Peter Sokol-Hessner

Peter received his Ph.D. in Psychology from New York University in Elizabeth Phelps' lab. He did postdoctoral training with Antonio Rangel at Caltech, and then with Nathaniel Daw and Elizabeth Phelps at NYU. In his work, he enjoys integrating the perspectives and methods associated with different fields, including cognitive psychology, cognitive neuroscience, and microeconomics, to understand how we assess value, how we use value to guide behavior, and the ways that emotion is integrated into those processes. Peter founded the professional development program Paths In Psychological Science in the Psychology Department at DU.

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Chelsey Pan

Chelsey is the Lab Manager and Research Assistant, splitting their time between the Sokol-Hessner and AACT Labs. They graduated from Stanford University with a B.A. in Psychology working with Professors Hyowon Gweon and Jamil Zaki in the Social Learning Lab and Stanford Social Neuroscience Lab. They researched how people learn about and make decisions regarding other’s preferences, and how motivation to affiliate influences perceptions of shared preferences. They are generally interested in the ways we engage with the social world, how one’s perceptions are influenced by their social interactions, and the potential clinical applications of such research.



Graduate Students

Hayley Brooks

Hayley is a third year graduate student researching how risky monetary decision-making changes as a function of temporal context and what this means for classic, static computational models of risky decision-making, how components of emotion relate to temporal context in risk-taking, and the underlying neural mechanisms of these effects. Hayley received her Master's degree in Psychology from New York University where she studied the relationship between sleep related problems and behavioral functioning, affective development, and cognitive processing in children with Autism Spectrum Disorder and was a junior research scientist for the NYU Baby Sleep Study led by Professor David Heeger.



Undergraduate Students

Taylor Dobyns

Taylor is a current senior studying psychology and marketing. She is currently working on her honors thesis focused on differences between who people claim to trust, and who they actually choose to trust. Upon graduating the spring of 2020, Taylor plans on enrolling in law school.


Undergraduates! Do you want research experience? Do you like decision-making and psychology? Get in touch with us to see if you'd be a good fit for our lab!


Colin Camerer, Ph.D., Caltech [web]
Liz Phelps, Ph.D., New York University [web]
Nathaniel Daw, Ph.D., Princeton University [web]
Antonio Rangel, Ph.D., Caltech [web]
Mauricio Delgado, Ph.D., Rutgers Newark [web]
Robb Rutledge, Ph.D., University College London [web]
Cate Hartley, Ph.D., New York University [web]
Jay Van Bavel, Ph.D., New York University [web]
Kateri McRae, Ph.D., University of Denver [web]
Jian Li, Ph.D., Peking University [web]
Dominic Fareri, Ph.D., Adelphi University [web]
Steve Fleming, Ph.D., University College London [web]
Candace Raio, Ph.D., New York University [web]
Damian Stanley, Ph.D., Adelphi University [web]
Oriel FeldmanHall, Ph.D., Brown University [web]
Amy Krosch, Ph.D., Cornell University [web]
Karolina Lempert, Ph.D., University of Pennsylvania [web]
Leor Hackel, M.A., Stanford University [web]


Eric Andrews

Eric is a former lab manager and is currently a Ph.D. student in Cognition and Neural Systems at the University of Arizona.

Kelsey Shaffer

Kelsey is a former lab manager and is currently working toward her Master's degree in Psychology at Williams & Mary in Williamsburg, VA.

Priscilla Stecher

Priscilla is a former undergraduate research assistant and a DU graduate of 2017. She is currently in medical school at Washington University School of Medicine in St. Louis, Missouri. 

Logan Atkinson

Logan is a former undergraduate research assistant and DU graduate of 2018. Logan was a double major in Economics and Psychology, and is planning to get a job in market research.

Ali Watson

Ali graduated from DU in 2018 as a double major in Psychology and Biology, with minors in Chemistry and Physics. She did her honors thesis in Psychology in the Sokol-Hessner Lab. She is planning to go on to medical school.