Filion D L, Dawson M E, Schell A M
Laboratory for Attention and Motor Performance, Andrus Gerontology Center, University of Southern California, Los Angeles 90089-0191.
Biol Psychol. 1993 Jul;35(3):185-200. doi: 10.1016/0301-0511(93)90001-o.
The present experiment examined the sensitivity of short and long lead interval startle eyeblink modification to attentional processing. Eighteen college student subjects were presented with a series of intermixed high and low pitched tones and instructed to attend to tones of one pitch and to ignore tones of the other pitch. The majority of the attended and ignored tones served as prepulses for an eyeblink-eliciting burst of white noise presented at lead intervals of 60, 120, 240 and 2000 ms following prepulse onset. Results indicate that both attended and ignored prepulses produce significant startle eyeblink modification: significant blink inhibition at the 60, 120 and 240 ms short lead intervals, and blink facilitation at the 2000 ms long lead interval. In addition, compared with the ignored prepulse, the attended prepulse produced significantly greater blink inhibition at the 120 ms lead interval as well as significantly greater blink facilitation at the 2000 ms lead interval. These results suggest that both short and long lead interval startle eyeblink modification measures may be useful tools for future investigations of the early and later stages of attentional processing.
本实验研究了短超前间隔和长超前间隔惊吓眨眼修正对注意加工的敏感性。18名大学生被试者听一系列高低音混合的音调，并被要求注意一种音调而忽略另一种音调。大多数被注意和被忽略的音调作为预脉冲，随后在预脉冲开始后60、120、240和2000毫秒的超前间隔呈现引发眨眼的白噪声脉冲。结果表明，被注意和被忽略的预脉冲均产生显著的惊吓眨眼修正：在60、120和240毫秒的短超前间隔有显著的眨眼抑制，在2000毫秒的长超前间隔有眨眼促进。此外，与被忽略的预脉冲相比，被注意的预脉冲在120毫秒超前间隔产生了显著更大的眨眼抑制，在2000毫秒超前间隔产生了显著更大的眨眼促进。这些结果表明，短超前间隔和长超前间隔惊吓眨眼修正测量可能是未来研究注意加工早期和后期阶段的有用工具。
