Approximately 10% of children with a speech sound disorder present with an inconsistent phonological disorder, characterized by inconsistent production of words across multiple trials. A number of studies have provided evidence of the efficacy of core vocabulary therapy for the remediation of this speech sound disorder with a dosage of two…

Background: Little is known about the nature, range and prevalence of different subgroups in language trajectories extant in a population from 4 to 11 years. This hinders strategic targeting and design of interventions, particularly targeting those whose difficulties will likely persist. Methods: Children's language abilities from 4 to 11 years…