Direct Electrophysiological Mapping of Shape-Induced Affective Perception.

Direct Electrophysiological Mapping of Shape-Induced Affective Perception.
Neural Plast. 2018;2018:9795013
Authors: Li Y, Ding Q, Zhao Y, Bu Y, Tang X, Wang P, Zhang G, Chen M, Liang P
Abstract
Visual information may convey different affective valences and induce our brain into different affective perceptions. Many studies have found that unpleasant stimuli could produce stronger emotional effects than pleasant stimuli could. Although there has been a notion that triangle is perceived as negative and circle as positive, there has been no systematic study to map the degrees of valence of shapes with different affective perceptions. Here, we employed four shapes (ellipse, triangle, and line-drawn happy and angry faces) to investigate the behavior and electrophysiological responses, in order to systematically study shape-induced affective perception. The reaction time delay and the event-related potential (ERP), particularly the early ERP component, were applied to find the associations with different affective perceptions. Our behavioral results showed that reaction time for angry face was significantly shorter than those for the other three types of stimuli (p < 0.05). In the ERP results, P1, N1, P2, and N2 amplitudes for angry face were significantly larger than those for happy face. Similarly, P1, N1, P2, and N2 amplitudes for triangle were significantly larger than those for ellipse. Particularly, P1 amplitude in the parietal lo...

Source: Neural Plasticity - September 5, 2018 Category: Neurology Authors: Li Y, Ding Q, Zhao Y, Bu Y, Tang X, Wang P, Zhang G, Chen M, Liang P Tags: Neural Plast Source Type: research