Published quarterly beginning in February

Drawing in nonhuman primates: what we know and what remain to be investigated / Lison Martinet, Marie Pele

Computerized intertemporal choice task in Chimpanzees (Pan troglodytes) with/without postreward delay / Yutaro Sato, Yutaka Sakai, Satoshi Hirata

Chimpanzees' (Pan troglodytes) internal arousal remains elevated if they cannot themselves help a conspecific / Robert Hepach, Amrisha Vaish, Fumihiro Kano, Anna Albiach-Serrano, Leila Benzaid, Josep Call, Michael Tomasello

Learning simple and compound stimuli in social lizard (Egernia stokesii) / Birgit Szabo, Daniel W. A. Noble, Martin J. Whiting

Personality structure in bottlenose dolphins (Tursiops truncatus0 / F. Blake Morton, Lauren M. Robinson, Sabrno Brando, Alexander Weiss

How environmental unpredictability and harshness affect chimpanzees (Pan troglodytes) in risk-choice and temporal discounting tasks / Alejandro Sanchez-Amaro, Jingzhi Tan, Stephan P. Kaufhold, Sofia Fernandez-Navarro, Federico Rossano

Decision making by Busveld Gerbils (Gerbilliscus luegaster)/ Tasmin L. Rymer, Megan Cruise, Neville Pillay

Studying animal innovation at the individual level: a ratings-based assessment in Capuchin monkeys (Sapajus (Cebus) sp. / F. Blake Morton, et al.

Should I stay or should I go? Pigeons' (Columba fivia) performance of a foraging task has implication for optimal foraging theory and serial pattern learning / Henna Chandel, et al.

The Journal of Comparative Psychology® publishes original empirical and theoretical research from a comparative perspective on the behavior, cognition, perception, and social relationships of diverse species.