Differential Item and Test Functioning of the SRSS-IE12 Across Race, Ethnicity, Gender, and Elementary Level

Abstract

This study used item response theory (IRT) methods to investigate group differences in responses to the 12-item Student Risk Screening Scale-Internalizing and Externalizing (SRSS-IE12) in a sample of 3,837 elementary school students. Using factor analysis and graded response models from IRT methods, we examined the factor structure, and item and test functioning of the SRSS-IE12. The SRSS-IE12 internalizing and externalizing factors reflected the hypothesized two-factor model. IRT analyses indicated that SRSS-IE12 items and tests measure internalizing and externalizing traits similarly across students from different race, ethnicity, gender, and elementary level (K-2 vs. 3-5) groups. Moreover, the mostly negligible differential item functioning (DIF) and differential test functioning (DTF) observed suggest these scales render equitable trait ratings. Collectively, the results provide further support for the SRSS-IE12 for universal screening in racially diverse elementary schools.