using item response theory in the development and validation of the college-oriented eating disorders screen开题资料.pdf

Eating Behaviors 4 (2003) 345–361
Using item response theory in the development and
validation of the College-Oriented Eating Disorders Screen
Jennifer A. Nowaka, Roxann Roberson-Naya, David R. Strongb,
Jennifer Bucceria, Carl W. Lejueza,*
aDepartment of Psychology, University of Maryland, College Park, MD 20742, USA
bBrown Medical School and Butler Hospital, USA
Accepted 22 July 2003
Abstract
The current study examined the psychometric characteristics of the College-Oriented Eating
Disorders Screen (COEDS), a college-student-focused screening measure to assess and identify
individuals at-risk for the development of eating disordered pathology. By screening a large pool of
pilot questions and using methods based in item response theory (IRT), seven items were identified
with well-targeted contents that discriminated well across the continuum of eating disorder severity.
The resulting measure evidenced a unidimensional factor structure and correlated highly with the
original COEDS, standard measures of eating disorders pathology, and a measure of associated
symptomatology (., depressive symptoms). Based on these results, we discuss the utility of the
COEDS as a prognostic indicator for risk of eating disordered pathology among college students.
D 2003 Elsevier Ltd. All rights reserved.
Keywords: Assessment; Vulnerability; College students; Item response theory
1. Introduction
Among the general population, estimates suggest a lifetime prevalence ranging from
% to % for clinical anorexia nervosa and % to % for clinical bulimia nervosa,
* Corresponding author. Tel.: +1-301-405-5932; fax: +1-301-314-9566.
E-mail address: ******@ (. Lejuez).
1471-0153/$ – see front matter D 2003 Elsevier Ltd. All rights reserved.
doi:-0153(03)00054-0
346 . N