This study investigated the differential predictive validity of the Developing Cognitive Abilities Test (DCAT) in a heterogeneous sample of 863 sixth-grade students. Bias was assessed across gender, race/ethnicity, and socioeconomic dimensions. Level H of the DCAT was administered during the students' sixth-grade year, and selected subtests from the Iowa Tests of Basic Skills (ITBS) were administered 8 months later during their seventh-grade year. Overall, results indicated a general lack of bias in the DCAT in predicting ITBS scores across gender, race/ethnicity, and socioeconomic groups.