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Chimpanzees Remember the Results of One-by-One Addition of Food Items to Sets over Extended Time Periods
Four chimpanzees were highly accurate in selecting the larger of two concurrent accumulations of bananas in two opaque containers over a span of 20 min. One at a time, bananas were placed into the containers, which were outside the chimpanzees' cages. The chimpanzees never saw more than one ban...
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| Published in: | Psychological science 2004-02, Vol.15 (2), p.94-99 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c512t-78a4c41a1688665ee79453f09306e159e2ac9e7ffa389539065e80a39b8838863 |
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| container_title | Psychological science |
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| creator | Beran, Michael J. Beran, Mary M. |
| description | Four chimpanzees were highly accurate in selecting the larger of two concurrent accumulations of bananas in two opaque containers over a span of 20 min. One at a time, bananas were placed into the containers, which were outside the chimpanzees' cages. The chimpanzees never saw more than one banana at a time, and there were no cues indicating the locations of the bananas after they were placed into the containers. The performance of these animals matched that of human infants and young children in similar tests. The chimpanzees were successful even when the sets to be compared were sufficiently large (5 vs. 8, 5 vs. 10, and 6 vs. 10) to cast doubt on the possibility that the chimpanzees were using an object file mechanism. These chimpanzees are the first nonhuman animals to demonstrate extended memory for accumulated quantity. |
| doi_str_mv | 10.1111/j.0963-7214.2004.01502004.x |
| format | article |
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| fulltext | fulltext |
| identifier | ISSN: 0956-7976 |
| ispartof | Psychological science, 2004-02, Vol.15 (2), p.94-99 |
| issn | 0956-7976 1467-9280 |
| language | eng |
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| source | International Bibliography of the Social Sciences (IBSS); Business Source Ultimate; JSTOR Archival Journals and Primary Sources Collection; Sage Journals Online; SPORTDiscus with Full Text |
| subjects | Animals Binomials Chimpanzees Cognition Cognitive psychology Comparative psychology Concept Formation Experimentation Female Food Food Preferences - psychology Humans Male Mathematical functions Mathematics Memory Mental objects Mental Recall Monkeys & apes Pan troglodytes - psychology Problem Solving Psychology Retention (Psychology) Set (Psychology) Time |
| title | Chimpanzees Remember the Results of One-by-One Addition of Food Items to Sets over Extended Time Periods |
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