Gregory Russell Samanez-Larkin

Gregory Russell Samanez-Larkin

Assistant Professor of Psychology and Neuroscience

Education & Training

  • Ph.D., Stanford University 2010

  • M.A., Stanford University 2008


Research in our lab examines how individual and age differences in motivation and cognition influence decision making across the life span. Our research is at the intersection of a number of subfields within psychology, neuroscience, and economics including human development, affective science, cognitive neuroscience, behavioral economics, and finance. We use a combination of behavioral and neuroimaging techniques ranging from detailed measurement of functional brain activity (fMRI) and neuroreceptors (PET) in the laboratory to experience sampling in everyday life.

Smith, CT, San Juan, MD, Dang, LC, Katz, DT, Perkins, SF, Burgess, LL, Cowan, RL, Manning, HC, Nickels, ML, Claassen, DO, Samanez-Larkin, GR, and Zald, DH. "Ventral striatal dopamine transporter availability is associated with lower trait motor impulsivity in healthy adults." Translational Psychiatry 8.1 (December 7, 2018): 269-null. Full Text

Castrellon, JJ, Seaman, KL, Crawford, JL, Young, JS, Smith, CT, Dang, LC, Hsu, M, Cowan, RL, Zald, DH, and Samanez-Larkin, GR. "Individual differences in dopamine are associated with reward discounting in clinical groups but not in healthy adults." The Journal of Neuroscience : the Official Journal of the Society for Neuroscience (November 16, 2018). Full Text

Smith, CT, Dang, LC, Burgess, LL, Perkins, SF, San Juan, MD, Smith, DK, Cowan, RL, Le, NT, Kessler, RM, Samanez-Larkin, GR, and Zald, DH. "Lack of consistent sex differences in D-amphetamine-induced dopamine release measured with [18F]fallypride PET." Psychopharmacology (October 22, 2018). Full Text

Karrer, T, McLaughlin, C, Guaglianone, C, and Samanez-Larkin, G. "Reduced serotonin receptors and transporters in normal aging adults: a meta-analysis of PET and SPECT imaging studies." (September 27, 2018). Full Text

Leong, JK, MacNiven, KH, Samanez-Larkin, GR, and Knutson, B. "Distinct neural circuits support incentivized inhibition." Neuroimage 178 (September 2018): 435-444. Full Text

Löckenhoff, CE, Rutt, JL, Samanez-Larkin, GR, Gallagher, C, O'Donoghue, T, and Reyna, VF. "Age Effects in Sequence-Construction for a Continuous Cognitive Task: Similar Sequence-Trends but Fewer Switch-Points." The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences (August 10, 2018). Full Text

Dang, LC, Samanez-Larkin, GR, Smith, CT, Castrellon, JJ, Perkins, SF, Cowan, RL, Claassen, DO, and Zald, DH. "FTO affects food cravings and interacts with age to influence age-related decline in food cravings." Physiology & Behavior 192 (August 2018): 188-193. Full Text

Dang, LC, Samanez-Larkin, GR, Castrellon, JJ, Perkins, SF, Cowan, RL, and Zald, DH. "Individual differences in dopamine D2 receptor availability correlate with reward valuation." Cognitive, Affective & Behavioral Neuroscience 18.4 (August 2018): 739-747. Full Text

Seaman, KL, Green, MA, Shu, S, and Samanez-Larkin, GR. "Individual differences in loss aversion and preferences for skewed risks across adulthood." Psychology and Aging 33.4 (June 2018): 654-659. Full Text

Seaman, KL, Brooks, N, Karrer, TM, Castrellon, JJ, Perkins, SF, Dang, LC, Hsu, M, Zald, DH, and Samanez-Larkin, GR. "Subjective value representations during effort, probability and time discounting across adulthood." Social Cognitive and Affective Neuroscience 13.5 (May 2018): 449-459. Full Text


Samanez-Larkin, GR. "Decision Neuroscience and Aging." Aging and Decision Making.: Elsevier. 2015. 41-60. Full Text

Sofia Beas, B, Setlow, B, Samanez-Larkin, GR, and Bizon, JL. "Modeling Cost–Benefit Decision Making in Aged Rodents." Aging and Decision Making.: Elsevier. 2015. 17-40. Full Text

Samanez-Larkin, GR, Hagen, TA, and Weiner, DJ. "Financial Decision Making Across Adulthood." The Psychological Science of Money.: Springer New York. 2014. 121-135. Full Text

Knutson, B, and Samanez-Larkin, GR. "Brain, Decision, and Debt." A Debtor World.: Oxford University Press. October 23, 2012. 167-180. Full Text

Selected Grants

Effects of Aging on Episodic Memory-Dependent Decision Making awarded by National Institutes of Health (Co-Principal Investigator). 2018 to 2023

Short Courses in Neuroeconomics and Social Neuroscience awarded by National Institutes of Health (Principal Investigator). 2017 to 2021

Forming Science-Industry Partnerships to Link Everyday Behaviors to Well-Being awarded by Stanford University (Principal Investigator). 2017 to 2021

Research Network on Decision Neuroscience and Aging awarded by National Institutes of Health (Principal Investigator). 2016 to 2021

Dopaminergic Neuromodulation of Decision Making in Young and Middle-Aged Adults awarded by Vanderbilt University (Principal Investigator). 2017 to 2019

NEUROMODULATION OF MOTIVATED COGNITION AND DECISION MAKING ACROSS ADULTHOOD awarded by National Institutes of Health (Principal Investigator). 2012 to 2018