Center of Mental Health Education and Research, Jiangxi Normal University, Nanchang, People's Republic of China.
Department of Psychology, Jiangxi Normal University, Nanchang, People's Republic of China.
Cogn Emot. 2020 Sep;34(6):1271-1283. doi: 10.1080/02699931.2020.1726291. Epub 2020 Feb 11.
The current study investigated how sad expressions during encoding affected recognition of facial identity in visual working memory (WM) and its electrophysiological correlates. Event-related potentials were obtained from 36 individuals during a delayed face discrimination task. The hit (correctly recognising studied faces) rates, correct rejection (CR: correctly rejecting unstudied faces) rates, sensitivity d' (discrimination power of face identity recognition), and N170 (150-200 ms), the vertex positive potential (VPP; 150-200 ms), N250 (250-300 ms), P3b (350-450 ms), and late positive potential (LPP; 550-800 ms) amplitudes elicited by the neutral probe faces (previously encoded with sad and happy expressions) during hits and CR conditions were analysed. The participants showed lower hits and CRs and therefore had a lower discrimination power for facial identity preceded by sad expressions compared to happy expressions. For hits, neutral probe faces previously encoded with sad expressions exhibited increased N170, VPP, N250, P3b and LPP amplitudes compared to amplitudes following encoding with happy expressions. For correct rejections, the ERP effect of sad/happy expressions was absent. These results indicate that sad expressions during encoding attenuated the recognition of facial identity in visual WM. The reduced facial identity recognition for previously encoded sad expressions may be associated with increased early structural encoding, more late attention and perceptual resource engagement.
当前研究考察了在编码过程中表达的悲伤情绪如何影响视觉工作记忆（WM）中面部身份识别的识别及其电生理相关性。在延迟面孔辨别任务中，从 36 个人获得了事件相关电位。击中（正确识别学习过的面孔）率、正确拒绝（CR：正确拒绝未学习的面孔）率、d'（面孔身份识别的辨别力）和 N170（150-200ms）、顶点正电位（VPP；150-200ms）、N250（250-300ms）、P3b（350-450ms）和晚期正电位（LPP；550-800ms）的振幅，由中性探针面孔（先前用悲伤和快乐表情编码）在击中条件和 CR 条件下引发。参与者的命中率和 CR 较低，因此与快乐表情相比，悲伤表情前置的面部身份识别辨别力较低。对于命中，与快乐表情编码后的 N170、VPP、N250、P3b 和 LPP 振幅相比，先前用悲伤表情编码的中性探针面孔表现出增加的 N170、VPP、N250、P3b 和 LPP 振幅。对于正确拒绝，悲伤/快乐表情的 ERP 效应不存在。这些结果表明，在编码过程中表达的悲伤情绪会削弱视觉 WM 中面部身份的识别。对于先前编码的悲伤表情，面部身份识别的减少可能与早期结构编码增加、后期注意力和感知资源参与增加有关。
