The influence of contextual reward statistics on risk preference
Rigoli, F; Rutledge, RB; Dayan, P; Dolan, RJ
Neuroimage , 128 pp. 74-84. (2016)
2016-03
Context dramatically affects value-based choice
ventral tegmental area/substantia nigra VTA/SN
ventral striatum VST
reward prediction error RPE
Previous observations have shown that the degree of behavioural loss aversion is connected with the individual strength of VST activation for gains compared to losses
Substantial evidence implicates the anterior insula in representing
stimulus salience as activity in this region can increase for both reward
and punishment
"In sum, our findings show that choice behaviour adapts to the temporal contextual reward distribution and that VTA/SN response is linked with this adaptation process. This is in line with evidence that human preferences are often inconsistent across situations, but at the same time suggests such inconsistencies might be adaptive to environmental demands. This raises an intriguing possibility that syndromes characterized by dysfunctional decision-making, such as drug abuse and mood and anxiety disorders, might be linked to impairments in adapting choice strategies to context."
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