Recency effects as a window to generalization: separating decisional and perceptual sequential effects in category learning.
نویسندگان
چکیده
Accounts of learning and generalization typically focus on factors related to lasting changes in representation (i.e., long-term memory). The authors present evidence that shorter term effects also play a critical role in determining performance and that these recency effects can be subdivided into perceptual and decisional components. Experimental results based on a probabilistic category structure show that the previous stimulus exerts a contrastive effect on the current percept (perceptual recency) and that responses are biased toward or away from the previous feedback, depending on the similarity between successive stimuli (decisional recency). A method for assessing these recency effects is presented that clarifies open questions regarding stimulus generalization and perceptual contrast effects in categorization and in other domains.
منابع مشابه
Pre Test Excerpt
Stimulus generalization is often regarded as a fundamental component of category learning, yet it has not been directly studied in this context. Here we develop a technique for measuring generalization based on sequential effects in subjects’ responses. We find that patterns of generalization can adapt to global properties of the task, but only when the category structure is defined by perceptu...
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ورودعنوان ژورنال:
- Journal of experimental psychology. Learning, memory, and cognition
دوره 32 2 شماره
صفحات -
تاریخ انتشار 2006