Penzien D B, Hursey K G, Kotses H, Beazel H A
Biol Psychol. 1982 Nov-Dec;15(3-4):241-8. doi: 10.1016/0301-0511(82)90046-1.
The purpose of the present study was to examine the effects of an anticipatory stressor on three measures of cardiovascular activity: heart rate (HR), T-wave amplitude (TWA) and blood pressure (BP). Twenty-eight males were assigned to either a stress or no-stress group. All subjects reviewed a brief section of prose and then read it aloud during two sessions. The stress group was told that the reading task was a speech and that their performance would be evaluated. The no-stress group was told that the reading task was a part of the readability evaluation of the text material. Reliable increases in HR were observed during both sessions with the stress group exhibiting greater accelerations than the no-stress group. Though TWA and BP varied with periods, no reliable group differences were observed. Degree of threat or aversiveness appears to be indexed more reliably by HR changes than by changes in TWA.
心率（HR）、T波振幅（TWA）和血压（BP）。28名男性被分为应激组或无应激组。所有受试者先阅读一小段散文，然后在两个阶段大声朗读。应激组被告知阅读任务是一次演讲，其表现将被评估。无应激组被告知阅读任务是文本材料可读性评估的一部分。在两个阶段中均观察到应激组的心率可靠增加，且该组的心率加速幅度大于无应激组。虽然T波振幅和血压随时间段变化，但未观察到可靠的组间差异。与T波振幅变化相比，心率变化似乎更可靠地反映了威胁程度或厌恶程度。
