Developmental quotient to estimate intelligence in autism spectrum disorder

Area of Science:

• Developmental Psychology
• Neurodevelopmental Disorders
• Pediatric Assessment

Background:

• Autism Spectrum Disorders (ASD) are defined by social communication deficits and restricted behaviors.
• Developmental Quotient (DQ) measures developmental progress relative to chronological age.
• Accurate cognitive assessment is crucial for early intervention in young children with ASD.

Purpose of the Study:

• To evaluate the utility of the Developmental Quotient (DQ) for estimating cognitive ability in young children diagnosed with Autism Spectrum Disorder (ASD).
• To explore the correlation between DQ scores and Intelligence Quotient (IQ) in this population.

Main Methods:

• Assessed 18 children with ASD (ages 45-83 months) using the Kyoto Scale of Psychological Development 2001 (KSPD) for DQ and the Wechsler Intelligence Scale for Children-III (WISC-III) for IQ.
• Analyzed the correlation between DQ and IQ scores across different domains (full scale, verbal, performance).

Main Results:

• Significant correlations were found between Cognitive-Adaptive and Language-Social DQ scores and full-scale, verbal, and performance IQ.
• A strong linear correlation (R=0.823) was observed between overall DQ and full-scale IQ.
• The Kyoto Scale of Psychological Development (KSPD) demonstrated good agreement with the Wechsler Intelligence Scale for Children-III (WISC-III).

Conclusions:

• Developmental Quotient (DQ) scores derived from the Kyoto Scale of Psychological Development (KSPD) serve as a reliable estimate of cognitive ability in young children with Autism Spectrum Disorder (ASD).
• The KSPD presents a viable alternative to the Wechsler Intelligence Scale for Children-III (WISC-III), potentially enabling earlier and more accessible cognitive assessments for children with ASD.