SNAP-IV (Core 26-item)

The SNAP-IV core 26-item form covers the DSM-IV symptom items for ADHD-Inattention, ADHD-Hyperactivity/Impulsivity, and Oppositional Defiant Disorder, completed by a parent or teacher about the child. It is the compact symptom-focused subset of Swanson's full SNAP-IV rating scale, which revised the earlier Swanson, Nolan and Pelham (SNAP) Questionnaire (Swanson et al., 1983).

As on the source scoring page, each item is rated 0–3 and each subscale score is the average rating per item. The tentative 5% cutoffs are rater-specific — teacher and parent thresholds differ — and the rater-appropriate values are shown with the score bands on this page. A score above a cutoff flags a symptom domain for clinical attention; it is not a diagnosis.

“Often fails to give close attention to details or makes careless mistakes in schoolwork or tasks”

Illustrative only. During administration items are presented one screen-set at a time; response-key direction is never shown to respondents.

Item responses are summed within each scale (reverse-keyed items recoded first) and expressed as a percent of the maximum possible score. No normative percentile is applied — there is no verbatim-matched published norm for this exact item set.

Swanson, J. M. The SNAP-IV Teacher and Parent Rating Scale. James M. Swanson, Ph.D., University of California, Irvine, CA 92715. A revision of the Swanson, Nolan and Pelham (SNAP) Questionnaire (Swanson et al., 1983); items drawn from the DSM-IV (1994) criteria for ADHD and Oppositional Defiant Disorder, the Conners Index (Conners, 1968), and the IOWA Conners (Loney & Milich, 1985).

Scoring. Scoring (source scoring page): each subscale score is the sum of its item scores divided by the number of items — the Average Rating-Per-Item on the 0–3 scale (Not At All=0, Just A Little=1, Quite A Bit=2, Very Much=3). Worked example on the source page: ADHD-Inattention total 18 / 9 items = 2.0. Tentative 5% cutoffs (Teacher / Parent): ADHD-Inattention 2.56 / 1.78; ADHD-Hyperactivity–Impulsivity 1.78 / 1.44; ADHD-Combined 2.00 / 1.67; ODD 1.38 / 1.88. The source defines no cutoff for the I/O, A/D, Conners Index, or SKAMP subscales.

James M. Swanson, Ph.D., University of California, Irvine. Reproduced for clinical and research use.