ABSTRACT

The purpose of this study was to examine the difference of performance depending on the type of stress imposed on the task. To do so, we divided the stress imposed on the task into cognitive stress and emotional stress and investigated the impact of these stresses on the performance of cognitive task. Participants were asked to solve arithmetic problems. The cognitive stress was aroused by manipulating task difficulty, and the emotional stress was aroused by manipulating the existence of timer and the possibility of self-paced task performance. The results of behavioral experiment showed that emotional stress has negative impact on solving cognitively more demanding problems, but the emotional stress has positive affect on solving less demanding problems. The results of the ERP study showed such that the effect of emotional stress is observed in P1, P2, N400 (left occipital lobe) and the effect of cognitive stress is observed in N400 (right anterior and central lobe). Interestingly, the interaction between emotional processing and cognitive processing was observed in P2 and N400 components. These findings provide experimental evidence that psychological stress is an umbrella concept including two distinct cognitive and emotional stresses and suggest that emotional processing and cognitive processing interact with each other.

KEYWORD

Cognitive stress, Emotional stress, ERP

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