Published quarterly beginning in February

Factors in forgetting in spider monkeys, ateles geoffroyi / Todd M. Freeberg

Individual variation in black-capped chickadee (Poecile atricapillus) foraging behavior in response to a predator model / Laura R. Dykstra, Jeniffer J. Jenkins, Chery R. Dykstra, Kelly A. Williams

The coding of object thickness in plants : when roots matter

Visual discrimination of size and perception of the delboef illusion in the domestic cat (Felis silvistres catus): A development disjunction / Oxana Bainszegi, Peter Szenczi, Andrea Urrutia, Sandra Martinez-Byer

Initial evidence for eliciting contrafreeloading in grey parrots (Psittacus erithacus) via the opportunity for playful foraging / Gabriella E. Smith, Diana Greene, Leign Ann Hartsfield, Irene M. Peppersberg

How do communicative cues shape the way that dogs (Canis familiaris) encode objects? / Angie M. Johnston, Alysssa M. Arre, Michael J. Bogese, Laurie R. Santos

The effects of positive and negative experiences on subsequent behavior and cognitive performance in Capuchin monkeys (Sapajus [Cebus] apella) / Mackenzie E. Webster, Sarah F. Brosnan

Effects of ethanol ingestion on aversive conditioning in honey bees (Apis mellifera L.) / Timothy A. Black, Kiri Li N. Stauch, Harrington Wells, Charles J. Abramson

Behavioral and hormonal changes following social instability in young rhesus macaques (Macaca mulatta) / Lauren J. Wondell, Stefano S. K. Kaburu, Amanda M. Dettmer

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.