Resumen de Contextual effects on the conversations of mothers and their children with language impairment

Melanie Stich, Luigi Girolametto, Carla J. Johnson, Patricia L. Cleave, Xi Chen

• Twenty-four mothers and their preschool children with language impairment participated in two 12-min sessions of toy play and book reading that were transcribed to yield maternal mean length of utterance in morphemes (MLU-m), type token ratio (TTR), and maternal interaction style (directive vs. responsive). Maternal MLU-m was significantly longer during book reading than during toy play, whereas TTR was similar across contexts. In contrast, children's MLU-m was similar across contexts, whereas TTR was higher during book reading. Mothers used an eliciting style characterized by more commands and questions during toy play than during book reading. Only maternal MLU-m predicted children's expressive language skills (i.e., a composite score of two standardized language tests). The implications include sampling both book reading and play interactions because they provide differential opportunities for conversation and language productivity.