Parents modify gesture according to task demands and child language needs

Parent–child interaction plays a crucial role in early language acquisition. In young typically developing children, direct and indirect relationships between parent gesture, child gesture and child language have been observed. Far less is known about these relationships in atypical language development. The present study investigated parent gesture frequency in relation to child gesture frequency and language ability. Parent–child dyads were observed for children aged 6–8 years with developmental language disorder (DLD: n = 21) relative to parents of typically developing peers (TD: n = 18) and children with low language (LL) and educational concerns (n = 21). Parents of children with DLD gestured at significantly higher rates than parents of TD children, but only during a complex interactive problem solving task. Across the entire sample, parent gesture rate was positively correlated with child gesture rate, but negatively correlated with child vocabulary. Parent gesture thus may serve as a strategy to maximise communication success for children with language difficulties and is most evident when communication demands are high