Dr. Suzanne Gray

Dr. Suzanne Gray started at The Alex Foundation and Pepperberg Lab in May 2012. As an undergraduate, Suzanne took Dr. Pepperberg’s course Animal Cognition. She subsequently joined the lab as a research assistant and soon after became Dr. Pepperberg’s lab manager. Suzanne graduated Tufts University in 2020 with a PhD in Experimental Psychology specializing in avian cognition. Suzanne is currently a Postdoctoral Scholar at Hunter College/CUNY advised by Dr. Diana Reiss and Dr. Pepperberg.


Ph.D., Experimental Psychology, Tufts University, 2020
M.A., Experimental Psychology, Tufts University, 2018
B.A., Psychology, Harvard University, 2014

Research Interests

Suzanne has worked with Griffin and Athena for a decade examining their attention, reasoning, and communication. Suzanne also works with several animals at Zoo New England. This collaboration supports animal enrichment and public engagement to aid efforts in welfare, conservation, and science education.

Selected Publications

Gray, S. L., Qadri, M. A. J., Brooks, D. I., & Cook, R. G. (2022). Use of different attentional strategies by pigeons and humans in multidimensional visual search. Journal of Experimental Psychology: Animal Learning and Cognition, 48(1), 46–59. https://doi.org/10.1037/xan0000310.

Gray, S.L., Qadri, M.A.J. & Cook, R.G. Towards describing scenes by animals: Pigeons’ ordinal discrimination of objects varying in depth. Learn Behavior, 49, 85–98 (2021). https://doi.org/10.3758/s13420-020-00444-3.

Pepperberg, I. M., Gray, S. L., Mody, S., Cornero, F. M., & Carey, S. (2018). Logical reasoning by a Grey parrot? A case study of the disjunctive syllogism. Behaviour, 1-37. doi:10.1163/1568539x-00003528.

Clements, K. A., Gray, S. L., Gross, B., & Pepperberg, I. M. (2018). Initial evidence for probabilistic reasoning in a grey parrot (Psittacus erithacus). Journal of Comparative Psychology, 132(2), 166-177. doi:10.1037/com0000106.

Pepperberg, I. M., Gray, S. L., Lesser, J. S., & Hartsfield, L. A. (2017). Piagetian liquid conservation in grey parrots (Psittacus erithacus). Journal of Comparative Psychology131(4), 370. doi:10.1037/com0000085.

Koepke, A. E., Gray, S. L., & Pepperberg, I. M. (2015). Delayed gratification: A grey parrot (Psittacus erithacus) will wait for a better reward. Journal of Comparative Psychology129(4), 339. doi: 10.1037/a0039553.

Péron, F., Thornberg, L., Gross, B., Gray, S., & Pepperberg, I. M. (2014). Human–Grey parrot (Psittacus erithacus) reciprocity: a follow-up study. Animal cognition17(4), 937-944.