Children with clefts exhibit difficulty with language and literacy compared to children without clefts. However, little is known about interventions to address these difficulties in the cleft population. This study will test the efficacy of a parent-focused dialogic book-sharing intervention for toddlers with isolated cleft palate. The study will use a randomized controlled trial (RCT) design and Intention to Treat (ITT) analyses. Child outcomes include expressive and receptive language. Parent outcomes of interest include the frequency and quality of shared reading interactions. To assess mechanisms of action, the study will test whether changes in child outcomes are mediated by changes in parents' behavior. Analyses will also explore heterogeneity in outcomes to determine whether the intervention is more effective in certain clinical or demographic sub-groups.
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Expressive One Word Picture Vocabulary Test-Fourth Edition
Timeframe: End of study (At least 8 weeks after the end of the intervention period)
Receptive One Word Picture Vocabulary Test-Fourth Edition
Timeframe: End of study (At least 8 weeks after the end of the intervention period)
Child Language Sample
Timeframe: End of study (At least 8 weeks after the end of the intervention period)
MacArthur-Bates Communicative Development Inventory - Computer Adaptive Test
Timeframe: Baseline and at end of study (at least 8 weeks after the end of the intervention period)