Hemispheric differences in brain activity related to the recognition of emotional expressions by 5‐year‐old children

Event‐related potentials were recorded while 5‐year‐olds (N= 44) watched slides of a woman posing happy, angry, and fearful expressions. In 1 session, children were instructed to press a button whenever they saw the happy face, and in another, they were instructed to respond to the fearful face. Four event‐related potential components (N170, P280, N400, and P700) differed in amplitude, latency, or both at right compared to left hemisphere recording sites, and hemispheric differences were present at both anterior (F3, F4) and posterior (T5, T6) recording sites. Hemispheric differences in the amplitude of the P700 were influenced by the task instructions: The P700 was larger at the right posterior than the left posterior recording site for nontarget, but not for target, faces. In contrast, hemispheric differences in the components preceding the P700 were not affected by task instructions. These results suggest that hemispheric differences in brain activity related to recognition of expressions are modulated...

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