Rhesus Monkeys Have a Counting Ability and Can Count from One to Six
Counting ability is one of the many aspects of animal cognition and has enjoyed great interest over the last couple of decades. The impetus for studying counting ability in nonhuman animals has likely come from more than a general interest in animal cognition, as the analysis of animal abilities amp...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Brain Sciences |
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| Online Access: | https://www.mdpi.com/2076-3425/11/8/1011 |
| _version_ | 1797524488419540992 |
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| author | Weiming Sun Baoming Li Chaolin Ma |
| author_facet | Weiming Sun Baoming Li Chaolin Ma |
| author_sort | Weiming Sun |
| collection | DOAJ |
| description | Counting ability is one of the many aspects of animal cognition and has enjoyed great interest over the last couple of decades. The impetus for studying counting ability in nonhuman animals has likely come from more than a general interest in animal cognition, as the analysis of animal abilities amplifies our understanding of human cognition. In addition, a model animal with the ability to count could be used to replace human subjects in related studies. Here we designed a behavioral paradigm to train rhesus monkeys to count 1-to-6 visual patterns presented sequentially with long and irregular interpattern intervals on a touch screen. The monkeys were required to make a response to the sixth pattern exclusively, inhibiting response to any patterns appearing at other ordinal positions. All stimulus patterns were of the same size, color, location, and shape to prevent monkeys making the right choice due to non-number physical cues. In the long delay period, the monkey had to enumerate how many patterns had been presented sequentially and had to remember in which ordinal position the current pattern was located. Otherwise, it was impossible for them to know which pattern was the target one. The results show that all three monkeys learned to correctly choose the sixth pattern within 3 months. This study provides convincing behavioral evidence that rhesus monkeys may have the capacity to count. |
| first_indexed | 2024-03-10T08:58:08Z |
| format | Article |
| id | doaj.art-19af2c933879486db08d0814db252a41 |
| institution | Directory Open Access Journal |
| issn | 2076-3425 |
| language | English |
| last_indexed | 2024-03-10T08:58:08Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Brain Sciences |
| spelling | doaj.art-19af2c933879486db08d0814db252a412023-11-22T06:58:43ZengMDPI AGBrain Sciences2076-34252021-07-01118101110.3390/brainsci11081011Rhesus Monkeys Have a Counting Ability and Can Count from One to SixWeiming Sun0Baoming Li1Chaolin Ma2Center for Neuropsychiatric Disorders, Institute of Life Science, Nanchang University, Nanchang 330031, ChinaCenter for Neuropsychiatric Disorders, Institute of Life Science, Nanchang University, Nanchang 330031, ChinaCenter for Neuropsychiatric Disorders, Institute of Life Science, Nanchang University, Nanchang 330031, ChinaCounting ability is one of the many aspects of animal cognition and has enjoyed great interest over the last couple of decades. The impetus for studying counting ability in nonhuman animals has likely come from more than a general interest in animal cognition, as the analysis of animal abilities amplifies our understanding of human cognition. In addition, a model animal with the ability to count could be used to replace human subjects in related studies. Here we designed a behavioral paradigm to train rhesus monkeys to count 1-to-6 visual patterns presented sequentially with long and irregular interpattern intervals on a touch screen. The monkeys were required to make a response to the sixth pattern exclusively, inhibiting response to any patterns appearing at other ordinal positions. All stimulus patterns were of the same size, color, location, and shape to prevent monkeys making the right choice due to non-number physical cues. In the long delay period, the monkey had to enumerate how many patterns had been presented sequentially and had to remember in which ordinal position the current pattern was located. Otherwise, it was impossible for them to know which pattern was the target one. The results show that all three monkeys learned to correctly choose the sixth pattern within 3 months. This study provides convincing behavioral evidence that rhesus monkeys may have the capacity to count.https://www.mdpi.com/2076-3425/11/8/1011countingmonkeysnumerical competenceanimal cognition |
| spellingShingle | Weiming Sun Baoming Li Chaolin Ma Rhesus Monkeys Have a Counting Ability and Can Count from One to Six Brain Sciences counting monkeys numerical competence animal cognition |
| title | Rhesus Monkeys Have a Counting Ability and Can Count from One to Six |
| title_full | Rhesus Monkeys Have a Counting Ability and Can Count from One to Six |
| title_fullStr | Rhesus Monkeys Have a Counting Ability and Can Count from One to Six |
| title_full_unstemmed | Rhesus Monkeys Have a Counting Ability and Can Count from One to Six |
| title_short | Rhesus Monkeys Have a Counting Ability and Can Count from One to Six |
| title_sort | rhesus monkeys have a counting ability and can count from one to six |
| topic | counting monkeys numerical competence animal cognition |
| url | https://www.mdpi.com/2076-3425/11/8/1011 |
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