论文部分内容阅读
来自记忆、注意和决策等领域的大量研究发现,在加工情绪刺激时老年人具有正性情绪偏向或负性情绪规避的特点.本研究采用oddball变式,将情绪面孔图片作为分心刺激呈现.实验过程中记录被试脑电,考察不同情绪效价对脑电波的影响,同时考察老年人在非任务相关条件下情绪加工和情绪调节的时间进程.研究发现,在相对早期时间窗口(270~460 ms),年轻组脑电不受情绪效价影响,而老年组中悲伤情绪面孔较之快乐和中性情绪面孔引发了一个更大的正成分(P3a).在晚期时间窗口(500~850 ms),年轻组中悲伤情绪面孔吸引了被试更多注意并引发了一个更大的正性慢波.相反,老年组在晚期加工阶段,情绪效价效应消失.研究揭示了老年人和年轻人在加工非任务相关的情绪刺激时存在的时间进程差异,年龄相关的正性情绪效应发生在晚期时间窗口,表现为年轻组的负性情绪偏向和老年组的无情绪偏向.研究结果为社会情绪选择理论提供了来自脑电数据的支持.
A large number of studies from the fields of memory, attention and decision-making found that the elderly have the characteristics of positive emotions or negative emotions in the processing of emotional stimuli.In this study, the oddball variant was used to present emotional faces as distracting stimuli. During the experiment, the EEGs were recorded and the effects of different emotional titers on EEG were investigated, and the time course of emotional processing and emotional regulation of the elderly under non-task-related conditions was also investigated. The results showed that in the relatively early time window (270 ~ 460 ms), while in the young group, the EEG was not affected by the emotional titers, while the sad group in the elderly group caused a larger positive component (P3a) than the happy and neutral face.In the late time window (500-850 ms), the sad mood in the young group attracted more attention and led to a greater positive slow wave.On the contrary, the emotion-valence effect disappeared in the elderly group in the late processing stage.The study revealed that the elderly and young The differences of the time course in the processing of non-task-related emotional stimuli were observed in the late time window, showing the negative emotional bias and the old age-related positive emotions No group of emotional bias. The results choice theory provides support from EEG data for the public mood.