内隐情绪加工对返回抑制效应的调节

Modulation of Implicit Emotion Process on Inhibition of Return Effect

为探讨内隐情绪加工是否会对返回抑制产生影响,采用线索靶子范式,以情绪性面孔图片作为目标,要求被试完成定位任务。结果发现,行为数据和脑电数据均显示了显著的返回抑制效应;N1成分上情绪效价和线索有效性的主效应及交互作用均显著,有效线索条件下情绪目标诱发的波幅显著大于中性目标;N170成分上线索有效性主效应显著,相较于N1成分,N170成分在有效线索上波幅更小,在无效线索上波幅更大。实验结果表明返回抑制效应受到内隐情绪加工的调节,提示该效应来源于早期的知觉抑制,支持知觉抑制理论。

Inhibition of return is an inhibitory mechanism which refers to the position previously noticed showing slower response. Providing neural, positive and negative facial images as target stimulus, subjects were asked to perform detection task with ERPs technology. It was found that the data on the behavior and EEG record had significant IOR effect. According to EEG results, no effects on the component of P 1 were found. However, the effect of IOR were found on N 1 and N170. Compared with amplitude of the invalid cues, we found that the amplitude of N1 of the valid cues was larger, while the amplitude of N170 was smaller. Interestingly, there are emotion effect of N1, indicating that emotional face induced more attentional bias than neural face. More surprisingly, we found a significant interaction effect between emotion values and IOR. The simple effect showed that the amplitude of emotional face was larger than neural face. These results indicate that IOR at least partly arises from changes in perceptual process, and to a certain degree, implicit emotion process can modulate IOR.