Abstract

Previously, we presented results suggesting that neighborhood density could influence perception in phoneme identification tasks. In a typical task demonstrating this effect, subjects might hear two series, one ranging from beysh to peysh, while the other varied from beyth to peyth, where beyth is similar to more real words than peyth, and peysh is similar to more real words than beysh. Subjects were more likely to classify the ambiguous stimuli from each series as members of the category which makes it more wordlike. In the present series, similar series were created where the only neighbors for the endpoints were ones that differed in their initial consonant. We created two pairs of series: in the first, ∫oif–t∫oif and ∫of–t∫of, the neighbors which drove the bias were all ones which matched on the initial phoneme (e.g, choke). In the second series, zU∫–zUt∫ and zE∫–zEt∫, the only neighbors for the items were ones that mismatched on the initial phoneme (e.g., push, mesh, fetch, etc.). Similar neighborhood effects were found for both series, suggesting that words in memory which do not match the beginning of a perceived item are still activated and can still influence perception.

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