Cultural Adaptation and Validation of the Modified Checklist for Autism in Toddlers, Revised with Follow-up in...

The prevalence of autism spectrum disorder is increasing worldwide, making screening and early intervention necessary. Several screening instruments have been developed in recent years. The Modified Checklist for Autism in Toddlers Revised with Follow-up (M-CHAT-R/F) is considered to be one of the specific measures designed to identify toddlers at risk for autistic spectrum disorder.

The aim of the study was to translate and adapt the original version of M-CHAT-R/F from the English to the Moroccan Arabic language.

Specialized translators and clinicians ensured forward and backward translation of the scale into Moroccan Arabic. Then, a two-stage screening of the M-CHAT-R/F-T was applied to a study sample comprised of 56 toddlers with autistic spectrum disorder (category I) and 96 toddlers with normal development (category II). "Kappa test", "Cronbach's alpha" test, the intra class correlation coefficient, and the area under the curve were determined.

The average score results of M-CHAT-R/F were 13.12 for category I, while it was 2.24 for category II. The Cronbach's alpha coefficient of the checklist was 0.929. The kappa values ranged from k=0.78 to k=0.97 with a confidence interval of 95% indicating good convergence. The intra-class correlation coefficient ranged from 0.97 to 0.99, which is excellent. The area under the curve in our study was 0.988, an excellent result.

Efficiency of the Moroccan Arabic version of the MCHAT was demonstrated for screening in the general population.