The Impact Of Cue Valence And Feedback Delay On Feedback-related Negativity (FRN)

Humans use external feedback to learn whether his/her action is propriety,and then adjust behavior for the future.Feedback-related negativity(FRN) has identified a negative deflection at fronto-central recording sites that peaks approximately 200ms following feedback presentation and larger following the presentation of negative feedback than positive feedback.Our experiments utilize event-related potentials(ERPs) to investigate how FRN are affected by expectation and delayed time.Besides probability of outcome,the way of representation also impact on expectation.In Study 1,either positive or negative cue will be presented in the beginning of the trial,which elicit different expectation.In Study 2,feedback will be presented in different times(500ms,1500ms,2500ms) after gambling choose.The results indicated that:(1) From behavior data,the different way of representation affects choose bias.Participants appeared more confidence that believe they could win in positive situation. (2) In stage of cue,both the way of representation and probability affect decision.The anterior cingulate cortex(ACC) can function as a pre-warning system that alerts the brain to get ready for future events.(3) Brain depends on affective-motivation to evaluate the outcomes not only classify outcomes into two categories simply.The degree of instruction from feedback can affect FRN amplitude.(4) The variety of delayed time interval between chooses and feedback appeared definitely makes FRN changed because it induces the change of expectation.