Maes J H R
Nijmegen Institute for Cognition and Information, Biological Psychology, University of Nijmegen, Nijmegen, The Netherlands.
Learn Behav. 2003 Nov;31(4):332-48. doi: 10.3758/bf03195995.
In two experiments, the behavioral effects of different response-feedback contingencies were examined with a task requiring human subjects to repeatedly type three-key sequences on a computer keyboard. In Experiment 1, the subjects first received positive feedback for response variability, followed by no feedback, or vice versa In Experiment 2, the subjects first received positive feedback for response variability, followed by response-independent positive feedback, or vice versa. Response stability and variability were examined using different measures, such as percentage of trials meeting the variability criteria, frequency of use of the different response alternatives, and autocorrelations as an index of response randomness. The subjects' behavior in the first phase in each condition came to reflect the current feedback contingency. Depending on the measure examined, responding after each contingency change was characterized by both response stability and decreases or increases in response variability. The collective results are discussed in the framework of previous animal and human studies on behavioral stability and variability.
在两项实验中，通过一项要求人类受试者在电脑键盘上反复键入三键序列的任务，研究了不同反应反馈条件的行为效应。在实验1中，受试者首先因反应变异性而获得积极反馈，随后无反馈，或者反之。在实验2中，受试者首先因反应变异性而获得积极反馈，随后是与反应无关的积极反馈，或者反之。使用不同的测量方法来检验反应稳定性和变异性，例如达到变异性标准的试验百分比、不同反应选项的使用频率，以及作为反应随机性指标的自相关。在每种条件下，受试者在第一阶段的行为开始反映当前的反馈条件。根据所检验的测量方法，每次条件变化后的反应既表现出反应稳定性，也表现出反应变异性的降低或增加。在先前关于行为稳定性和变异性的动物和人类研究框架内对这些总体结果进行了讨论。
