Efficacy of the ADEC in Identifying Autism Spectrum Disorder in Clinically Referred Toddlers in the US

Area of Science:

• Pediatric Psychology
• Developmental Neuroscience
• Clinical Child Psychology

Background:

• Early identification of autism spectrum disorder (ASD) is crucial for timely intervention.
• Existing screening tools vary in effectiveness and ease of use for toddlers.
• The Autism Detection in Early Childhood (ADEC) is a play-based screening tool designed for young children.

Purpose of the Study:

• To evaluate the psychometric properties of the ADEC screening tool.
• To assess the ADEC's sensitivity and specificity in a clinical sample of toddlers.
• To compare the ADEC's performance with the Autism Diagnostic Observation Schedule, Second Edition (ADOS-2).

Main Methods:

• The study involved a clinical sample of 114 toddlers (12-36 months) referred for developmental delay or ASD concerns.
• Psychometric properties, including sensitivity, specificity, internal consistency, and inter-rater reliability, were examined.
• The ADEC's performance was compared against a best estimate clinical diagnosis and the ADOS-2.

Main Results:

• The ADEC demonstrated good sensitivity (0.93-0.94) for detecting ASD.
• Specificity was found to be moderate (0.62-0.64).
• Internal consistency (α = .80) and inter-rater reliability (ICC = .95) were high, and performance favorably compared to the ADOS-2.

Conclusions:

• The ADEC is a reliable and valid screening tool for ASD in toddlers aged 12-36 months.
• Its good sensitivity suggests it is effective in identifying children who may have ASD.
• The ADEC shows promise as a valuable clinical instrument for early ASD screening.