The initial reliability and construct validity of the Autism Spectrum Disorder-Diagnostic (ASD-DC) in children

The aim of the present study was to examine the reliability and construct validity of a newly developed assessment scale designed to identify autism spectrum disorders in children: Autism Spectrum Disorder-Diagnostic for Children (ASD-DC). Participants were parents and caregivers of children between ages 2 and 16 years, who are typically developing or developmentally delayed. Participants were asked to complete several rating scales including the ASD-DC, a DSM-IV-TR/ICD-10 checklist, the Matson Evaluation of Social Skills in Youngsters (MESSY), and the Behavioral Assessment System for Children, Version 2 (BASC-2). In Study 1, the test-retest, inter-rater, and inter-item reliabilities of the ASD-DC was examined. After initial reliability analysis, the scale was reduced to 37 items. The ASD-DC was found to have good to excellent inter-rater reliability, and excellent test-retest reliability. The 37 item scale had excellent internal consistency (Ą = .99) and adequate item-scale correlations. In Study 2, the construct validity of the ASD-DC was investigated by evaluating the pattern of correlations (i.e., convergent and divergent validity) among the administered scales utilizing a correlation matrix. The ASD-DC converged with another measure of autism (i.e., DSM-IV-TR/ICD-10 checklist) and other associated symptoms of ASD. Further, divergence was observed when the ASD-DC was correlated with measures of social skills and functional communication. Based on the results of this initial study of the ASD-DC, the psychometric properties of this new scale are promising and warrant further investigation. Implications of these findings and future directions are discussed.

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Psychology

Grantor

Psychology

Year dc:date.available

2008

Author dc:creator

• Gonzalez, Melissa Luke

• assessment
• autism
• developmental disabilities

Statement dc:rights

• unrestricted
• Release the entire work immediately for access worldwide.

Identifier

etd-07072008-204632
https://repository.lsu.edu/gradschool_dissertations/734

OAI identifier oai:identifier

oai:repository.lsu.edu:gradschool_dissertations-1733