The Effect 1 Running Head : CATEGORY VARIABILITY The Effect of Category Variability in Perceptual Categorization Neil
نویسنده
چکیده
Exemplar and distributional accounts of categorization make differing predictions for the classification of a critical exemplar precisely halfway between the nearest exemplars of two categories differing in variability. Under standard conditions of sequential presentation, the critical exemplar was classified into the most similar, least variable category, consistent with an exemplar account. However, if the difference in variability is made more salient, then the same exemplar is classified into the more variable, most likely category, consistent with a distributional account. This suggests that participants may be strategic in their use of either strategy. However, when the relative variability of two categories was manipulated, participants showed changes in the classification of intermediate exemplars that neither approach could account for.
منابع مشابه
Category variability effect in category learning with auditory stimuli
The category variability effect refers to that people tend to classify the midpoint item between two categories as the category more variable. This effect is regarded as evidence against the exemplar model, such as GCM (Generalized Context Model) and favoring the rule model, such as GRT (i.e., the decision bound model). Although this effect has been found in conceptual category learning, it is ...
متن کاملThe effect of category variability in perceptual categorization.
Exemplar and distributional accounts of categorization make differing predictions for the classification of a critical exemplar precisely halfway between the nearest exemplars of 2 categories differing in variability. Under standard conditions of sequential presentation, the critical exemplar was classified into the most similar, least variable category, consistent with an exemplar account. How...
متن کاملRunning Head: SEQUENCE EFFECTS Sequence Effects in Categorization of Simple Perceptual Stimuli
Categorization research typically assumes that the cognitive system has access to a (more or less noisy) representation of the absolute magnitudes of the properties of stimuli, and that this information is used in reaching a categorization decision. However, research on identification of simple perceptual stimuli suggests that people have poor representations of absolute magnitude information a...
متن کاملCategory Discontinuity Interacts with Verbal Rule Complexity 1 Within-Category Discontinuity Interacts with Verbal Rule Complexity in Perceptual Category Learning
Two experiments were conducted that provide a test of the predicted interaction between within-category discontinuity and verbal rule complexity on the efficiency of the neurobiologically-motivated procedural-based and hypothesis-testing category learning systems, and by extension, on information-integration and rule-based category learning. In Experiment 1, within-category discontinuity advers...
متن کاملAsymmetric Categorization in the Sequential Auditory Domain
An unusual category learning asymmetry in infants was observed by Quinn et al. (1993). Infants who were initially exposed to a series of pictures of cats and then were shown a dog and a novel cat, showed significantly more interest in the dog than in the cat. However, when the order of presentation was reversed — i.e., dogs were seen first, then a cat and a novel dog — the cat attracted no more...
متن کامل