Background
Nonverbal communication abilities, including gesture use, are impaired in autism spectrum disorder (ASD). However, little is known about how common gestures may influence or be influenced by other areas of development.
Aims
This study examined relationships among gesture, fine motor, and language in young children with ASD compared to a comparison group using multiple measures and methods in a structural equation modeling framework.
Methods & Procedures
Participants included 110 children with ASD and a non-ASD comparison group of 87 children (that included children with DD or TD), from 12 to 48 months of age. A construct of gesture use as measured by the Communication and Symbolic Behavior Scales–Developmental Profile Caregiver Questionnaire (CQ) and the Autism Diagnostic Observation Schedule (ADOS), as well fine motor from the Mullen Scales of Early Learning and Vineland Adaptive Behavior Scales-II (VABS-II) was examined using second-order confirmatory factor analysis (CFA). A series of structural equation models then examined concurrent relationships between the aforementioned latent gesture construct and expressive and receptive language. A series of hierarchical regression analyses was run in a subsample of 36 children with ASD with longitudinal data to determine how gesture factor scores predicted later language outcomes.
Outcomes & Results
Across study groups, the gesture CFA model with indicators of gesture use from both the CQ (parent-reported) and ADOS (direct observation), and measures of fine motor provided good fit with all indicators significantly and strongly loading onto one gesture factor. This model of gesture use, controlling for age, was found to strongly correlate with concurrent expressive and receptive language. The correlations between gestures and concurrent language were similar in magnitude in both the ASD and the non-ASD group. In the longitudinal subsample of children with ASD, gestures at Time 1 predicted later receptive (but not expressive) language outcomes on the VABS-II, after controlling for nonverbal cognition, ASD severity, age, and Time 1 language.
Conclusions & Implications
This study extends research on the relationship of nonverbal communication and language by supporting the idea of an underlying construct of gesture use that includes fine motor ability and relates to language in young children with ASD. This further supports theories espousing developmental influences of motor and nonverbal communication strategies as important in early language learning.