11. He collaborated with Samuel Messick at the Educational Testing Service, examining construct validity . 12. Construct validity evidence involves the empirical and theoretical support for the interpretation of the construct.13. There are three variants of construct validity . 14. Construct validity is also a direct reflection of the quality of one s operational definitions.15. There are six aspects of construct validity in Messick s Unified Theory of Construct Validity. 16. There are six aspects of construct validity in Messick s Unified Theory of Construct Validity . 17. An in-depth exploration of the threats to construct validity is presented in Trochim. 18. Construct validity is particularly important in the social sciences, psychology, psychometrics and language studies.19. How construct validity should be properly viewed is still a subject of debate for validity theorists. 20. Results show correlations upwards from 0.85 which indicate the construct validity of Sell s scale.