Lipp Ottmar V, Kaplan Daniel M, Purkis Helena M
School of Psychology, University of Queensland, Qld 4072, Australia.
Neurosci Lett. 2006 Dec 1;409(2):124-7. doi: 10.1016/j.neulet.2006.09.025. Epub 2006 Sep 28.
Previous research has been interpreted to suggest that the startle reflex mediates the RT facilitation observed if intense, accessory acoustic stimuli are presented coinciding with the onset of a visual imperative stimulus in a forewarned simple RT task. The present research replicated this finding as well as the facilitation of startle observed during the imperative stimulus. It failed, however, to find any relationship between the size of the blink startle reflex elicited by the accessory acoustic stimuli, which differed in intensity and rise time, and RT or RT facilitation observed on trials with accessory acoustic stimuli. This finding suggests that the RT facilitation is not mediated by the startle reflex elicited by the accessory acoustic stimuli.
先前的研究表明，如果在有预警的简单反应时任务中，与视觉指令刺激的开始同时呈现强烈的辅助听觉刺激，惊跳反射会介导观察到的反应时促进作用。本研究重复了这一发现，以及在指令刺激期间观察到的惊跳促进作用。然而，研究未能发现由强度和上升时间不同的辅助听觉刺激引发的眨眼惊跳反射的大小与在有辅助听觉刺激的试验中观察到的反应时或反应时促进作用之间存在任何关系。这一发现表明，反应时促进作用不是由辅助听觉刺激引发的惊跳反射介导的。
