Early predictors of pragmatic language competence: A longitudinal study

Pragmatic language competence-the ability to use language effectively in social contexts-is foundational for communication, learning, and social integration. Difficulties in pragmatics are not only a hallmark of autism spectrum disorder (ASD) but are also prevalent across developmental disabilities, including ADHD, developmental language disorder, and intellectual disability. Such deficits predict long-term challenges in adaptive functioning, peer relationships, and educational attainment. This longitudinal study investigates early predictors of pragmatic language competence in middle childhood (age 8.5), using developmental data from the Norwegian Mother, Father, and Child Cohort Study (MoBa) and the Language-8 study. We examined social-communicative behaviors at 18 and 36 months-specifically joint attention, declarative pointing, and imitation-using items from the Modified Checklist for Autism in Toddlers (M-CHAT) and Ages and Stages Questionnaire (ASQ). Results indicate that early joint attention and social responsiveness significantly predict later pragmatic competence, even in a community sample without clinical diagnoses. These findings highlight pragmatic language difficulties as a transdiagnostic marker of developmental vulnerability and underscore the importance of early identification and intervention. By clarifying early predictors, this research informs both developmental science and special education practice, strengthening pathways for early support to children at risk of communication and social challenges.