2013 Fiscal Year Final Research Report
Analysis of individual differences in prosociality from evolutionary psychology and behavior genetics
| Project/Area Number |
23730577
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Social psychology
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| Research Institution | Yasuda Women's University (2012-2013)
Kyoto University (2011) |
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Principal Investigator |
HIRAISHI Kai 安田女子大学, その他部局等, 准教授 (50343108)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 向社会性 / 利他性 / 進化 / 遺伝 / 個人差 / 双生児法 |
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| Research Abstract |
We examined the origin of individual differences in human prosociality from evolutionary and genetic point of views. We conducted a dictator game and ultimatum game with a Japanese adult twin sample. It was shown that the amount of offer on the two games were not greatly affected by genetics since the within pair correlations were not different between the identical twins and the fraternal twins. On the other hand, the within-pair correlations of minimal acceptable amount on the ultimatum game were greater for the identical twin pairs, suggesting genetic influences. We also had two experiments in which undergraduates participated in both of the dictator game and ultimatum games. It was shown that the difference between the offers on the two games was related to manipulative traits, such as Machiavellianism. Also, it was shown that those who changed the offer between the two games were more likely to choose the dictator game when they could choose which game to play.
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[Presentation] Heritability of Decisions and Outcomes on Public Goods Games2011
Author(s)
Hiraishi, K., Shikishima, C., Takahashi, Y., Yamagata, S., Sugimoto, Y., and Ando, J
Organizer
Human Behavior and Evolution Society 23th Annual Conference
Place of Presentation
France, Montpellier
Year and Date
20110000
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