Abstract
Prior expectations play an important role in the process of perception. In real life, facial expressions always appear within a scene, which enables individuals to generate predictions that affect facial expression judgments. In the present study, using event-related potentials, we investigated the influence of scene-based expectation on facial expression processing. In addition, we used a cognitive task to manipulate cognitive load to interfere with scene-based expectation. Results showed that under the condition of sufficient cognitive resources, faces elicited more negative N170 amplitudes and more positive N400 amplitudes when the emotional valence of the scenes and faces was congruent. However, in the condition of cognitive load, no such difference was observed. The findings suggested that the effect of expectation on facial expression recognition emerges during both the early and late stages of facial expression processing, and the effect is weakened when cognitive resources are occupied by unrelated tasks.
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