Multitrait-Multimethod Analysis (MTMM)

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  • An approach to construct validation that examines the degree to which methods and constructs are distinguishable. The approach was first formalized by Campbell and Fiske (1959). In particular, an MTMM study provides evidence of the convergent and discriminant validity of a test that is designed to measure a particular construct of interest to a researcher. An MTMM study examines at least two different traits measured by at least two different methods. Measures of the same trait should converge (have strong positive correlations with one another). Measures of different traits should be “discriminant” (have low or zero correlations with one another or an inverse relation to one another if it is theoretically meaningful). Examining different methods provides evidence of the robustness of a construct to different ...

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