Stimulus significance effects in habituation of the phasic and tonic orienting reflex

被引:0
作者
Robert J. Barry
机构
[1] University of Wollongong,Brain & Behaviour Research Institute
[2] University of Wollongong,Department of Psychology
来源
Integrative Physiological & Behavioral Science | 2004年 / 39卷
关键词
electrodermal activity; skin conductance level; skin conductance response; Orienting Reflex; OR theory; significance;
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学科分类号
摘要
Phasic and tonic measures of electrodermal activity were examined in a simple habituation paradigm, using innocuous visual stimuli. Separate groups were used to investigate the effects of stimulus significance, as manipulated by instructions. One group had no stimulus-related task (indifferent group), while the other was asked to silently count the stimuli to report to the experimenter later (significant group). Prestimulus skin conductance levels were considered as measures of the arousal level at each stimulus presentation, and the subsequent electrodermal responses were taken as the phasic orienting reflex (OR) elicited by each stimulus. Changes in prestimulus arousal were taken as measures of the tonic OR to the experimental series. Marked group differences were found in both phasic and tonic components of the OR. Some, but not all, of the significance effects in the phasic OR were attributable to differences in arousal. The results are discussed in the context of theoretical accounts of the OR.
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页码:166 / 179
页数:13
相关论文
共 30 条
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