Age of word acquisition effects in treatment of children with phonological delays

JUDITH A. GIERUT, MICHELE L. MORRISETTE
2011 Applied Psycholinguistics  
The effects of the age of acquisition (AoA) of words were examined in the clinical treatment of 10 preschool children with phonological delays. Using a single-subject multiple-baseline experimental design, children were enrolled in one of four conditions that varied the AoA of the treated words (early vs. late acquired) relative to their corresponding word frequency (high vs. low frequency). Phonological generalization to treated and untreated sounds in error served as the dependent variable.
more » ... sults showed that late acquired words induced greater generalization, with an effect size four times greater than early acquired words, whereas the effects of word frequency were minimized. Results are discussed relative to hypotheses about the role of AoA in language acquisition and the relevance of this variable for phonological learning.
doi:10.1017/s0142716411000294 pmid:22408279 pmcid:PMC3293394 fatcat:nentkyjxgnauhavn4jknndupgi