Characteristics of Parent-Child Interactions: A Systematic Review of Studies Comparing Children with Primary Language Impairment and Their Typically Developing Peers.

The importance of parent–child interaction (PCI) for language development has been well established. This has led many speech and language therapy (SLT) interventions to focus on modifying PCI as a means to improving children’s early language delay. However, the success of such programs is mixed. The current review compares PCI, observed in naturally occurring contexts, with preschool children with language delay and age- or language-matched typically developing (TD) controls. A systematic review of the literature searched 10 databases for studies using a case-control design and extracted data concerning participants, matching, selection, design, assessments, measures, findings, statistics, and bias. Quality appraisal used the Critical Appraisal Skills Programme case-control checklist. The search identified 17,824 articles, which were reviewed against exclusion criteria. The final review included 9 studies, which were diverse in terms of matching, delay criteria, and PCI measure. A narrative synthesis was...