Joshua Gray, PhD

Joshua C Gray, PhD

Name: Joshua C Gray, PhD

USU Department of Primary Appointment: 
Medical and Clinical Psychology
Faculty Rank: 
Assistant Professor
Uniformed Services University of the Health Sciences, Bethesda, MD

Research Interests:
addiction, impulsivity, behavioral economics, psychiatric genetics, neuroeconomics

Office Phone: 
(301) 295-0374


B.A., Psychology, University of Maryland, College Park, MD
M.S., Clinical Psychology, University of Georgia, Athens, GA
Predoctoral Psychology Resident, Brown University, Providence, RI
Ph.D., Clinical Psychology, University of Georgia, Athens, GA


I utilize large open datasets (e.g.,;; to investigate the genetic and neurobiological basis of addiction and related phenotypes, namely impulsivity. In collaboration with multidisciplinary teams within and across institutions, I apply genetic, neuroimaging, and machine learning methodology to dissect these constructs at a high level of resolution. The goal of this research is to advance our understanding of the biological basis of psychological disorders and risk factors in order to improve treatment individualization and influence the development of novel therapeutics.

I am also contributing to research exploring the organizational factors impacting well-being, readiness, and turnover in service members exhibiting harmful alcohol use in order to inform care for alcohol abuse at military treatment facilities.


  • Gray, J. C., Treloar, H., Wemm, S. E., & Miranda, R., Jr. (2018). Predictors of topiramate tolerability in heavy cannabis using adolescents and young adults: A secondary analysis of a randomized, double-blind, placebo-controlled trial. Journal of Clinical Psychopharmacology, 38(2), 134-137. doi: 10.1097/JCP.0000000000000843
  • Brody, G. H., Gray, J. C., Yu, T., Barton, A. W., Beach, S. R. H., Galván, A., MacKillop, J., Windle, M., Chen, E., Miller, G. E., & Sweet, L. H. (2017). Protective prevention effects on the association of poverty with brain development. JAMA Pediatrics, 171(1), 46-52. doi: 10.1001/jamapediatrics.2016.2988
  • Sanchez-Roige, S., Fontanillas, P., Elson, S. L., 23andMe Research Team, Pandit, A., Schmidt, E., Forster, J., Abecasis, G. R., Gray, J. C., de Wit, H., Davis, L. K., MacKillop, J., & Palmer, A. A. (2017). Genome-wide association study of delay discounting in 23,217 adult research participants of European ancestry. Nature Neuroscience, 21, 16-18. doi: 10.1038/s41593-017-0032-x
  • Gray, J. C., Amlung, M. T., Owens, M., Acker, J., Brown, C. L., Brody, G. H., Sweet, L. H., & MacKillop, J. (2017). Neuroeconomics of tobacco demand: An initial investigation of the neural correlates of cigarette cost-benefit decision making in male smokers. Scientific Reports, 7, 41930. doi: 10.1038/srep41930
  • Owens, M., Gray, J. C., Amlung, M. T., Oshri, A., Sweet, L. H., & MacKillop J. (2017). Neuroanatomical foundations of delayed reward discounting decision making. NeuroImage, 161, 261-270. doi: 10.1016/j.neuroimage.2017.08.045
  • Gray, J. C., Amlung, M. T., Palmer, A. A., & MacKillop, J. (2016). Syntax for calculation of discounting indices from the Monetary Choice Questionnaire and Probability Discounting Questionnaire. Journal of the Experimental Analysis of Behavior, 106(2), 156-163. doi: 10.1002/jeab.221