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First published on February 29, 2008
Assessment 2008, doi:10.1177/1073191107313888
© 2008 SAGE Publications

Article

Parent and Teacher SNAP-IV Ratings of Attention Deficit Hyperactivity Disorder Symptoms: Psychometric Properties and Normative Ratings From a School District Sample

Regina Bussing, M.D., M.S.H.S.1*, Melanie Fernandez, Ph.D.1, Michelle Harwood, Ph.D.1, Wei Hou, Ph.D.1, Cynthia Wilson Garvan, Ph.D.1, Sheila M. Eyberg, Ph.D.1, and James M. Swanson, Ph.D.2

1 University of Florida
2 University of California, Irvine

* To whom correspondence should be addressed. E-mail: rbussing{at}psychiatry.ufl.edu.


  Abstract
To examine Swanson, Nolan, and Pelham–IV (SNAP-IV) psychometric properties, parent (N = 1,613) and teacher (N = 1,205) data were collected from a random elementary school student sample in a longitudinal attention deficit hyperactivity disorder (ADHD) detection study. SNAP-IV reliability was acceptable. Factor structure indicated two ADHD factors and an oppositional defiant disorder (ODD) factor. Parent and teacher scores varied by gender and poverty status (d = .49-.56) but not age; only teacher scores varied by race (d = .25-.55). Screening and diagnostic utility was evaluated with likelihood ratios (LRs) and posttest probabilities. Parent SNAP-IV scores above 1.2 increased probability of concern (LR > 10) and above 1.8, of ADHD diagnosis (LR > 3). Teacher hyperactivity/impulsivity scores above 1.2 and inattention scores above 1.8 increased probabilities of concern only (LR = 4.2 and >5, respectively). Higher teacher scores for African American children and race differences in measurement models require future study.


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