| Project/Area Number |
26885039
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Experimental psychology
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2014-08-29 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | Comparative cognition / Social cognition / Nonhuman primates / comparative cognition / social cognition / nonhuman primates |
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| Outline of Final Research Achievements |
The purpose of this project was to see how other species socially evaluate individuals based on the latters' interactions with third parties. We showed that dogs that see somebody refuse to help their owner solve a task, avoid taking food from the non-helper. We have also shown that two species of monkeys - squirrel monkeys and capuchins, show a bias against third parties who fail to reciprocate. Unlike capuchins, however, squirrel monkeys also showed a positive preference for reciprocating third-party exchangers. Interestingly, after witnessing a non-reciprocal exchange, capuchins are less likely to wait for pieces of food from a non-reciprocator (delay of gratification), but they prefer humans who give food to their own species rather than another species. Our results suggest that social evaluations in different species may reflect different mechanisms.
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