This longitudinal study explored the rate of language growth of children in an early intervention program providing auditory-verbal therapy. A retrospective investigation, the study applied a linear growth model to estimate a mean growth curve and the extent of individual variation in language performance on the Preschool Language Scale, 4th ed. (PLS-4; Zimmerman, Steiner, & Pond, 2002) for 24 children with hearing loss in a convenience sample. A statistically significant change in raw scores was observed across 6-month intervals. However, growth in standard scores did not show statistically significant predictable change across the 6-month intervals. Scores on the language measure were closer to expectations for younger peers with normal hearing when compared to data reported for the PLS-4 normative sample. Language outcomes varied significantly for individual children based on time spent in early intervention, suggesting that intervention was contributing to growth.


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pp. 539-554
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