Gilliam Autism Rating Scale – 3rd Edition (GARS-3)

The GARS-3 helps identify autism, assess its severity, and determine the appropriate intervention. Items in the third edition of this widely used test reflect criteria for diagnosing Autism Spectrum Disorder (ASD) found in the new Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5). Fifty-six items clearly describe typical behaviors of individuals with ASD and are grouped into six subscales: (1) Restrictive and Repetitive Behaviors; (2) Social Interaction, (3) Social Communication, (4) Emotional Responses, (5) Cognitive Style, and (6) Maladaptive Speech Administration of the GARS-3 provides standard scores, percentile ranks, severity level, and probability of autism.