Adult ADHD Self-Report Scale (ASRS-18): Validity evidence, a proposed factor structure, measurement invariance, and screening utility in Brazilian adults

Attention-Deficit/Hyperactivity Disorder (ADHD) involves inattention and hyperactivity-impulsivity. The Adult ADHD Self-Report Scale (ASRS-18) is used for screening, but evidence in Brazilian adults remains limited. We examined the psychometric properties of the ASRS-18 in 805 Brazilian adults with and without a reported previous ADHD diagnosis. Results supported a two-factor structure (Inattention and Hyperactivity/Impulsivity) with acceptable CFI, TLI, and SRMR (CFI = .929; TLI = .919; SRMR =…

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