Quantity estimation and comparison in western lowland gorillas (Gorilla gorilla gorilla)
Publication/Journal: Animal Cognition
Keywords: area, gorillas, number, quantity estimation, ratio
2013
What counts for ‘counting’? Chimpanzees, Pan troglodytes, respond appropriately to relevant and irrelevant information in a quantity judgment task
Publication/Journal: Animal Behaviour
Keywords: approximate number system, chimpanzee, enumeration, pan troglodytes, quantity judgment, transposition
2013
Bears ‘Count’ Too: Quantity Estimation and Comparison in Black Bears, Ursus americanus
Publication/Journal: Animal Behaviour
Keywords: area, bear, number, quantity estimation, ratio, ursus americanus
2012
Quantity judgments of auditory and visual stimuli by chimpanzees (Pan troglodytes)
Publication/Journal: Journal of Experimental Psychology: Animal Behavior Processes
Keywords: auditory stimuli, chimpanzees, empty sets, numerical cognition, quantity judgments
2012
Rhesus monkeys (Macaca mulatta) and capuchin monkeys (Cebus apella) remember future responses in a computerized task
Publication/Journal: Journal of Experimental Psychology: Animal Behavior Processes
Keywords: cebus apella, macaca-mulatta, monkeys, planning, prospective coding
2012
Numerical judgments by chimpanzees (Pan troglodytes) in a token economy
Publication/Journal: Journal of Experimental Psychology: Animal Behavior Processes
Keywords: chimpanzees, numerousness judgments, pan troglodytes, quantity comparison, tokens
2011
Beyond stimulus cues and reinforcement signals: A new approach to animal metacognition
Publication/Journal: Journal of Comparative Psychology
Keywords: comparative psychology, metacognition, monkeys, primate cognition, uncertainty monitoring
2010
Can nonhuman primates use tokens to represent and sum quantities?
Publication/Journal: Journal of Comparative Psychology
Keywords: capuchin monkeys, chimpanzee, quantity representation, summation, token
2010
Use of exclusion by a chimpanzee (Pan troglodytes) during speech perception and auditory–visual matching-to-sample
Publication/Journal: Behavioural Processes
Keywords: adult female, auditory, chimpanzee, lexigrams., matching to sample, response, vuisual
2010
Delay of gratification by chimpanzees (Pan troglodytes) in working and waiting situations
Publication/Journal: Behavioural Processes
Keywords: chimpanzees, conditionoing., food rewards, performance on computer task, self-control task
2009