Poster B99, Sunday, March 25, 8:00-10:00 am, Exhibit Hall C
Degree of responsibility influences outcome evaluation in joint action
Janeen Loehr1, Sarah Ardell1, Dimitrios Kourtis2; 1University of Saskatchewan, Canada, 2University of Stirling, United Kingdom
People must often monitor joint action outcomes to evaluate whether their shared goals have been achieved. Recent research has shown that neural activity related to evaluating negative action outcomes is reduced when responsibility for an outcome is shared equally between two partners compared to when responsibility is held by one person alone. The current study examined whether neural activity related to negative outcome evaluation scales with the degree of responsibility people have over an outcome. Participants produced tones in alternation with a partner to produce 6-tone sequences that matched a metronome pace. Responsibility was manipulated by having participants produce 100%, 67%, 50%, or 33% of the tones for a given sequence (i.e., 6, 4, 3, or 2 of the 6 tones). Event-related potentials were measured in response to feedback indicating whether or not the sequence correctly matched the metronome pace. Both the feedback-related negativity and the P3a were reduced for low-responsibility conditions (50% and 33%) compared to high-responsibility conditions (100% and 67%). These results indicate that greater responsibility over a joint task is associated with more negative evaluation of unfavourable joint outcomes.
Topic Area: PERCEPTION & ACTION: Other