Object and color naming in chimpanzees (Pan troglodytes).

Asano, Tomohiko; Kojima, Tetsuya; Matsuzawa, Tetsuro; Kubota, Kisou; Murofushi, Kiyoko

doi:10.2183/pjab.58.118

Cited by 64 publications

(32 citation statements)

References 1 publication

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“…she had been trained to use lexigrams as names for 14 objects and 11 colors in a conditional matching situation (Asano, Kojima, Matsuzawa, Kubota, & Murofushi, 1982;Matsuzawa, 1985a). She had learned to match Arabic numerals when shown one to six identical objects, such as six pencils or three blocks (Matsuzawa, 1985b;Matsuzawa et al, 1986).…”

Section: Methodsmentioning

confidence: 99%

Numerical Matching Behavior by a Chimpanzee (Pan troglodytes): Subitizing and Analogue Magnitude Estimation

Murofushi

1997

Jpn Psychol Res

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A female chimpanzee (Pan troglodytes) received numerical matching‐to‐sample training. The comparative stimuli used in all experiments were Arabic numerals. The sample stimuli in Experiment 1 were semi‐random patterns of one to six dots displayed on a computer monitor. In addition to the increase of dot numbers to seven, three specific patterns were mixed into random patterns in Experiment 2. The sizes of dots were changed between and within sessions during Experiment 3. A set of objects in different colors and forms was displayed on the video monitor as a sample in Experiment 4. Results of these experiments showed that the chimpanzee was able to label, with numerals up to seven, a set of dots as well as objects displayed in a homogeneous or heterogeneous pattern. Reaction time as a function of the number of dots suggested that her performance was based on subitizing and estimation of magnitude analogous to the number.

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Section: Methodsmentioning

confidence: 99%

Numerical Matching Behavior by a Chimpanzee (Pan troglodytes): Subitizing and Analogue Magnitude Estimation

Murofushi

1997

Jpn Psychol Res

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“…His chimpanzee subject, a young female named Ai, was able to correctly assign cardinal values between 1 and 6 to arrays of 3-dimensional objects presented as a hand-held array (e.g., 5 yellow pencils). Ai had received previous cognitive training with a graphic symbol system (e.g., Asano, Kojima, Matsuzawa, Kubota, & Murofushi, 1982;Matsuzawa, 1985b;Matsuzawa, Asano, Kubota, & Murofushi, 1986). The visual symbols were affixed to a vertical keyboard that Ai could access on the wall of her testing room; individual keys bearing the symbols that represented specific food items and other familiar objects (e.g., key, pencil, etc.)…”

Section: Historical Perspectivesmentioning

confidence: 99%

Primate Numerical Competence: Contributions Toward Understanding Nonhuman Cognition

Boysen

Hallberg

2000

Cognitive Science

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Nonhuman primates represent the most significant extant species for comparative studies of cognition, including such complex phenomena as numerical competence, among others. Studies of numerical skills in monkeys and apes have a long, though somewhat sparse history, although questions for current empirical studies remain of great interest to several fields, including comparative, developmental, and cognitive psychology; anthropology; ethology; and philosophy, to name a few. In addition to demonstrated similarities in complex information processing, empirical studies of a variety of potential cognitive limitations or constraints have provided insights into similarities and differences across the primate order, and continue to offer theoretical and pragmatic directions for future research. An historical overview of primate numerical studies is presented, as well as a summary of the 17-year research history, including recent findings, of the Comparative Cognition Project at The Ohio State University Chimpanzee Center. Overall, the archival literature on number-related skills and counting in nonhuman primates offers important implications for revising our thinking about comparative neuroanatomy, cross-species (human/ape) cognitive similarities and differences, and the evolution of cognition represented by the primate continuum.

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“…1) and 4 graduate students served as subjects. Ai had an extensive history of experiments on perceptual and cognitive abilites before initiation of the present experiment [5,[14][15][16]. Ai had been pre viously trained to name 6 humans, 6 chimpanzees and 2 orang-utans with single upper case letters of the Roman alphabet [5,15], She lived in an outdoor enclo sure with 5 other adult chimpanzees and maintained her free-feeding body weight during the present experi ment.…”

Section: Subjectsmentioning

confidence: 99%

Superiority of Conspecific Faces and Reduced Inversion Effect in Face Perception by a Chimpanzee

Tomonaga¹,

Itakura²,

Matsuzawa³

1993

IJFP

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Object and color naming in chimpanzees (Pan troglodytes).

Cited by 64 publications

References 1 publication

Numerical Matching Behavior by a Chimpanzee (Pan troglodytes): Subitizing and Analogue Magnitude Estimation

Numerical Matching Behavior by a Chimpanzee (Pan troglodytes): Subitizing and Analogue Magnitude Estimation

Primate Numerical Competence: Contributions Toward Understanding Nonhuman Cognition

Superiority of Conspecific Faces and Reduced Inversion Effect in Face Perception by a Chimpanzee

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