2013 Fiscal Year Final Research Report
Value-based decision making in common marmoset
| Project/Area Number |
24700416
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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 |
Fusional basic brain science
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| Research Institution | University of Tsukuba (2013)
独立行政法人国立精神・神経医療研究センター (2012) |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | コモンマーモセット / 認知機能 / 動機付け / 欲求 / 意志決定 |
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| Research Abstract |
While the value of consumable rewards increase if animals get hungry and thirsty, it is still unclear how the satiety state affect the preference of consumable goods, and hence how choice behaviors are driven. To address this issue, I examine the choice behavior of six marmoset monkeys (Callithrix jacchus) for consumable rewards. I measured their choices and preferences of foods in each monkey in different hunger levels. Each monkey showed stochastic choices in the sated condition frequently. However, the choice stochasticity dramatically decreased when they were hungry. In addition, preferences of each food items appeared to be stable between different satiety levels. These evidences suggested that preferences are not inconsistent among different satiety level, but monkeys behave less stochastic as they become hungrier.
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