Principal Investigator

Michael J. Frank

Doctorate, Neuroscience, Psychology, 2004
University of Colorado at Boulder | Boulder, Colorado
M.A., Electrical Engineering, 2000
University of Colorado at Boulder | Boulder, Colorado
B.Sc., Electrical Engineering, 1997
Queen’s University | Kingston, Ontario, Canada
Contact Information:
Phone: (401) 863-6872
Hometown: Montreal, Canada 

Postdoctoral Researchers


Matthew Nassar

Ph.D., Neuroscience, 2012
University of Pennsylvania | Philadelphia, Pennsylvania
Research Interests

I am interested in how neuromodulators might allow cortical circuitry to facilitate different behavioral regimes in order to allow optimization across a broad array of environmental contexts. For example, one branch of my research investigates the role of catecholamines in adjusting the relative contributions of internal and external sources of information to improve learning and perception in dynamic environments. My research relies on detailed quantification of human behavior in cognitive and perceptual tasks, computational modeling, and indirect measurements of neural function such as fMRI, EEG, and pupillometry.
Contact Information

Brown University CLPS department
190 Thayer Street
Providence RI, 02906
153 Metcalf hall
[email protected]


Andrew Westbrook

PhD Washington University
St. Louis 2016
MA Washington University
St. Louis 2012
University of North Carolina
Chapel Hill 2006
BS University of Illinois
Urbana-Champaign 2003

Research Interests

Andrew is interested in decision-making about cognitive effort. In particular, he’s interested in what role dopamine plays in learning costs and benefits and also translating instantaneous motivation into promoting or undermining cognitive control. When he’s not investing cognitive effort in his work, he spends his time rock climbing, getting riled up about politics, and reading the news obsessively.

Graduate Students


Louis Gularte

MA, Philosophy, 2013
Northern Illinois University | DeKalb, Illinois

BA, Philosophy, 2008
BA, Psychology, 2008
University of Notre Dame | Notre Dame, Indiana

Research Interests

My philosophy dissertation work is on the nature of (dis)value and morality and how that interacts with the nature of suffering; my main interests are in metaethics and the philosophy of language and mind. In cognitive science, my hope is to get as clear as possible on the nature of suffering by looking at the interactions between negative affect on the one hand and reward learning and decision-making more broadly on the other.

Contact Information:
Email: lgularte[@]
Hometown: Gonzales, CA


Alexander Fengler

BSc. International Business
MSc. Neuroeconomics
MPhil. Statistics

Contact Information
mail: [email protected]
[email protected]

Hometown: Bergheim, Germany


Harrison Ritz

MSc. – Psychology, University of Western Ontario | London, ON, CA
BSc. – Psychology | Queen’s University, ON CA

Research Interests:
My undergraduate and masters’ theses focused on the neural correlates of attentional control during auditory and speech perception. My current research interests are broadly about characterizing neural systems that dynamically control decision-making in noisy, unstable environments. In my free time, I like watching films, distance running, batch cooking, and creating or listening to music.
Contact Information:
[email protected]


Laboratory Manager

Andrea Mueller

B.S. Psychology & B.S. Evolutionary Anthropology 2016
University of New Mexico | Albuquerque, NM
Research Interests

I am interested in how people process and express emotion, specifically what leads to internal versus external expression. My current work explores the relationship between inherent action-outcome biases and emotional approach-avoidance biases.
Contact Information
email: andrea_mueller[@]
Hometown: Albuquerque, NM

Undergraduate Research Assistants


Hazem Abbas

Caleb Thomas

Alumni and Collaborators


Medical Collaborators

Wael Asaad, MD, PhD
 Assistant Professor of Neurosurgery
Brown University Medical School

Joseph Friedman, MD
Clinical Professor, Dept. of Clinical Neuroscience
 Brown University Medical School

Scott J. Sherman, MD, PhD
Associate Professor of Neurology
University of Arizona College of Medicine
Former Lab Members

Nicholas Franklin
Postdoctoral Researcher, Sam Gershman Lab
Harvard University | Cambridge, MA

Anne Collins, Ph.D.
Former Postdoctoral Researcher
Assistant Professor
UC Berkeley | Berkeley, CA

James F Cavanagh, Ph.D.
Former Postdoctoral Researcher
Assistant Professor, Department of Psychology
University of New Mexico | Albuquerque, NM

Jeffrey Cockburn
Former PhD Student
Postdoctoral Researcher
California Institute of Technology | Pasadena, CA

Thomas Wiecki
Former PhD Student
Lead Data Scientist, Quantopian Inc.

Bradley Doll, Ph.D.
Former Graduate Student
Senior Data Scientist, Dotdash & The Daily Beast

Julie Helmers
Former Laboratory Manager
MS in Data Science Student
New York University

Sean Masters
Former Laboratory Manager
Medical Student
Central Michigan University| Mount Pleasant, MI

Hyeyoung Shin
Former PhD Student
Brown University | Providence, Rhode Island

Danne Elbers
Former Visiting Masters Student
Vrije Universiteit, Amsterdam

Rasmus Bruckner
Former Visiting Masters Student
Humboldt-Universität, Berlin

Christina Figueroa
Former Laboratory Manager
Graduate Student
Marquette University| Milwaukee, WI

Shikhar Kumar
Former Graduate Student
University of Arizona | Tucson, AZ


Former RAs

Sara Slama
Benjamin Gold
Emily Nguyen
Rob St. Louis
Ian Eisenberg
Angad Kochar
Carissa Aboubakare
Jacklyn Babowitch
Daniel Valmas
Alison Mullin
Robin Martens
Anuj Patel
Joseph DeJonge
Hans Pope
Julia Rothschild
Wenting Xie
Anthony Jang
Ezra Nelson
Giovanna Moraes
Nicholas Handfield-Jones
Michelle Kulowski
Nicole Bilbo
Claire Hernon
Adi Melamed
Patrick LaChance
Ji Sun (Julia) Kim
Anish Aitharaju
Ameyo Attila
Neille-Ann Tan
Huangqi Jiang 蒋黄麒
Sarah Master