Individual differences in automatic emotion regulation affect the asymmetry of the LPP component

The main goal of this study was to investigate how automatic emotion regulation altered the hemispheric asymmetry of ERPs elicited by emotion processing. We examined the effect of individual differences in automatic emotion regulation on the late positive potential (LPP) when participants were viewi...

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Bibliographic Details
Published in:PloS one 2014-02, Vol.9 (2), p.e88261-e88261
Main Authors: Zhang, Jing, Zhou, Renlai
Format: Article
Language:English
Subjects:
Adolescent
Adult
Arousal
Arousal - physiology
Asymmetry
Automatic control
Behavior
Biology
Control
Dominance
Electrodes
Electroencephalography - methods
Emotions
Emotions - physiology
Event-related potentials
Female
Hemispheric laterality
Humans
Hypotheses
Individuality
Inhibition (Psychology)
Laboratories
Medicine
Photic Stimulation
Pictures
Psychology
Social and Behavioral Sciences
Studies
Young Adult
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Summary:The main goal of this study was to investigate how automatic emotion regulation altered the hemispheric asymmetry of ERPs elicited by emotion processing. We examined the effect of individual differences in automatic emotion regulation on the late positive potential (LPP) when participants were viewing blocks of positive high arousal, positive low arousal, negative high arousal and negative low arousal pictures from International affect picture system (IAPS). Two participant groups were categorized by the Emotion Regulation-Implicit Association Test which has been used in previous research to identify two groups of participants with automatic emotion control and with automatic emotion express. The main finding was that automatic emotion express group showed a right dominance of the LPP component at posterior electrodes, especially in high arousal conditions. But no right dominance of the LPP component was observed for automatic emotion control group. We also found the group with automatic emotion control showed no differences in the right posterior LPP amplitude between high- and low-arousal emotion conditions, while the participants with automatic emotion express showed larger LPP amplitude in the right posterior in high-arousal conditions compared to low-arousal conditions. This result suggested that AER (Automatic emotion regulation) modulated the hemispheric asymmetry of LPP on posterior electrodes and supported the right hemisphere hypothesis.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0088261