A key role for stimulus-specific updating of the sensory cortices in the learning of stimulus-reward associationsvan den Berg, B., Geib, B. R., San Martin, R. & Woldorff, M. G., Feb-2019, In : Social Cognitive and Affective Neuroscience. 14, 2, p. 173–187 15 p.
Research output: Contribution to journal › Article › Academic › peer-review
Successful adaptive behavior requires the learning of associations between stimulus-specific choices and rewarding outcomes. Most research on the mechanisms underlying such processes has focused on subcortical reward-processing regions, in conjunction with frontal circuits. Given the extensive stimulus-specific coding in the sensory cortices, we hypothesized they would play a key role in the learning of stimulus-specific reward associations. We recorded electrical brain activity (EEG) during a learning-based, decision-making, gambling task where, on each trial, participants chose between a face and a house and then received feedback (gain or loss). Within each 20-trial set, either faces or houses were more likely to predict a gain. Results showed that early feedback processing (~200-1200ms) was independent of the choice made. In contrast, later feedback processing (~1400-1800ms) was stimulus-specific, reflected by decreased alpha power (reflecting increased cortical activity) over face-selective regions. For winning-versus-losing after a face choice, but not after a house choice. Finally, as the reward association was learned in a set, there was increasingly stronger attentional bias towards the more likely winning stimulus, reflected by increasing attentional-orienting-related brain activity and increasing likelihood of choosing that stimulus. These results delineate the processes underlying the updating of stimulus-reward associations during feedback-guided learning, which then guides future attentional allocation and decision making.
|Number of pages||15|
|Journal||Social Cognitive and Affective Neuroscience|
|Early online date||20-Dec-2018|
|Publication status||Published - Feb-2019|
- ANTERIOR CINGULATE CORTEX, BASAL GANGLIA CIRCUITS, DECISION-MAKING, ATTENTION, REPRESENTATION, PERCEPTION, OBJECT, FMRI, PREDICTION, SIGNATURES