Cognitive Development in Children with Autism Spectrum Disorder and the Moderating Role of Intervention and ASD...

Area of Science:

• Neuroscience
• Developmental Psychology
• Pediatrics

Background:

• Autism Spectrum Disorder (ASD) is a neurodevelopmental condition affecting social communication and behavior.
• Early cognitive assessment in toddlers diagnosed with ASD is crucial for understanding developmental trajectories.
• The long-term predictive validity of early cognitive scores and the influence of ASD persistence and interventions remain key research questions.

Purpose of the Study:

• To determine if cognitive scores from the Bayley Scales of Infant and Toddler Development-III (Bayley-III) in toddlers diagnosed with ASD predict intellectual quotient (IQ) at school age.
• To investigate whether the persistence of ASD or receipt of interventions moderates the relationship between early cognitive scores and later IQ.

Main Methods:

• Longitudinal study tracking children clinically diagnosed with ASD at 12-36 months.
• Cognitive assessments using Bayley-III at toddlerhood and research assessments at 5-7 years to determine ASD persistence and school-age IQ.
• Statistical analyses including correlation and regression to examine predictive relationships and moderating effects of ASD persistence and interventions.

Main Results:

• A moderate positive correlation (r = 0.45, p < 0.001) was found between toddler cognitive scores and school-age IQ.
• Children with lower baseline cognitive scores (<70) exhibited greater variability in school-age IQ.
• Non-persistent ASD was linked to significant cognitive change from toddler to school age (p < 0.001); interventions showed no benefit for non-persistent ASD and an inverse relationship for persistent ASD.

Conclusions:

• Early cognitive performance in toddlers with ASD is a significant predictor of school-age IQ.
• ASD persistence and the nature of interventions play a role in cognitive development trajectories.
• Findings highlight the importance of early cognitive assessment and tailored interventions for children with ASD.