Effects of Positive Moods with Different Arousal Levels on the Lexical Decision Process: An Event-related Potential Study

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  • MORIYA Hiroki
    Japan Society for Promotion of Sciences Graduate School of Integrated Arts and Sciences, Hiroshima University
  • TAKEICHI Jun
    Graduate School of Integrated Arts and Sciences, Hiroshima University
  • NITTONO Hiroshi
    Graduate School of Integrated Arts and Sciences, Hiroshima University

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  • 覚醒度の異なるポジティブ気分が語彙判断に及ぼす効果:事象関連電位を用いた検討
  • カクセイド ノ コトナル ポジティブ キブン ガ ゴイハンダン ニ オヨボス コウカ : ジショウ カンレン デンイ オ モチイタ ケントウ

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Positive moods are thought to promote the activation of semantic representation. Although recent studies have shown that the effects of mood on cognitive processes are influenced by mood arousal, it has thus far been unclear whether high- and low-arousal positive moods differently influence the lexical decision process. In this study, 24 university students performed a lexical decision task under high-arousal positive, low-arousal positive, and neutral moods, which were induced by sound clips. The amplitudes of the N400 elicited by word and pseudoword stimuli were greater under high-arousal positive moods than under neutral moods. The differences between low-arousal positive and neutral moods were not significant. These results suggest that a certain level of mood arousal is required for positive mood to promote semantic processing.

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