Current Lab Members

Roger Ratcliff
Gail McKoon

Alex Fennell, Graduate Student

Inhan Kang, Graduate Student

Inhan is a fifth-year doctoral student in the Quantitative Psychology program. He graduated from Seoul National University with a B.A. in Psychology and a B.S. in Statistics in 2014 and an M.A. in Quantitative Psychology in 2016. His research interests include the diffusion model, process modeling, and generalized latent variable modeling. His current focus is to extend the cognitive/mathematical modeling approaches to psychometrics and to tackle issues in the measurement of latent ability/trait.

Yonatan Vanunu, Postdoctoral Fellow
Email: yyv1984 @

Yonatan’s research focuses on how people make decisions under cognitive load. He examines the underlying mechanism of perceptual and preferential decisions when it is presumably difficult to encode and process all given information, and the biases that might arise in choice due to the demands imposed. His theory is based on the common assumption that people are adaptive in nature and therefore likely to employ a selective mechanism, in which attention is used to prioritize part of the information with respect to the decision maker’s goals and available resources. To test the role of attention in encoding and processing under cognitive load, he uses statistical and cognitive process models to analyse behavioural measures, such as participants’ choices, response time and eye-movements. Yonatan also studies the decision process during driving among young and older adults, when the driving environment imposes demands on attention and response. He uses the Diffusion model framework to answer how aging and task demands might affect the different components of the decision process, and how these changes in the components can account for response time and accuracy-rates when making decisions on the road. Yonatan has a Masters degree in Cognitive Psychology from Tel Aviv University and a PhD in Cognitive Psychology from the University of New South Wales, Sydney.

Russ Childers, Systems Developer/Engineer

Russ joined the lab in 2003 as a programmer and electrical engineer. He programs the real-time data-gathering software and conducts data analysis. Russ also has integrated eyetracking, driving simulators, touchscreens, EEG, and voice control into the data-gathering and analysis process. Russ has been a co-author on several papers produced by the lab. In his spare time, Russ enjoys playing the flute and saxophone in several area concert and orchestral bands, plus he is an avid amateur astronomer.

 Madeline Healey, Research Assistant

Madeline graduated from OSU with a B.A. in Psychology in spring of 2021. She has been with the lab since November of 2021 and takes care of running experiments and day-to-day operations. Outside of the lab, Madeline has an impressive sock collection, loves to swim, and enjoys a good book. 


Hannah Lehmann, Student Research Assistant

Hannah is a fourth-year undergraduate student at OSU majoring in psychology. She has been with the lab since 2021 and is excited to learn and develop her skills in the field of cognitive psychology. She is interested in working with the community, analyzing data, and cognitive modeling. Hannah is a member of OSU’s sketch comedy group Backburner and loves a good joke.  

Ilyse Freeman, Student Research Assistant

Ilyse is a second-year undergraduate student at OSU majoring in Neuroscience and minoring in Film Studies. She has been with the lab since March 2022 and is eager to explore her research interests. She is excited to learn data analysis and start applying what she has learned in the classroom so far to real experiments. Ask Ilyse about her keychain collection!

Recent Graduate Students + Postdocs

Corey White, Graduate student

Jeff Starns, Postdoc

Fabio Leite, Postdoc

Eric-Jan Wagenmakers, Postdoc

Pablo Gomez, Graduate student

Simon Farrell, Postdoc

Jeff Rouder, Postdoc

David Allbritton, Postdoc

Trisha Van Zandt, Postdoc

These recent past lab members took jobs in private industry:

Chelsea Voskuilen
Ph.D. student, now working as Marketing Data Scientist at Ford Motor Company

Jessica Love
Ph.D. student, now working as Editor-in-Chief of Kellogg Insight at Northwestern University

Bethany Casto
Master’s student, now working as Cybersecurity Project Management Consultant at JPI in WV

Victor Intermaggio
Master’s student, now working as a Researcher for Riot Games (previously Business Analyst with Amazon)

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