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Psychiatr Prax. 2014 Jan;41(1):37-44. doi: 10.1055/s-0033-1343193. Epub 2013 May 16.

[Psychometric properties of the Autism-Checklist (ACL) in adults with intellectual disability].

[Article in German]

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Abteilung für Psychiatrie, Psychotherapie und Psychosomatik, Evangelisches Krankenhaus Königin Elisabeth Herzberge, Berlin.



To determine the validity of the Autism-Checklist (ACL) in adults with intellectual disability (ID) who are suspected of having autism spectrum disorder.


In 154 adults with ID the results of the ACL were compared to the results of the final diagnostic classification obtained by a multiprofessional case conference for autism. Psychometric properties of the ACL were evaluated.


The internal consistency as indicated by Cronbach's alpha was 0.81. The ACL sum score highly correlated with established screening measures such as the Social Communication Questionnaire (SCQ: Spearman's rho = 0.620) and the Pervasive Developmental Disorder in Mental Retardation Scale (PDD-MRS: Spearman's rho = 0.490). ROC Analysis revealed an area under the curve of 0.859. The ACL classification complied with the final diagnostic classification in 80.5 % and Cohen's kappa revealed a moderate agreement of 0.596. Sensitivity/specificity of the ACL were 90.7 %/67.6 %, respectively. Interrater-intertime reliability was good (Cohen's kappa = 0.702; Spearman = 0.549; n = 53). In 19 patients (22 %) a diagnosis of ASD had been given prior to referral.


The ACL is a suitable measure for adults with ID and suspicion of autism spectrum disorders.

[Indexed for MEDLINE]

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