SNAP-IV

Validated

Swanson, Nolan and Pelham Rating Scale (SNAP-IV 26-item)

6 – 18 yearsParent, Teacher~7 min26 questions

For each item, choose how well it describes the child over the past 6 months. Answer separately for home (parent) and school (teacher) — completing both gives the most useful picture.

Who is rating?

Report details · optional

Patient initials / IDCompleted byDate

Shown on the report and stored with the screening record. Use initials or a code, not full names.

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About this screener — evidence, source, alternatives

A 26-item rating scale built on the DSM ADHD and oppositional defiant disorder symptom lists, widely used in research (it was the core measure of the NIMH MTA study) and clinical practice. Parent and teacher versions use the same items with different cut-offs, so you can compare across settings — ADHD requires symptoms in two or more settings.

Evidence · validated

Good internal consistency (α ≈ 0.94 inattention, 0.92 hyperactivity/impulsivity, 0.96 ODD in Bussing et al., 2008) and normative data from a large US school sample. Cut-offs below mark roughly the 95th percentile.

Free alternative to

Vanderbilt ADHD Diagnostic Rating Scales · AAP / NICHQ
Same DSM symptom foundation used by the common paid/toolkit scales — SNAP-IV is the public-domain equivalent.
Conners 4 / ADHD Rating Scale-5 · MHS / Guilford
Multi-informant parent + teacher rating approach.

Source & licence

Swanson JM et al. SNAP-IV 26-item Teacher and Parent Rating Scale; Bussing R et al. Parent and teacher SNAP-IV ratings of ADHD symptoms: psychometric properties and normative ratings. Assessment. 2008;15(3):317–328.

Licence: Public domain (released by J. M. Swanson)

Official source ↗