Objectives: Established scales for the early detection and general diagnostics of autism will be reviewed with a focus on the instruments available in German.
Methods: All questionnaires, observation scales and interviews for the assessment of autism and associated conditions found in a search of Medline, PsychInfo, Psyndex and Google up to May 2004 are quoted. Instruments adapted and developed for the German-speaking countries are presented in more depth.
Results: An increasing number of reliable national and international scales for the assessment of disorders of the autism spectrum are available. Currently a combination of the Social Communication Questionnaire (SCQ), the Autism Diagnostic Observation Schedule (ADOS) and the Autism Diagnostic Interview-Revised (ADI-R) is regarded as the standard for a psychometrically based diagnosis of autism.
Conclusions: For certain diagnostic groups and issues there continues to be a need for German-language instruments. Particularly scales for the assessment of the broader phenotype of autism, as well as instruments that are more sensitive to change would be desirable for outcome measurement and intervention evaluation.