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Differentiating the effects of phonotactic probability and neighborhood density on vocabulary comprehension and production: A comparison of preschool children with versus without phonological delays
Storkel, Holly L. Maekawa, Junko Hoover, Jill R.
Storkel, Holly L.
Maekawa, Junko
Hoover, Jill R.
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Abstract
Purpose
The purpose of this study was to differentiate the effect of phonotactic probability from that of neighborhood density on a vocabulary probe administered to preschool children with or without a phonological delay.
Method
Twenty preschool children with functional phonological delays and 34 preschool children with typical language development completed a 121 item vocabulary probe in both an expressive and receptive response format. Words on the vocabulary probe orthogonally varied on phonotactic probability and neighborhood density but were matched on age-of-acquisition, word frequency, word length, semantic set size, concreteness, familiarity, and imagability.
Results
Results showed an interaction between phonotactic probability and neighborhood density with variation across groups. Specifically, the optimal conditions for typically developing children were rare phonotactic probability with sparse neighborhoods and common phonotactic probability with dense neighborhoods. In contrast, only rare phonotactic probability with sparse neighborhoods was optimal for children with phonological delays.
Conclusions
Rare sound sequences and sparse neighborhoods may facilitate triggering of word learning for typically developing children and children with phonological delays. In contrast, common sound sequences and dense neighborhoods may facilitate configuration and engagement for typically developing children but not children with phonological delays due to their weaker phonological and/or lexical representations.
Description
This is the author's accepted manuscript. The original publication is available at http://jslhr.pubs.asha.org/article.aspx?articleid=1781591
Date
2010
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Publisher
American Speech-Language-Hearing Association
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Keywords
Word learning, Vocabulary, Neighbourhood density, Phonotactic probability, Phonological delay
Citation
Storkel, Holly L., Junko Maekawa, and Jill R. Hoover. "Differentiating the Effects of Phonotactic Probability and Neighborhood Density on Vocabulary Comprehension and Production: A Comparison of Preschool Children With Versus Without Phonological Delays." J Speech Lang Hear Res Journal of Speech Language and Hearing Research 53.4 (2010): 933. http://dx.doi.org/10.1044/1092-4388(2009/09-0075).