Autism spectrum disorder screening in Chinese-language preschools

Area of Science:

• Developmental Psychology
• Child Psychiatry
• Educational Psychology

Background:

• The Classroom Observation Scale (COS) is a 13-item tool for screening autism spectrum disorder (ASD) in preschool children.
• Originally validated in English in Hong Kong's international schools with favorable teacher-student ratios.
• The need for validation in less-resourced settings with typical teacher-student ratios and by non-specialist observers.

Purpose of the Study:

• To investigate the ecological validity of the COS when used by Chinese teachers in typical Chinese preschools.
• To assess the reliability of the COS in identifying children at risk for ASD in less-resourced educational environments.
• To evaluate the tool's utility for early ASD identification by non-clinically trained personnel.

Main Methods:

• The COS was administered by research assistants and preschool teachers in Chinese-language preschools.
• Observers received minimal training (a few hours for researchers, one hour for teachers).
• The study focused on children in their first year of preschool.

Main Results:

• The COS reliably identified children more likely to have ASD, comparable to original findings.
• Reliability estimates for teacher and researcher versions were similar to the original English COS.
• The tool proved effective even with limited observer training and in typical preschool settings.

Conclusions:

• The Classroom Observation Scale demonstrates versatility and ecological validity for early ASD identification.
• It is a reliable tool for preschool teachers and non-clinically trained observers in community settings.
• The COS supports the early detection of autism spectrum disorder in diverse preschool populations.