Attention-Deficit/Hyperactivity Disorder Test - 2nd Edition (ADHDT-2)

Purpose: Help teachers, parents, and clinicians identify attention-deficit/hyperactivity disorder (ADHD) in individuals and estimate its severity
Age: 5-17 years
Time: 3-5 minutes

Based on the ADHD diagnostic criteria in the Diagnostic and Statistical Manual of Mental Disorders–Fifth Edition (DSM-5), the Attention-Deficit Hyperactivity Disorder Test 2nd ed. (ADHDT-2) can assist in estimating the severity of ADHD in children and adolescents from 5-17 years.

The test has 33 clearly stated items that describe the characteristic behaviours of persons with ADHD, with items grouped into two subscales: Inattention and Hyperactivity/Impulsivity. It yields standard scores, percentile ranks, severity levels, and probability of ADHD.

New Features of the ADHDT-2:

• Items and subscales reflect DSM-5 diagnostic criteria for ADHD
• The Hyperactivity and Impulsivity subscales were merged into one subscale
• The overall number of items was reduced to 33
• An interpretation guide in the Examiner’s Manual allows the examiner an easy and efficient method for assessing the probability of attention-deficit/hyperactivity disorder and the severity of the disorder
• Internal consistency (content sampling) reliability coefficients for the subscales exceed .85 and the ADHD Index exceeds .96.
• Test-retest (time sampling) reliability coefficients exceed .80 for subscales and .84 for the ADHD Index.
• Interrater reliability intraclass coefficients exceed .80 and .90 for the ADHD Index.
• Diagnostic accuracy studies indicate that the ADHDT-2 is able to discriminate children with attention-deficit/hyperactivity disorder from typical children without ADHD (i.e., sensitivity = .90, specificity = .82, ROC/AUC = .95.
• Confirmatory and exploratory factor analyses demonstrate the theoretical and empirical validity of the subscales.