Convergent validity and divergent validity were studied in several basic skill areas using the multitrait-multimethod procedure outlined by D. T. Campbell and D. W. Fiske (1959). The academic skill domains considered were: (1) reading; (2) mathematics; (3) writing and language arts; and (4) spelling. A total of 297 students in grades 1 through 5…

This study investigated construct validity and factorial invariance of a performance assessment of reading comprehension and writing proficiency through a multitrait-multimethod (MTMM) structure using confirmatory factor analysis. The performance assessment was administered to 1,023 fifth and sixth graders. Interrater reliability was examined for…