AUTHORS: Hnilicová, S., Celušáková, H., Hnilica, P., Babinská, K., Pivovarčiová, A., Ostatníková, D. ABSTRACT: OBJECTIVES: The aim of our study was to assess efficacy of using M-CHAT R/F questionnaire for screening for Autism Spectrum Disorders (ASD) in a sample of Slovak population and compare it with objective diagnostic ASD tool ADI-R. M-CHAT R/T comparison with