Effect of Emotion States on the Updating Function of Working Memory.

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In recent years, the interaction between emotion and working memory has been investigated with mixed results. Yet, few neurophysiological studies systematically investigated the effect of emotion states on the updating function of working memory that is a core part of executive functioning. Executive functioning has also been identified as cognitive function, which plays an important role in everyday life and even be a predictor of higher-level cognitive function. Here, we studied the effect of emotions on the updating function of working memory. 16 subjects were recruited to participate in verbal working memory task, and 14 in spatial working memory task. Pictures from International Affective Picture System(IAPS) were employed to evoke positive, negative and neutral states, and 4 digits or 4 spatial positions instructions created verbal or spatial working memory tasks. Combining event-related potentials(ERPs) and repeated measures ANOVA methods, the results showed that the updating time significantly increased in the positive state, and P3 amplitude was significantly lower than that of the neutral state in verbal working memory task; while in spatial working memory task, the updating time significantly increased in the negative state, but there was no significant difference in ERP components. These findings suggest that the updating function of verbal working memory may be affected by the positive state, while that of the spatial working memory may be affected by the negative state.