Adaptive Functioning in Expressively Nonverbal and Minimally Verbal Autistic Children: Nonverbal Intelligence as a
Ekaine Rodríguez-Armendariz1, Zuriñe Ábalos1, Elena Castroviejo1
1Department of Linguistics and Basque Studies, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain.
Autism & Developmental Language Impairments
|August 5, 2026
Summary
Nonverbal IQ (NVIQ) is a key predictor of adaptive functioning in autistic children with limited language skills. Early cognitive assessments are crucial for understanding long-term outcomes in autism.
Area of Science:
- Neurodevelopmental Disorders
- Child Psychology
- Developmental Pediatrics
Background:
- Adaptive functioning is vital for autistic individuals' long-term outcomes.
- Evidence linking adaptive functioning to ADOS-2 scores, nonverbal IQ (NVIQ), and early language is inconsistent.
- Limited research exists on early linguistic abilities' role in adaptivity for minimally verbal autistic children.
Purpose of the Study:
- To investigate the relationship between receptive language delay, NVIQ, and ADOS-2 comparison scores with later adaptive functioning in nonverbal and minimally verbal autistic children.
- To determine the predictive value of NVIQ, ADOS-2 scores, and receptive language on adaptivity.
- To explore potential interactions between these factors.
Main Methods:
- Longitudinal study of 44 autistic children (4-12 years) with limited expressive language.
- Baseline assessments included ADOS-2 Module 1, Leiter-3 NVIQ, and PPVT-III receptive vocabulary.
- Adaptive functioning assessed using Vineland-3 2-3 years later via multiple linear regression models, controlling for age and testing interval.
Main Results:
- NVIQ was the sole significant predictor of adaptive functioning.
- ADOS-2 scores and receptive vocabulary were not significant predictors once NVIQ was accounted for.
- Higher NVIQ was not linked to greater adaptive difficulties in this sample, contrary to some prior findings.
Conclusions:
- NVIQ is a stronger predictor of adaptive functioning in minimally verbal autistic children than ADOS-2 scores or receptive language delay.
- Early NVIQ assessment is important for prognostic evaluations in autism.
- Adaptive outcomes may be less dependent on specific trait profiles or linguistic comprehension than previously assumed.
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