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该文旨在探讨内、外倾者在三种不同难度心算时，心率、Ｔ波幅度、呼吸频率变化的差异。通过艾森克个性问卷筛选出１５名内倾者和１５名外倾者作为被试，让其完成三种不同难度的心算任务。实验结果表明，心算时两组被试心率均显著上升，内倾组上升幅度大于外倾组；Ｔ波幅度显著降低，内倾组降低幅度大于外倾组但差异不显著；呼吸频率显著上升，但两组上升幅度差异不显著。此外，从心率变化上看，两组被试对心算均表现出适应，内倾组的适应速度比外倾组慢。本实验表明，焦虑性精神紧张比智力操作性精神紧张对心率的影响更大。
The purpose of this paper is to explore the differences of heart rate, T-wave amplitude and respiratory rate among three kinds of difficult mental arithmetic. Through the Eysenck personality questionnaire, 15 introverts and 15 extraverts were selected as subjects to complete three different difficult mental arithmetic tasks. The experimental results showed that the heart rate of both groups increased significantly at the time of mental arithmetic, the amplitude of increase was more than that of the circumcision group, the amplitude of T wave was significantly decreased, the decrease of the inpuncture group was greater than that of the circumcision group, but the difference was not significant; There was no significant difference in the rate of increase between groups. In addition, changes in heart rate point of view, the two groups of participants were shown to adapt to the calculation of mental arithmetic, the adaptive speed of the inclined group was slower than the external group. This experiment shows that anxiety stress is more influential on heart rate than intellectual operational stress.