Examining the Psychometric Properties of the SRSS-IE With the Nominal Response Model Within a Middle School Sample

Abstract

This study examined the item and category response option functioning of items on the Student Risk Screening Scale for Internalizing and Externalizing Behaviors (SRSS-IE), using item response theory (IRT) methods with a sample of 2,122 middle school students. The SRSS-IE is a screening instrument used to identify students who are potentially at risk for emotional and behavioral disorders (EBD). Utilizing the nominal response and generalized partial credit models of IRT, items from the SRSS-IE were evaluated in terms of the degree to which the response options for each item functioned as intended and how well those response options discriminated among students who exhibited varying levels of EBD risk. Results indicate that the four-response option configuration used in this study may not adequately discriminate regarding the frequency of externalizing and internalizing behaviors demonstrated by middle school students. Recommendations for revising the response options and scoring procedures are discussed.