心理疲劳对认知控制和动机影响的外周生理机制  

The Influence of Mental Fatigue on Cognitive Control and Motivation in the Research on Peripheral Physiological Mechanisms

作　　者：朱昭红[1] 马骁[1] 张俊峰[1] 

机构地区：[1]西安体育学院心理学系,西安710068

出　　处：《心理与行为研究》2013年第6期752-758,共7页Studies of Psychology and Behavior

基　　金：陕西自然科学基金项目(2011JQ4041);国家自然科学基金项目(30970912)的资助

摘　　要：检测心理疲劳进程中的认知控制变化特点和动机的作用,以及所伴随的自主神经变化特点。心理疲劳由1小时持续完成的Flanker任务引发,之后采用社会性比较和物质奖励激励被试继续完成另20分钟该任务,期间记录了被试厌恶继续完成该任务的水平,行为指标和心率变异性。结果发现,随着时间增加厌恶继续完成任务评分增加;反应时变化不显著,错误率显著增高,给出激励后降低,而且错误率上兼容效应显著;心率变异性时域和频域差异显著。心理疲劳之后表现为交感神经激活增加而副交感神经激活减弱,被试错误率增加,行为绩效降低,源于疲劳造成了被试行为抑制能力下降,给出奖励之后副交感神经再次激活,抑制能力得到部分改善。The effects of mental fatigue on cognition control and the accompanying changes in autonomic nervous were as- sessed. Subjects performed a Flanker task for 1 h without rest, and were motivated to continue task for 20 minutes. Subjective levels of fatigue, performance measures and HRV were recorded. From the results, we found that sub- jects fatigue ratings increased, suggesting that the 1 h of task performance resulted in an increase in mental fatigue. Misses increased with time on task. Time domain measures of HRV and LF increased, while HF and LF/HF recov- ered to baseline with time on task. Time domain measures of HRV and HF increased, while LF decreased to base- line after motivated. Thus, we speculate that subjects with more sympathetic-and less parasympathetic-related mod- ulation will be less capable of inhibiting responses because of mental fatigue, After motivated, parasympathetic-re- lated modulation is hypoactive and as a result performance increase.

关 键 词：心理疲劳 认知控制 动机 外周生理 心率变异性 

分 类 号：B842.1[哲学宗教—基础心理学]