Validity and reliability of the Cantonese version of the checklist for autism in toddlers (CHAT) : a preliminary study
Autism is widely regarded as the most severe psychiatric disorder in childhood. Despite many studies shown that 'he symptoms of autism emerge as early as 12 months of age, the disorder is currently diagnosed relatively late (on average 44 months of age). The Checklist for Autism in Toddlers (CHAT) a quick screening instrument to detect possible cases of autism at the age of 18 months had shown promising predictive validity. The current study aimed to examine the reliability and the validity of the Canloncse version of the CHAT by validating it against three groups of 30-moulh-old children with known diagnoses, namely, autism (n=--21). non-autistic developmental delay (n^39) and normal development (n~40). The results revealed that the Cantonese-CHAT had good internal consistency, good tesl-rclest reliability and good inter-rater agreement as well as a strong correlation with a well-established instrument for rating autistic behaviors. Discriminant validity of the tool was found promising. The items assessing pointing, especially prolodeclaralive pointing (i.e. pointing for interest) and social interest best discriminated the autism from lite other two groups, For clinical implication, the present results delineated the profile of autistic children's social and communicative functioning and this shed light on the intervention program. As a preliminary study, the Cantonese-CHAT was found to be a valid and reliable screening too! lo detect autism al the age of 30 months and this formed a strong base for further validation of the tool in local context.
School:The University of Hong Kong
School Location:China - Hong Kong SAR
Source Type:Master's Thesis
Keywords:autism in children diagnosis
Date of Publication:01/01/2000