Poster C8, Sunday, March 26, 5:00 – 7:00 pm, Pacific Concourse
Differential neural outcome processing of monetary and non-monetary feedback: a comparison of college drinkers and non-drinkers
Heather E. Soder1, Geoffrey F. Potts1; 1University of South Florida
Risk-takers tend to ignore potential punishments when making decisions and experience a reduced Feedback-Related Negativity (FRN), an event-related potential component thought to index a reward prediction error in the anterior cingulate cortex. However, it is unclear if risk-takers exhibit an attenuated FRN to punishments other than monetary loss. Fifty participants completed counterbalanced passive reward and punishment prediction tasks. The reward task presented participants with a reward ($1) or a withheld reward ($0) that was fully predicted or unpredicted, while the punishment task similarly delivered punishment (an aversive noise burst) or a withheld punishment (silence). ERPs in response to task feedback were compared across drinkers and non-drinkers (past month). On the reward task, the drinking group displayed an enhanced positivity to unexpected rewards and a reduced negativity to withheld rewards, while non-drinkers exhibited a comparably reduced positivity to rewards and enhanced negativity to non-rewards. On the punishment task, a similar positivity to unexpected punishments was observed for both groups, but drinkers had a comparably reduced negativity to withheld punishments (silence). These results suggest that while drinkers may be hypersensitive to monetary rewards and hyposensitive to monetary punishments, this finding may not generalize to non-monetary outcomes. These findings may reflect anterior cingulate cortex input from two separate motivational systems – an appetitive system and an aversive system – with independent impacts on outcome processing.
Topic Area: ATTENTION: Other