Effects of stimulus preexposure and intermodality change on electrodermal orienting.
Effects of stimulus preexposure and intermodality change on electrodermal orienting.
复制标题
刺激预暴露和联运变化对皮肤电定向的影响。
DOI：
10.1111/j.1469-8986.1994.tb01045.x
复制
发表时间：
1994
期刊：
影响因子：
3.7
通讯作者：
P. J. Dall
中科院分区：
文献类型：
--
作者：
D. Siddle;O. Lipp;P. J. Dall
先前的研究表明，在习惯化系列之后呈现的通道间变化试验比该系列的第一个刺激诱发更大的定向反应。实验1（N = 48）调查是否这种效果仍然存在，如果改变刺激是不新颖的，但提出了一次之前的习惯化系列。两组受试者提出了一系列的24个音调或振动触觉刺激。试验25是一项针对每组一半受试者的多模态变化测试试验（变化），而其余受试者接受额外的习惯化刺激（无变化）。在习惯化试验之前，每个受试者暴露于在变化条件下使用的测试刺激一次。虽然测试试验的反应幅度在变化条件下比在无变化条件下大，但测试试验的反应幅度并没有超过习惯化系列的第一次试验。在实验2（N = 84）中，一组预先暴露于测试刺激，另一组预先暴露于实验无关的刺激，第三组在习惯化训练之前没有接受刺激。测试试验的反应幅度大于反应的第一个刺激的习惯化的变化组，没有暴露于刺激之前习惯化，但不是在预暴露组。在习惯化训练之前预先暴露于刺激物，即使测试刺激物是新颖的，也会消除通道间变化效应。目前的研究结果提出了问题的习惯化的noncomparator理论和支持的概念，预期的过程是重要的定向和习惯化。
Previous research has indicated that an intermodality change trial presented after a habituation series elicits larger orienting responses than does the first stimulus of that series. Experiment 1 (N = 48) investigated whether this effect was still present if the change stimulus was not novel but was presented once prior to the habituation series. Two groups of subjects were presented with a series of 24 tones or vibrotactile stimuli. Trial 25 was an intermodality change test trial for half of the subjects in each group (change), whereas the remaining subjects received an additional habituation stimulus (no change). Prior to the habituation trials, each subject was exposed once to the test stimulus used in the change condition. Although response magnitude on the test trial was larger in the change condition than in the no-change condition, test trial response magnitude did not exceed that on the first trial of the habituation series. In Experiment 2 (N = 84), one group was preexposed to the test stimulus, another was preexposed to an experimentally irrelevant stimulus, and a third received no stimulus prior to habituation training. Test trial response magnitude was larger than responses to the first stimulus of habituation in the change group that was not exposed to a stimulus prior to habituation but not in the preexposed groups. Preexposure to a stimulus prior to habituation training abolished the intermodality change effect even when the test stimulus was novel. The present results pose problems for noncomparator theories of habituation and support the notion that anticipatory processes are important in orienting and habituation.