Monteza-Moreno CM, Dogandžić T, McLean KA, Castillo-Caballero PL, Mijango-Ramos Z, Del Rosario-Vargas E, Crofoot MC, Barrett BJ. White-faced capuchin, Cebus capucinus imitator, hammerstone and anvil tool-use in riparian habitats on Coiba Island, Panama. 2020. International Journal of Primatology.

Publisher Site. PDF.


Greggor AL, Trimmer PC, Barrett BJ, Sih A. Challenges of learning to escape evolutionary traps. 2019. Frontiers in Ecology and Evolution. 7: 408. doi: 10.3389/fevo.2019.00408.

Publisher Site. PDF.

Barrett BJ*, Zepeda E*, Pollack L, Munson A, Sih A. 2019. Counter-culture: Does social learning help or hinder adaptive response to human-induced rapid environmental change? 2019. Frontiers in Ecology and Evolution. 7: 183.

* indicates joint first authors. Publisher Site. PDF. R Code.

Trimmer PC, Barrett BJ, McElreath R, Sih A. 2019. Rapid environmental change in games: complications and counter-intuitive outcomes. Scientific Reports. 9 (1): 7373.

Publisher Site. PDF.

Barrett BJ. Equifinality in empirical studies of cultural transmission. 2019. Behavioural Processes. 161:129-38.

PDF. Simulation and Graphing Code. Publisher Site.

Städele V, Roberts ER, Barrett BJ, Strum S, Vigilant L, and Silk JB. 2019. Male-female relationships in olive baboons (Papio anubis): parenting or mating effort? Journal of Human Evolution. 127: 82-89.

Publisher Site. PDF. SI. R Code.


Clarke, PM, McElreath MB, Barrett BJ, Mabry KE, McElreath RL. 2018. The evolution of bequeathal in stable habitats. Ecology and Evolution. 00:1–14.

Publisher Site. Mathematica & R Code. Preprint.

Barrett BJ, Monteza-Moreno CM, Dogandžić T, Zwyns N, Ibañez A, Crofoot MC. Habitual stone-tool aided extractive foraging in white-faced capuchins, Cebus capucinus. Royal Society Open Science. 5 181002;

Publisher Site. PDF. SI. R code. Supplemental Video. Preprint available HERE.
In the News: Washington Post; New Scientist; Smithsonian Institute; Scientists et Avenier; Ozzy Man Reviews; BBC radio.


Silk JB, Roberts ER, Patterson SK, Barrett BJ, and Strum SC. 2017. Female-male relationships influence the form of female-female relationships in olive baboons, Papio anubis. Animal Behaviour. 131. 81-89 ; 10.1016/j.anbehav.2017.07.015.

PDF + SI. Publisher Site. Code & Model Detail.

Perry SE, Barrett BJ, Godoy I. 2017. Older, sociable white-faced capuchins (Cebus capucinus) invent more social behaviors, younger monkeys innovate more in other contexts. PNAS. 114 (30) 7806-7813;

PDF + SI. Publisher Site. Data & Code.In the News: UCLA

Barrett BJ, McElreath RL, Perry S. 2017. Payoff-biased social learning underlies the diffusion of novel extractive foraging traditions in a wild primate. Proc. R. Soc. B. 284 20170358; DOI: 10.1098/rspb.2017.0358.

Publisher Site. PDF. Data, Simulations & Code. Preprint available HERE.In the News: UC Davis


Barrett BJ, Crews AC, McElreath MB. Life on the edge: diet preferences reflect adaptation to drought in Neotoma fuscipes. bioRxiv 048363; doi:

Preprint available HERE.


Barrett, B and Ziegler, M. 2013. Ethogram (v 1.0): A Behavioral Data Collection Program. Open Source Android Mobile Application. Available: CLICK HERE FOR MORE INFO