The Swanson, Nolan and Pelham Teacher and Parent Rating Scale (SNAP), developed by James Swanson, Edith Nolan and William Pelham, is a 90-question self-report inventory designed to measure attention deficit hyperactivity disorder (ADHD) and oppositional defiant disorder (ODD) symptoms in children and young adults.
Contents
- Question breakdown scoring and interpretation
- Domain breakdown
- Interpretation of subscale scores
- References
Each question measures the frequency of a variety of symptoms or behaviors, in which the respondent indicates whether the behavior occurs "not at all", "just a little", "quite a bit", or "very much". The questionnaire takes about 10 minutes to complete and is designed for use with children and young adults ages 6–18. The questionnaire is currently in its 4th version, and its scores have shown good reliability and validity across multiple different study samples.
Question breakdown, scoring and interpretation
Scoring the SNAP-IV is based on a 0-3 scale, with each question being scored as follows based on participant response:
Domain breakdown
The questions measure different domains of ADHD and ODD. The item breakdown is as follows:
Interpretation of subscale scores
Subscale scores add all scores on the items in the subset and divided by the total number of items in the subset. Subscale score cutoffs for the disorders are as follows: