Timothy A. Shahan

Professor I Director of Behavior Analysis Specialization I Brain & Cognition Specialization


Timothy A. Shahan

Contact Information

Office Location: EDUC 499
Email: tim.shahan@usu.edu
Additional Information:

Emphasis

Operant conditioning, choice, behavioral momentum, resurgence, conditioned reinforcement, information theory

Biography

Dr. Shahan received his Ph.D. in Psychology from West Virginia University in 1998. He was a postdoctoral fellow at the University of Vermont, and then a Research Assistant Professor at the University of New Hampshire until 2003 when he accepted a position at Utah State University. He was the recipient of the 2006 B.F. Skinner Young Researcher Award and the 2023 Distinguished Contribution to Basic Behavior Analysis Award, both from Division 25 of the American Psychological Association. Dr. Shahan’s research focuses on fundamental processes in conditioning and learning, adaptation, and behavioral regulation with an emphasis on development, testing, and translation of quantitative theories of behavior. His research uses animal models to examine how reinforcement and reinforcement-related stimuli contribute to attention, decision-making, persistence, and relapse. For more than 20 years, his research has been supported by various institutes at NIH, including NIMH, NIAAA, NIDA, and NICHD. Dr. Shahan also collaborates directly with clinical scientists to translate his research to the clinic. Specifically, this work uses insights derived from his basic research to reduce the severe problem behavior of children with intellectual and developmental disabilities. Dr. Shahan is a Fellow of the Association for Behavior Analysis International, he has served as president of the Society for the Quantitative Analyses of Behavior, and as chair of the Biobehavioral Regulation, Learning, and Ethology study section at NIH. In his spare time, he likes to ski, travel, and spend time with his family.

Planning to accept a new graduate student for Fall 2026.

Notable Publications

  • Gallistel, C.R. & Shahan, T.A. (2024). Time-scale invariant contingency yields one-shot reinforcement learning despite extremely long delays to reinforcement. Proceedings of the National Academy of Sciences, 121(30), e2405451121. 

  • Shahan, T.A. (2022). A theory of the extinction burst. Perspectives on Behavior Science, 45, 495-519. 
  • Shahan, T.A., Browning, K.O, Nall, R.W. (2020). Resurgence as Choice in Context: Treatment duration and on/off alternative reinforcement. Journal of the Experimental Analysis of Behavior, 113, 57-76.
  • Cunningham, P.J., & Shahan, T.A. (2018). Suboptimal choice, reward-predictive signals, and temporal information. Journal of Experimental Psychology: Animal Learning and Cognition, 44, 1-22.
  • Gallistel, C.R., Craig, A. R, & Shahan, T.A. (2019). Contingency, contiguity, and causality in conditioning: Applying information theory and Weber's Law to the assignment of credit problem. Psychological Review, 126, 761-773.
  • Shahan, T.A. (2017). Moving beyond reinforcement and response strength. The Behavior Analyst, 40, 107-121.
  • Shahan, T. A., & Cunningham, P. (2015). Conditioned reinforcement and information theory reconsidered. Journal of the Experimental Analysis of Behavior, 103, 405-418.