and age interact with the negative effects of workplace hazards upon health. Hypotheses 1a through 3b predicted that physical and psychosocial workplace hazards would negatively impact body mass index (BMI), general mental health, and sickness absences. Further, hypotheses 4a through 9b predicted that exercise and diet would buffer stress from occupational hazards upon BMI, mental health, and sickness absences. Finally, hypotheses 10a through 11b predicted that age would act as a moderator between occupational hazards and employee health outcomes. A sample of 16,651 civil servant workers from the Northern Ireland Civil Service Workforce were examined. The data was split into two groups based on salary; senior level pay grade and lower level pay grade. The results confirmed hypotheses 1a, 1b, 3a, 3b, 11a, and 11b for the lower level pay grade, but failed to support hypotheses 2 and 4a through 10b. Additionally, the results confirmed hypotheses 1b for the senior level pay grade; however the results failed to confirm hypotheses 1a and hypotheses 2 through 11b. Theoretical and organizational implications are discussed.

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Robertson: The Agreeableness of Conscientiousness: A Facet Level Examination of Personality, Interaction, and Curvilinearity on the Citizenship Behavior and Task Performance Relationship

Where: Wednesday, April 23rd, 2014 at 11:00am, Brackett 419

Committee: Dr. Patrick J. Rosopa (chair), Dr. Fred Switzer, Dr. Peg Tyler

Title: “The Agreeableness of Conscientiousness: A Facet Level Examination of Personality, Interaction, and Curvilinearity on the Citizenship Behavior and Task Performance Relationship”

Abstract: Recent research has highlighted that the relationship between organizational citizenship behavior and task performance is nonlinear such that the occurrence of task performance behaviors will decrease as more time and resources are devoted to organizational citizenship behaviors. This occurs because of the restrictions of resource allocation theory which posit that employee resources are finite and limited, so there will be some trade-off between engaging in various performance behaviors. The current study seeks to examine the potential moderating effect of certain facets of agreeableness, conscientiousness, and their interaction. Agreeableness is thought to moderate the relation between individually focused citizenship (OCB-I) and task performance by accelerating the decrease in performance; conscientiousness is thought to moderate the relation between organizationally focused citizenship (OCB-O) decelerating the decrease in performance. Three way interactions of personality and citizenship will also be examined. Additionally, the mediating effect of job satisfaction will be analyzed because it has been shown to be important in forming the relationship between dispositional characteristics and performance behaviors.

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Wilson: ASSESSING THE BITE COUNTER AS A WEIGHT LOSS TOOL

ASSESSING THE BITE COUNTER AS A WEIGHT LOSS TOOL on Tuesday, April 8, 2014, in Brackett Hall, Room 419, at 1030 am.
ABSTRACT

Obesity is a growing health concern throughout the world. Health risks associated with obesity such as diabetes and heart disease result in obesity costing us over $170 million annually. Self-monitoring of Energy Intake (EI) is a critical element of a successful weight loss plan; however current methods to monitor EI are cumbersome and prone to under reporting. The primary purpose of the study was to develop and test an experimental diet protocol based on user feedback from the Bite Counter. A secondary purpose was to examine if this protocol would affect meaningful weight loss by device users. Data were collected from 30 participants (15 control) in a study where Bite Counter feedback was used to titrate daily bite count goals in order to meet a 1 to 2 pound per week weight loss goal measured against the control group which was only given weight loss literature. 77% of our participants were able to use the device to self-monitor a majority of the eating activities. Although weight loss was higher in the Bite Counter group, we determined that a diet protocol based solely on using the Bite Counter did not produce statistically significant weight loss over the ten-week study period. The Bite Counter was able to help the control group sustain their weight loss throughout the entire study period. The study determined that aggressive screening measures during study uptake is needed in order to ensure the recruitment of participants who are likely to complete future studies. User profile personas were developed to assist future researcher identify and classify users as successful or unsuccessful candidates for losing weight using the Bite Counter.

Committee Chair: Dr. Eric Muth
Committee Members: Dr. Adam Hoover and Dr. Patrick Rosopa

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Focus on Creative Inquiry Poster Forum

Please join us to celebrate the accomplishments of Clemson’s Creative Inquiry students, at the
9th Annual
Focus on Creative Inquiry Poster Forum

9th Annual
Focus on Creative Inquiry

Thursday, April 3, 2014
Clemson University, 2nd floor Hendrix Center

Poster Sessions: 10 am – 12 pm & 1 pm – 3 pm
Plenary Lecture: 3 pm – 4 pm
Spider’s Silk is Awesome and Other Adventures in Material Science
Dr. Marian (Molly) Kennedy

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HFDG: Is genetics the key?? … Individual differences in the design of interfaces and training programs

Is genetics the key?? … Individual differences in the design of interfaces and training programs
Dr. Ericka Rovira

Place: 419 Brackett Hall
Time: 1:00-2:00 pm Friday, March 28

(note, this will be a teleconferenced presentation)

Abstract: Human performance may be adversely affected when operators interact with highly reliable but imperfect systems. To date, models of human automation interaction emphasize how much authority the human or the machine should have at different decision making stages. Of particular interest is how human automation interactions are affected when the automated support tool is imperfect. The current research addresses types of human automation interaction mechanisms that may reduce performance decrements associated with imperfect automation. Results investigating contextual automation and automation etiquette will be presented. Additionally, optimizing human performance often requires assessment at the individual level because it provides an understanding of how individual variability contributes to operational performance. Molecular methods have been used to examine the genetic basis of basic cognitive function (Greenwood & Parasuraman, 2003; Posner et al., 2007). Individual differences in situation awareness and decision making in operational environments likely involve variation in cognitive processes of visual attention, working memory, and spatial attention. Research examining the utility and viability of using the allelic association method as a neuroergonomics approach that examines brain function in relation to operational tasks will be presented. This will pave the way for further theoretical progress in learning about the basis of individual differences in cognition and in human factors applications for training and interface design.

Dr. Ericka Rovira. She is an Associate Professor in the Engineering Psychology program at the United States Military Academy in West Point, NY. Dr. Rovira received a B.S. in Engineering Psychology and Biomedical Engineering from Tufts University, Medford, MA (2000) and a Ph. D. in Applied Experimental Psychology from The Catholic University of America, Washington, DC (2006), under the direction of Dr. Raja Parasuraman. Also, she is currently the president-elect of APA Division 21 (Applied Experimental and Engineering Psychology).

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Departmental Award for Outstanding Faculty Publication for 2013

Patrick J. Rosopa

P. J. Rosopa, M. M. Schaffer, & A. N. Schroeder
“Managing heteroscedasticity in general linear models.”
Psychological Methods

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