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Influence of lag length on repetition priming in emotional stimuli: ERP evidence
Delin Zhang1, Aiqing Nie2, Zhixuan Wang3
1Department of Anesthesiology, The First Affiliated Hospital of Zhejiang University Medical College, Hangzhou, China.
Background:
Previous studies have demonstrated both behavioral and neural evidence for the potential mediations of lag length and pre-existing memory representation on repetition priming. However, such mediations on emotional stimuli have not been described.
Methods:
The current experiment intended to disentangle lag length from pre-existing memory representation. A lexical decision task was performed, in which different emotional characters (either normal or transposed) were re-presented either immediately or delayed.
Results:
In immediate repetition, one early and two late (ie, N400 and late positive complex) repetition-related event-related potential (ERP) effects were elicited, but these were not sensitive to pre-existing memory representation. The delayed repetition case merely observed the N400.
Conclusion:
These results suggest that the repetition-related priming effect is neutrally sensitive to lag length. Emotional information potentially exerts early and later influences in the processing underlying stimuli memory.
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