%0 Journal Article %T Conceptual and Empirical Independence in Test Validation: a Note on Campbell and Fiske's 'Discriminant Validity %A Kroger, Rolf O. %J Educational and Psychological Measurement %V 28 %N 2 %P 383-387 %@ 0013-1644 %D 1968-07-01 %I Sage Publications %~ DeepDyve