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Measuring the Functional Impact of Behavioral Inflexibility in Children with Autism Using the Behavioral
James W Bodfish1, Luc Lecavalier2, Clare Harrop3
1Vanderbilt University Medical Center, 1215 21st Avenue South MCE, South Tower, Nashville, TN, 37232, USA.
Abstract:
For individuals with autism spectrum disorder (ASD), behavioral inflexibility can affect multiple domains of functioning and family life. The objective of this study was to develop and validate a clinical interview version of the Behavioral Inflexibility Scale. Trained interviewers conducted interviews with parents of 144 children with ASD and 70 typically developing children (ages: 3-17 years). Using exploratory factor analysis, the Behavioral Inflexibility Scale-Clinical Interview (BIS-CI) was found to be unidimensional. Reliability data indicated the measure was internally consistent (α = 0.80), achieved excellent inter-rater reliability (ICC = 0.97) and test-retest reliability (ICC = 0.87). These findings demonstrate that the BIS-CI is a reliable and valid measure to determine the functional impact of behavioral inflexibility.
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