Purpose: This study examined the efficacy of the Vocabulary Acquisition and Usage for Late Talkers (VAULT) treatment in a version that manipulated the length of clinician utterance in which a target word was presented (dose length). The study also explored ways to characterize treatment responders versus nonresponders. Method: Nineteen primarily…

Background: Identifying risk and protective factors for language development informs interventions for children with developmental language disorder (DLD). Maternal responsive and intrusive communicative behaviours are associated with language development. Mother-child interaction quality may influence how children use these behaviours in language…

This study investigates whether extension of a caregiver-led interactive language program may enhance its effectiveness in supporting communication. Caregiver-led language programs, which focus on establishing responsive interaction patterns to support opportunities for communication between caregivers and young children within natural settings,…

Speech and language difficulties can be indicative of other cognitive, social and developmental problems. Tools used in the UK have not (1) targeted two-year-old children, (2) included both parents' reports and independent observations, and (3) simultaneously evaluated expression, understanding and speech. This cross-sectional study of two…

The lexical variables of word frequency and neighborhood density were hypothesized to facilitate sound change to varying degrees. Twelve children with functional phonological delays participated in an alternating-treatments experiment to promote sound change. Results indicated word frequency was most facilitative in sound change, whereas dense…