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Malaysian Journal of Medical Sciences
School of Medical Sciences, Universiti Sains Malaysia
ISSN: 1394-195X
Vol. 25, No. 3, 2018, pp. 103-110
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Bioline Code: mj18038
Full paper language: English
Document type: Research Article
Document available free of charge
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Malaysian Journal of Medical Sciences, Vol. 25, No. 3, 2018, pp. 103-110
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The Effect of Sex on the Electropsychological Process of Emotional Arousal Intensity
Yusoff, Nasir; Anuar, Nik NurAzhani & Reza, Mohammed Faruque
Abstract
Background: Sex is a psychobiological factor that is important in the process of emotion.
This study determines the effect of sex on the electropsychological process of various intensities of
emotional arousal.
Methods: In the Event-related Potential (ERP) session, electroencephalographic (EEG)
data was recorded for 90 participants, 60% of whom were females. The participants responded to
30 universal emotional pictures, randomly chosen from the International Affective Picture System
(IAPS), which were classified as invoking high, moderate, and low intensity of emotional arousal.
Results: From the analysis of variance of two-way mixed design, the interaction between
sex and emotional intensity was observed in the occipital regions (O2), indexed by the amplitude
of P300 and N200 components. Males exhibited higher amplitude of P300 and N200 components
(in the occipital region) as responded to high and low emotional arousal stimuli than females.
Conclusion: Sex is a fundamental factor that modulates psychological states in reaction to
emotional stimuli.
Keywords
sex; evoked potentials; P300 components; emotion; emotional arousal
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