Σύγκριση μεθόδων

	Διαχρονική Νομολογική Εγκυρότητα	Διακριτική Εγκυρότητα
Πεδίο	Ψυχομετρία	Ψυχομετρία
Οικογένεια	Latent structure	Latent structure
Έτος προέλευσης	1955 (concept); longitudinal extension 1990s–2000s	1959
Δημιουργός	Cronbach & Meehl (nomological network concept, 1955); longitudinal extension developed in organizational and personality research from the 1990s onward	Donald T. Campbell and Donald W. Fiske
Τύπος	Validity evaluation	Validity evidence / psychometric evaluation
Θεμελιώδης πηγή	Cronbach, L. J., & Meehl, P. E. (1955). Construct validity in psychological tests. Psychological Bulletin, 52(4), 281–302.	Campbell, D. T., & Fiske, D. W. (1959). Convergent and discriminant validation by the multitrait-multimethod matrix. Psychological Bulletin, 56(2), 81–105.
Εναλλακτικές ονομασίες	longitudinal construct validity, nomological network validation across time, longitudinal criterion-related validity, temporal nomological validity	discriminant validity evidence, divergent validity, DV, AVE-based discriminant validity
Συναφείς	6	5
Σύνοψη	Longitudinal nomological validity evaluates whether a construct's theoretically predicted relationships with other constructs hold consistently across multiple measurement occasions. It extends the nomological network framework of Cronbach and Meehl (1955) to longitudinal designs, testing whether a scale behaves as theory demands not only at a single time point but over time.	Discriminant validity is evidence that a latent construct is empirically distinct from other constructs it should differ from. Originating in Campbell and Fiske's multitrait-multimethod framework (1959), it is a core component of construct validity and a mandatory check in scale development and structural equation modeling.