Abstract
目的 探讨海拔2 850m的高原低氧条件下45h完全睡眠剥夺(sleep deprivation,SD)期间,脑力疲劳对个体外显操作自我监控的元认知能力的影响.方法 7名20～22岁的健康男性青年,在完全睡眠剥夺条件下,每隔6h进行1次元认知能力测验,具体内容为一组难度水平不同的系列加法任务.结果①通过总体分析,被试完成各难度水平任务的正确率与其主观评判等级之间的相关为0.63(P ＜0.01),表明这二者具有较度的一致性;②对SD过程中各次测验的三项校验指标,即确信等级与正确率二者之间的相关系数、校验曲线的斜率和最高确信等级的正确率,进行分析,结果表明,这三项指标在各次测验之间均无显著性差异(P >0.05),其F值分别为F7, 43≈0.455、F7, 43≈0.646和F7,43≈1.001.结论个体自我监控的元认知能力作为人体一种相对独立的能力,在海拔不超过2 850m,SD不超过45h的时间内,其基本保持完好,可采用主观报告的方法对脑力疲劳程度进行量化。
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