Value-added predictors of expressive and receptive language growth in initially nonverbal preschoolers with autism spectrum disorders
- PMID: 25344152
- PMCID: PMC4495651
- DOI: 10.1007/s10803-014-2286-4
Value-added predictors of expressive and receptive language growth in initially nonverbal preschoolers with autism spectrum disorders
Abstract
Eighty-seven preschoolers with autism spectrum disorders who were initially nonverbal (under 6 words in language sample and under 21 parent-reported words said) were assessed at five time points over 16 months. Statistical models that accounted for the intercorrelation among nine theoretically- and empirically-motivated predictors, as well as two background variables (i.e., cognitive impairment level, autism severity), were applied to identify value-added predictors of expressive and receptive spoken language growth and outcome. The results indicate that responding to joint attention, intentional communication, and parent linguistic responses were value-added predictors of both expressive and receptive spoken language growth. In addition, consonant inventory was a value-added predictor of expressive growth; early receptive vocabulary and autism severity were value-added predictors of receptive growth.
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