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Assessment
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Parent and Teacher SNAP-IV Ratings of Attention Deficit Hyperactivity Disorder Symptoms

Psychometric Properties and Normative Ratings From a School District Sample

Regina Bussing

University of Florida, rbussing{at}psychiatry.ufl.edu

Melanie Fernandez

University of Florida

Michelle Harwood

University of Florida

Wei Hou

University of Florida

Cynthia Wilson Garvan

University of Florida

Sheila M. Eyberg

University of Florida

James M. Swanson

University of California, Irvine

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.

Key Words: assessment • attention deficit hyperactivity disorder • children • likelihood ratios • norms • SNAP-IV • reliability • validity

This version was published on September 1, 2008

Assessment, Vol. 15, No. 3, 317-328 (2008)
DOI: 10.1177/1073191107313888
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