Neural computations on social decision making : theory and experimental validations

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We conducted studies with an ultimate aim of elucidating neural computations for social decision making. While we made several achievements towards the aim, here we summarize the result of a most central study. Using human fMRI experiment, combined with so-called model-based analysis, we investigated brain functions for value-based decision making, comparing two situations ; when the subject makes value-based decisions for their self reward and when the subjects predicts what value-based decision another person would make, when the other person is in the same situation for themselves. We found that the ventromedial frontal cortex plays a central role in simulating the other's value-based decision making process.