Welcome to the Ergonomics and Applied Statistics Lab

The EASt Lab is a multi-disciplinary research laboratory taking human factors and ergonomics approaches to examine operator behaviors and performance in complex systems and environments.  We use advanced statistical and modeling methods to design, develop, and evaluate human-centered solutions.  We center our work within the healthcare sociotechnical system with an objective of improving efficacy, quality, and effective care.

Department of Industrial Engineering

Current Projects

Using LLM-based chatbots for health education

We are evaluating the impact that chatbot and AI technology have on learning and developing an understanding of complex health concepts and conditions.



STEPS2Clemson

We are working on an NSF S-STEM project (STEPS2Clemson) to support transfer students to Clemson engineering majors and studying how to best support transfer students for success.


Evaluating ergonomic issues for Ultrasound Technicians

We are evaluating the use of technology (e.g., gestural human computer interaction) and education to address ergonomics issues that ultrasound technicians face in providing patient care.

Interface and interaction designs for LLM-based chatbots

We are evaluating the impact of different design and interaction characteristics of LLM-based chatbots that can improve usability and effectiveness.

Past Projects


Modeling emergency department processes and populations for pediatric mental and behavioral health
We have evaluated large data sets to examine how processes and interventions could improve the delivery of care for pediatric mental and behavioral health patients.

Evaluating the effectiveness of healthcare chatbots
The use of chatbots is growing in telehealth applications, yet few studies have examined how design characteristics influence the effectiveness of chatbots in the healthcare domain.  We are examining how chatbot characteristics including language (i.e., reading level), personas (i.e., doctor, nurse, or nursing student), and the use of avatars influence the effectiveness, usability, and trust in healthcare chatbots.

Examining the design of anesthesia workstations
We have examined the way that the anesthesia workstations within operating rooms are designed and arranged to support the work within anesthesia care.  This has included task analysis, workspace assessments, and examining the movement of supplies and materials around in the workspace during a surgical case.

Using vignettes as an interview tool to examine variability in anesthesia work practices
Despite decades of research and improvements in safety, the risk of patient harm in the practice of anesthesia remains.  The failure of efforts to effectively address patient harm represents a lack of consideration of the cognitive processes and diverse work practices employed in anesthesia delivery.  We’ve use vignettes (hypothetical scenarios) as interview tools to elucidate how anesthesia providers may diverge from one another in their decision-making processes.  We have identified variability in anesthesia providers’ decision-making strategies which must be considered in the development of future efforts to address patient harm, to support anesthesia providers’ critical resilience.

Examining the use of 3D gestural input systems
In-air gestures are a promising input modality as they are expressive, easy to use, quick to use, and natural for users.  They may be particularly useful for domains like anesthesia, as the use of gestures could bypass the bacterial transmission that may occur when touching devices. However, gestural systems can be challenging to develop as gesture choice is dependent on context, and intuitive gestures may not be constant for every user (for example, an expert may find different gestures intuitive when compared to a novice). We are studying how expertise and exposure influence gestural behaviors, and whether we can develop Bayesian statistical models that can accurately predict how users would choose intuitive gestures.

Examining the effect of patient portals and the characteristics of portal users
Patient portals are websites or mobile applications that are designed to help patients access their Electronic Health Records (EHR), health summaries, pay bills, schedule appointments and, in some cases, interact with care providers. The use of patient portals has been associated with generating positive healthcare outcomes in recent studies.  We are interested in examining the characteristics of EHR patient portal users, how they use patient portals, how EHR patient portal users access health information online, and how these factors impact users’ trust in their patient portals.

Examining how individuals with IBD search and use online health information
Individuals with chronic diseases are a unique user population in terms of their potential use of online health information in the self-management of their health. Crohn’s disease and ulcerative colitis are collectively referred to as inflammatory bowel disease (IBD), a chronic condition that affects the intestines, colon, and bowel. It is a complex, incurable disease that can result in long-term disability or mortality, and its highest incidence occurs in younger adults. A recent study suggested that the incidence of IBD has seen a dramatic increase to over 0.3% in North America and many European countries, and the incidence of IBD is expected to increase. We are interested in examining which factors may influence individuals with IBD to search the internet for healthcare-related information, what information they search for, and how to better support individual’s in their self-care of their IBD.

Using eye-tracking to evaluate the effectiveness of discharge instructions
Discharge instructions (DI) are documents and information provided to patients when they complete a procedure or exam and need to follow up information or self-care tasks.  The design of these information tools is a critical aspect of preventing complications and rehospitalizations.  We are examining the design characteristics of DI using eye trackers to study how individuals engage with and read DIs. We are working to provide design recommendations and strategies for efficient and effective discharge instructions.

Our Team

Dr. David Neyens

Lab Director
Associate Professor of Industrial Engineering
Email: dneyens (at) clemson.edu

Nusrath Zahan

PhD Student
Email: nzahan [at] clemson.edu

Sara Sadralashrafi

PhD Student
Email: ssadral [at] g.clemson.edu

Sam Koscelny

PhD Student
Email: skoscel [at] clemson.edu

PhD ALUMNI

Josh Biro, PhD, 2023
Rong Yin, PhD, 2022
Katherina Jurewicz, PhD, 2020
Myrtede Alfred, PhD,  2017
Sijun Shen, PhD,  2016
Naji Abdelwanis PhD, 2013

MS ALUMNI

Samual Koscelny MS, 2024; Chris Gonzaga MS, 2024; Zachary Junkins MS, 2023; Joshua Biro MS, 2020; Courtney Linder, MS, 2020; Courtney Kinman, MS, 2018; Katherina Jurewicz, MS 2016; Mary (Ali) Hobbs, MS, 2016; Elizabeth Jamison, MS, 2016; Haley Vaigneur, MS, 2015; Puneeth Kalavagunta, MS 2015; Sagar Puro, MS, 2014; Susan Robinson, MS, 2014

Publications and Presentations

Highlighted Recent Papers

A multi-site big data analysis of factors impacting the time to disposition in pediatric mental and behavioural health emergency department visits 

Koscelny, S.N., Neyens,D.M., Zeinali, F., Taaffe, K., Joseph, A., Dietrich, A.
https://doi.org/10.1080/20476965.2025.2577093 

Modeling Anesthesia Delivery Using the SEIPS 101 Tools

DeForest, E., C. Lusk, D.M. Neyens, K. Catchpole, C. Jaruzel, C. Tobin, and J.H Abernathy III. https://doi.org/10.1016/j.apergo.2025.104555

Users Willingness to Use Healthcare Chatbot and its Perceived Impact on Health Self-Management: A Survey Study

Sadralashrafi, S., & D.M. Neyens, Y. Lee https://doi.org/10.1177/10711813251359995

All journal papers and proceedings

80 entries « 1 of 8 »

2025

1.

Zeinali, Farzad; Taaffe, Kevin; Koscelny, Samuel Nelson; Neyens, David; Soman, Devi; Joseph, Anjali; Dietrich, Ann

Evaluating the Impact of Psychiatric Emergency Units on Pediatric Mental and Behavioral Health Outcomes (Proceedings Article)

In: 2025 Winter Simulation Conference (WSC), pp. 770–781, IEEE, Seattle, WA, USA, 2025, ISBN: 979-8-3315-8726-0.

(Links | BibTeX)

2.

Koscelny, Samuel N.; Sadralashrafi, Sara; Neyens, David M.

Generative AI responses are a dime a dozen; Making them count is the challenge – Evaluating information presentation styles in healthcare chatbots using hierarchical Bayesian regression models (Journal Article)

In: Applied Ergonomics, vol. 128, pp. 104515, 2025, ISSN: 36870.

(Links | BibTeX)

3.

DeForest, Elise; Catchpole, Ken; Lusk, Connor; Abernathy, James H.; Neyens, David M.

Modeling anesthesia medication delivery using the SEIPS 101 tools (Journal Article)

In: Applied Ergonomics, vol. 128, pp. 104555, 2025, ISSN: 36870.

(Links | BibTeX)

4.

Catchpole, Ken R.; Neyens, David M.; Abernathy, James H.; Biro, Joshua

Rethinking Anesthesia Medication “Errors”: The OR-SMART Patient Safety Learning Laboratory (Journal Article)

In: Journal of Patient Safety, vol. 21, no. 7, pp. 503–509, 2025, ISSN: 1549-8417, 1549-8425.

(Abstract | Links | BibTeX)

5.

Koscelny, Samuel N.; Neyens, David M.; Zeinali, Farzad; Taaffe, Kevin; Joseph, Anjali; Dietrich, Ann

A multi-site big data analysis of factors impacting the time to disposition in pediatric mental and behavioural health emergency department visits (Journal Article)

In: Health Systems, pp. 1–14, 2025, ISSN: 2047-6965, 2047-6973.

(Links | BibTeX)

6.

Conner, Shannon; Harvey, Tyler; Boyer, D. Matthew; Kurz, Mary E.; Neyens, David

Engineering Identity of Non-Traditional Students in an Undergraduate Transfer Program (Journal Article)

In: The Journal of Continuing Higher Education, vol. 73, no. 3, pp. 271–285, 2025, ISSN: 0737-7363, 1948-4801.

(Links | BibTeX)

7.

Koscelny, Samuel N.; Rucker, Robin; Reed, Michael; Duchowski, Andrew T.; Neyens, David M.

Visual Attention in Healthcare Chatbot Interactions: Quantifying Varying Communication Styles with the K-Coefficient (Journal Article)

In: Proceedings of the Human Factors and Ergonomics Society Annual Meeting, vol. 69, no. 1, pp. 153–159, 2025, ISSN: 1071-1813, 2169-5067.

(Abstract | Links | BibTeX)

8.

Koscelny, Samuel N.; Neyens, David M.; Dietrich, Ann; Joseph, Anjali

Mapping Utilization Trends: Identifying and Understanding High-Frequency ED Users in Pediatric MBH Care (Journal Article)

In: Proceedings of the Human Factors and Ergonomics Society Annual Meeting, vol. 69, no. 1, pp. 504–509, 2025, ISSN: 1071-1813, 2169-5067.

(Abstract | Links | BibTeX)

9.

Sadralashrafi, Sara; Neyens, David M.; Lee, Yi-Ching

Users Willingness to Use Healthcare Chatbot and its Perceived Impact on Health Self-Management: A Survey Study (Journal Article)

In: Proceedings of the Human Factors and Ergonomics Society Annual Meeting, vol. 69, no. 1, pp. 2041–2048, 2025, ISSN: 1071-1813, 2169-5067.

(Abstract | Links | BibTeX)

10.

Soman, Devi Abhishek; Koscelny, Samuel Nelson; Neyens, David; Dietrich, Ann; Narasimhan, Meera; Taaffe, Kevin; Allison, David; Joseph, Anjali

Using patient journey mapping and provider workflows to understand process barriers to pediatric mental and behavioral health care in emergency departments (Journal Article)

In: Applied Ergonomics, vol. 126, pp. 104512, 2025, ISSN: 36870.

(Links | BibTeX)

80 entries « 1 of 8 »

A selection of our presented posters

We have received funding from:

Facilities

Opportunities for Students

PhD Students

Unfortunately, there are no current openings for PhD students.

However, if you are interested in inquiring, please send a letter of intent and your CV to Dr. Neyens and please reference at least one of our lab publications that interests you. 

Undergraduate Research
CI Class:
Evaluating and Improving Ergonomics in the Ceramic Arts

Contact Dr. Neyens if you are interested in joining the CI team.

Undergraduate Research
CI Class:
Human Factors in Medical Device Reprocessing

Contact Dr. Neyens if you are interested in joining the CI team.