Multiple P3s to Emotional Stimuli and Their Theoretical Significance

摘要: Event-related potentials (ERPs) were recorded to both predictive (consonant-vowel-consonant) and feedback (picture) stimuli as subjects learned associations between these stimuli. The consonantvowel-consonants (CVCs) selected for lack of emotional content while the pictures (PICs) varied in value (Learning Group; N=20). A second group was exposed same CVC-PIC but required only count number different CVCs PICs (Counting principal components analysis with varimax rotation performed on ERPs revealed multiple late positive (P3 P4) a slow wave (SPW). In groups, P3 P4 factors learning had larger SPW than counting group, disconfirmed predictions elicited P4s confirmed predictions. For CVC stimuli, increased relationships. From similar scalp temporal distributions P4, well their functional similarity, it concluded that two reflect neural process which is activated by One possible function this suggested.