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

Author(s) : James E. Gilliam

Publisher : Pro-Ed USA, 2015


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SKU : 992ADH

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ADHDT-2 Manual

SKU : 502ADH

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ADHDT-2 Summary/Response Forms (pkg 50)

SKU : 602ADH

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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.
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James E. Gilliam

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