The effect of pre-existing memory representations on repetition-related N250r and N400

Influence of lag length on repetition priming in emotional stimuli:ERPevidence

“…The grand‐average waveforms were collapsed separately for correctly classified normal and transposed characters in each case. Similar to previous studies, eye artifact correction was accomplished using a semi‐automatic procedure before averaging. Following correction, trials contaminated by eye blinks or movements that exceeded ± 75 μV were excluded using a PCA‐based algorithm before collapsing .…”

“…Another important factor for repetition priming effect is the pre‐existing memory representation. For instance, the effect was greater for words vs pseudo‐words, famous vs unfamiliar faces, meaningful vs meaningless symbols, and possible vs impossible figures . These findings suggest a greater repetition priming effect for stimuli with pre‐existing memory representations over those without.…”

“…For instance, the study conducted by Swick and Knight revealed that repetition‐related waveforms were hemispherically different between words and nonwords. Similarly, the N250r and N400 were much greater for pre‐experimentally famous/familiar faces and experimentally learned faces, compared to unfamiliar faces, reflecting that these variations are based purely upon whether a face holds a status of pre‐existing memory representation …”

“…Previous research has demonstrated that the lag length between twice‐presented (ie, unprimed and primed) trials, pre‐existing memory representation, and the emotional valence of stimuli are potentially influential in generating a repetition priming effect . For instance, Swick and Knight confirmed that the repetition priming effect in words decreased from immediate repetition, in which no item was intervened when a stimulus was re‐presented, to delayed repetition, in which 1‐3 or 9‐19 items were intervened.…”

“…It is well‐known that priming is the subsequently unconscious or unintentional retrieval of information related to previous experiences . Repetition priming, one type of priming, refers to the facilitation in the processing of a repeatedly presented stimulus (ie, higher accuracy in identifying the stimulus and faster response for it) …”