UC Merced Proceedings of the Annual Meeting of the Cognitive Science Society Title Abstraction versus Selective Attention in Classification Learning Publication Date Abstraction versus Selective Attention in Classification Learning

Author Kurtz, Kenneth, Kenneth Kurtz
2005 Proceedings of the Annual Meeting of the Cognitive Science Society   unpublished
The Shepard, Hovland, & Jenkins (1961) result that Type II (exclusive-or, XOR) category structures are easier to acquire than Type IV (family resemblance, FR) is shown not to replicate with less easily analyzable stimuli. By increasing the number of stimulus dimensions, the traditional XOR advantage emerges in terms of likelihood of reaching a demanding performance criterion, however more errors are actually made during study by XOR learners as compared to FR. Removing borderline instances from
more » ... line instances from the training set promotes acquisition of the family resemblance structure and leads to a reversal: an actual learning advantage for FR-strong over XOR. Similarity ratings collected after learning reveal another failed prediction of the selective attention account. This set of findings upsets the foundations for the current pecking order among models of category learning.
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