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为探讨判别分析技术在双任务脑力负荷评定中的意义，在完成由视觉追踪主任务和听觉Ｏｄｄｂａｌ附任务组成的双任务的过程中，同步记录了被试者多种心理生理指标。对资料分析的结果表明：追踪误差、脑事件相关电位Ｐ３波潜时和逐次心跳间期与脑力负荷关系较为密切，用多变量判别分析可以成功区分出被试者所处的脑力负荷状态，较单变量判别分析的判别正确率高。提示：多变量判别分析在脑力负荷评定中有一定意义。
In order to explore the significance of discriminant analysis in the assessment of dual-task mental workload, a variety of psychophysiological indices were recorded synchronously in the process of completing the dual task consisting of visual tracking task and auditory Oddbal task. The results of data analysis showed that the tracking error, the P3 potential and the successive heartbeat interval of the brain-related events were closely related to the mental workload, and multivariate discriminant analysis could successfully distinguish the subjects’ mental workload status from those of the subjects The discriminant accuracy of univariate discriminant analysis is high. Hint: Multivariate discriminant analysis has some significance in assessing mental stress.