Developmental Profile of Children with Autism Spectrum Disorder Versus Social Communication Disorder: A Pilot Study

Area of Science:

• Neurodevelopmental Disorders
• Child Psychology
• Diagnostic Psychiatry

Background:

• Social Communication Disorder (SCD) is defined by the DSM-5, differentiating it from Autism Spectrum Disorder (ASD) through the lack of restricted and repetitive behaviors or interests (RRBIs).
• Understanding the distinctions between ASD and SCD is crucial for accurate diagnosis and intervention.
• Both disorders present with communication challenges, necessitating a closer examination of their unique profiles.

Purpose of the Study:

• To compare the adaptive, sensory, communication, and cognitive profiles of children diagnosed with ASD versus SCD.
• To identify specific markers that can aid in distinguishing between ASD and SCD.
• To investigate the impact of RRBIs on the observed differences between the two groups.

Main Methods:

• Comparative analysis of assessment data from children with ASD and SCD.
• Utilized the Vineland Adaptive Behavior Scales, Autism Diagnostic Observation Schedule (ADOS), Short Sensory Profile, Children's Communication Checklist, pragmatics evaluation, and Wechsler Intelligence Scale for Children IV.
• Statistical comparison using Fisher's Exact Test or Mann-Whitney Test to determine significant differences.

Main Results:

• The ASD group exhibited significantly higher scores on the ADOS and its 'Restricted and Repetitive Behaviors' subscale compared to the SCD group.
• Children with ASD showed significantly lower scores in the 'Socialization' domain of the Vineland Adaptive Behavior Scales.
• The ASD group also demonstrated significantly lower working memory index scores compared to the SCD group.

Conclusions:

• While both ASD and SCD share communication and pragmatic difficulties, significant differences exist in executive functioning and socialization impacts.
• The absence of RRBIs in SCD appears linked to distinct profiles in socialization and cognitive functions.
• The findings underscore the diagnostic challenges in differentiating ASD and SCD due to limited discriminative tools, emphasizing the need for further research.