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Vol.23 No.4

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Effects of Perceptual Load on Emotional Processing: an ERP study

The Korean Journal of Cognitive and Biological Psychology / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2011, v.23 no.4, pp.583-603
https://doi.org/10.22172/cogbio.2011.23.4.007


& (2011). Effects of Perceptual Load on Emotional Processing: an ERP study. The Korean Journal of Cognitive and Biological Psychology, 23(4), 583-603, https://doi.org/10.22172/cogbio.2011.23.4.007

Abstract

We examined how the emotional processing is influenced by attentional modulation such as the level of perceptual load using event-related potentials method. On each trial, six letters were presented with a picture of IAPS in the background. Perceptual load was manipulated by varying the number of distractors that were similar to the target (no similar distractor in low load condition, five or six similar distractors in high load condition), and the valence of each picture was unpleasant or neutral. In low and high load conditions, participants first performed the letter detection go/no-go task and then performed the emotional discrimination task about a previous picture (divided attention paradigm). Only ERP data of non-target no-go trials were included in the analysis. Participants responded more quickly and more accurately at low-load condition than at high-load condition, regardless of emotional valence of a background picture. ERP results showed emotion effect both in early (90-140ms) and late (700-1000ms) windows, but showed interaction effect of emotion and perceptual load only in late window. These results suggest that the perceptual load affect the late emotional processing, not the early emotional processing.

keywords
정서처리, 자동성, 지각부담, 분할주의패러다임, ERP, emotional processing, automaticity, attentional load, divided attention paradigm, ERP

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