Canteloup C, Biff Cera M, Barrett BJ, van de Waal E. 2021. Processing of novel food reveal payoff and rank-biased social learning in a wild primate. Scientific Reports. 11, 9550 (2021).

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Monteza-Moreno CM, Dogandžić T, McLean KA, Castillo-Caballero PL, Mijango-Ramos Z, Del Rosario-Vargas E, Crofoot MC, Barrett BJ. 2020. White-faced capuchin, Cebus capucinus imitator, hammerstone and anvil tool-use in riparian habitats on Coiba Island, Panama. 2020. International Journal of Primatology. 41: 429–433.

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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.

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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.

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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.

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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