Suárez, Lidia, Tan, Seok Hui, Yap, Melvin J., and Goh, Winston D. (2011) Observing neighborhood effects without neighbors. Psychonomic Bulletin and Review, 18 (3). pp. 605-611.

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Abstract

With a new metric called phonological Levenshtein distance (PLD20), the present study explores the effects of phonological similarity and word frequency on spoken word recognition, using polysyllabic words that have neither phonological nor orthographic neighbors, as defined by neighborhood density (the N-metric). Inhibitory effects of PLD20 were observed for these lexical hermits: Close-PLD20 words were recognized more slowly than distant PLD20 words, indicating lexical competition. Importantly, these inhibitory effects were found only for low- (not high-) frequency words, in line with previous findings that phonetically related primes inhibit recognition of low-frequency words. These results indicate that the properties of PLD20-a continuous measure of word-form similarity-make it a promising new metric for quantifying phonological distinctiveness in spoken word recognition research.

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