Ritvo Autism Asperger Diagnostic Scale–Revised (RAADS–R)
The Ritvo Autism Asperger Diagnostic Scale–Revised (RAADS–R) is a self-report questionnaire designed to identify adult autistics who “escape diagnosis” due to a subclinical level presentation.
The RAADS–R is a self-report instrument. However, the authors mention that a clinician might help a participant interpret items if they have difficulty understanding the question. The RAADS-R is denied for individuals aged 16+ with an IQ within the Average range (above 80).
The RAADS-R is useful in identifying autistic traits and as a screening instrument but not as a diagnostic tool.
The test assesses developmental symptoms correlating with the three DSM-5 diagnostic categories (Language, Social relatedness, Sensory–motor) as well as a fourth subscale, Circumscribed interests. It consists of 80 statements, giving you 4 choices for each statement:
True now and when I was young
True now only
True only when I was younger than 16
Never true