Baum William M, Davison Michael
University of California, Davis, USA.
Behav Processes. 2009 Jun;81(2):189-94. doi: 10.1016/j.beproc.2009.01.005. Epub 2009 Jan 31.
A simple linear-operator model both describes and predicts the dynamics of choice that may underlie the matching relation. We measured inter-food choice within components of a schedule that presented seven different pairs of concurrent variable-interval schedules for 12 food deliveries each with no signals indicating which pair was in force. This measure of local choice was accurately described and predicted as obtained reinforcer sequences shifted it to favor one alternative or the other. The effect of a changeover delay was reflected in one parameter, the asymptote, whereas the effect of a difference in overall rate of food delivery was reflected in the other parameter, rate of approach to the asymptote. The model takes choice as a primary dependent variable, not derived by comparison between alternatives-an approach that agrees with the molar view of behaviour.
一个简单的线性算子模型既描述又预测了可能构成匹配关系基础的选择动态。我们测量了一种实验安排各组成部分内的食物间选择，该实验安排呈现了七对不同的并发可变间隔时间表，每对时间表对应12次食物投放，且没有信号表明哪一对时间表正在生效。这种局部选择的测量结果能够被准确地描述和预测，因为获得的强化物序列会使其偏向某一种选择。转换延迟的影响反映在一个参数即渐近线上，而食物投放总体速率差异的影响则反映在另一个参数即接近渐近线的速率上。该模型将选择作为主要因变量，而非通过替代方案之间的比较得出——这种方法与行为的整体观一致。
