Effect of a Cognitive Challenge Device Containing Food and Non-Food Rewards on Chimpanzee Well-Being

Language-Trained Chimpanzees (Pan troglodytes) Delay Gratification by Choosing Token Exchange Over Immediate Reward Consumption

(2012) MICHAEL J. BERAN et al.   AMERICAN JOURNAL OF PRIMATOLOGY

Cognitive Research in Zoo-Housed Chimpanzees: Influence of Personality and Impact on Welfare

(2012) ELIZABETH S. HERRELKO et al.   AMERICAN JOURNAL OF PRIMATOLOGY

Problem solving in great apes (Pan paniscus, Pan troglodytes, Gorilla gorilla, and Pongo abelii): the effect of visual feedback

(2012) Christoph J. Völter et al.   ANIMAL COGNITION

Barriers and traps: great apes’ performance in two functionally equivalent tasks

(2012) Gema Martin-Ordas et al.   ANIMAL COGNITION

Great ape cognition and captive care: Can cognitive challenges enhance well-being?

(2011) Fay E. Clark   APPLIED ANIMAL BEHAVIOUR SCIENCE

An experimental, comparative investigation of tool use in chimpanzees and gorillas

(2009) E.V. Lonsdorf et al.   ANIMAL BEHAVIOUR

Navigating two-dimensional mazes: chimpanzees (Pan troglodytes) and capuchins (Cebus apella sp.) profit from experience differently

(2009) Dorothy M. Fragaszy et al.   ANIMAL COGNITION

Token transfer between mother and offspring chimpanzees (Pan troglodytes): mother–offspring interaction in a competitive situation

(2009) Masayuki Tanaka et al.   ANIMAL COGNITION

On the use of an automated learning device by group-housed dwarf goats: Do goats seek cognitive challenges?

(2009) Jan Langbein et al.   APPLIED ANIMAL BEHAVIOUR SCIENCE

Tubes, tables and traps: great apes solve two functionally equivalent trap tasks but show no evidence of transfer across tasks

(2008) Gema Martin-Ordas et al.   ANIMAL COGNITION

A brief note on the effects of novel enrichment on an unwanted behaviour of captive bonobos

(2007) Katalin Csatádi et al.   APPLIED ANIMAL BEHAVIOUR SCIENCE

Assessment of positive welfare: A review

(2007) J.W. Yeates et al.   VETERINARY JOURNAL