PROBABILITY EFFECTS ON STIMULUS EVALUATION AND RESPONSE PROCESSES
PROBABILITY EFFECTS ON STIMULUS EVALUATION AND RESPONSE PROCESSES
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DOI：
10.1037/0096-1523.18.1.198
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发表时间：
1992-02-01
影响因子：
2.1
通讯作者：
DONCHIN, E
中科院分区：
文献类型：
--
作者：
GEHRING, WJ;GRATTON, G;DONCHIN, E
本研究探讨了概率信息对反应准备和刺激评价的影响。8名受试者用一只手对目标字母H做出反应，另一只手对目标字母s做出反应。目标字母周围是与目标字母相同或不同的噪声字母。在两种情况下，目标之前有一个与目标字母无关的警告刺激。在另外两种情况下，警告信预示着相同的字母或相反的字母会作为必要的刺激出现。80的概率。当紧急刺激证实警告刺激的预测时，正确的反应时间更快，错误率更低。概率信息影响(a)前期运动反应的准备，(b)对特定目标字母的期望的发展，以及(c)对字母刺激的身份敏感但对其位置不敏感的过程。
This study investigated the effects of probability information on response preparation and stimulus evaluation. Eight subjects responded with one hand to the target letter H and with the other to the target letter S. The target letter was surrounded by noise letters that were either the same as or different from the target letter. In 2 conditions, the targets were preceded by a warning stimulus unrelated to the target letter. In 2 other conditions, a warning letter predicted that the same letter or the opposite letter would appear as the imperative stimulus with .80 probability. Correct reaction times were faster and error rates were lower when imperative stimuli confirmed the predictions of the warning stimulus. Probability information affected (a) the preparation of motor responses during the foreperiod, (b) the development of expectancies for a particular target letter, and (c) a process sensitive to the identities of letter stimuli but not to their locations.