Learning to categorize perceptually similar stimuli can result in people becoming more sensitive to differences along perceptual dimensions that are relevant to category membership and/or less sensitive to equivalent differences along irrelevant perceptual dimensions. These effects of acquired distinctiveness and acquired equivalence may be caused…

Thirty college students attempted to form three 3-node 5-member equivalence classes under the simultaneous protocol. After concurrent training of AB, BC, CD, and DE relations, all probes used to assess the emergence of symmetrical, transitive, and equivalence relations were presented for two test blocks. When the A-E stimuli were all abstract…

The present experiment was designed to specify more clearly the function of IARs in VD learning by varying the number of taxonomic categories used to make up the VD lists. (Author)

Examined the ability of bilingual college students from Catalonia, Spain to learn a new vowel contrast as indicated by classifying the vowel, discriminating two vowels, and judging its "category-goodness." Found a lack of behavioral plasticity and that early, extensive exposure to a second language was sufficient to attain the…