Modulation of Neutral Face Evaluation by Laterally Presented Emotional Expressions

The present study examined hemispheric asymmetries in emotional processing. 40 right-handed women were presented sequences of Happy, Sad, and Disgusted facial expressions to their left and right visual fields followed by a Neutral face presented to ipsi- or contralateral visual field. After Happy sequences, Neutral faces were rated as significantly more pleasant than after Sad sequences. In respect to hemispheric asymmetries, the analyses gave a significant effect of visual field only for Sad sequences. The ratings of Neutral faces were significantly more positive after presentations of Sad sequences to the left than to the right visual field. These modulational effects are suggested to support recent findings of hemispheric asymmetries of human emotions.

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