Preparing the heart, eye, and brain: Foreperiod length effects in a nonaging paradigm
Preparing the heart, eye, and brain: Foreperiod length effects in a nonaging paradigm
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DOI：
10.1111/1469-8986.3510090
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发表时间：
1998-01-01
期刊：
影响因子：
3.7
通讯作者：
Steinhauer, SR
中科院分区：
文献类型：
--
作者：
Jennings, JR;Van der Molen, MW;Steinhauer, SR
心理生理上的“预备性”反应可能取决于对刺激何时发生的集中预期，也可能不取决于。在一项简单反应时间(RT)任务的前期固定或不可预测的试验中，研究了心率、瞳孔直径和脑电位的变化。试验还包括由早期自发发生的心理生理变化触发对快速运动反应的刺激。32名大学年龄的志愿者按性别平均参与了这项实验。通过使用非老化的早期阶段来降低预期，消除了短暂的刺激前心理生理反应，但未能消除早期阶段的缓慢变化--心率减慢、瞳孔扩张和皮质表面负性。生理变化触发反应刺激对反应时无影响。早期的心理生理变化以及这些变化与RT之间的相关性普遍较低。这一结果与制备的多工艺观点一致。
Psychophysiological "preparatory" responses may or may not depend on a focused expectation of when a stimulus will occur. Changes in heart rate, pupillary diameter, and brain potentials were examined during trials in which foreperiod of a simple reaction time (RT) task was fixed or unpredictable. Trials were also included in which stimuli for the speeded motor reaction were triggered by psychophysiological changes occurring spontaneously in the foreperiod. Thirty-two college-aged volunteers equally divided by gender participated in the experiment. Reducing expectancy, by using nonaging foreperiods, eliminated transient prestimulus psychophysiological responses but failed to eliminate slow changes over the foreperiod-slowing of heart rate, dilation of the pupil, and cortical surface negativity. Triggering the reaction stimulus by physiological changes did not influence RT. Correlations between psychophysiological changes in the foreperiod and between these changes and RT were generally low. The results were consistent with a multiprocess view of preparation.