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	Ordinal nomologisk validitet	Testning av invarians för ordinala mätningar
Ämnesområde	Psykometri	Psykometri
Familj	Latent structure	Latent structure
Ursprungsår	1955 (concept); ordinal application 1990s–present	1984–2011
Upphovsperson	Cronbach & Meehl (nomological network concept); ordinal extension in modern psychometrics	Roger Millsap; Bengt Muthén
Typ	Validity assessment	Multi-group model comparison
Ursprungskälla	Cronbach, L. J., & Meehl, P. E. (1955). Construct validity in psychological tests. Psychological Bulletin, 52(4), 281–302.	Millsap, R. E. (2011). Statistical Approaches to Measurement Invariance. Routledge. ISBN: 978-1848728936
Alias	nomological validity for ordinal data, ordinal nomological network, construct network validity (ordinal), ordinal criterion-related validity	ordinal MI, measurement invariance for ordinal data, ordinal CFA invariance, categorical measurement invariance
Närliggande	5	6
Sammanfattning	Ordinal nomological validity examines whether a construct measured with ordinal items (e.g., Likert-type scales) behaves in theoretically predicted ways within a nomological network — a web of expected relationships with other constructs and criteria — using methods suited to ordinal data rather than assuming continuous measurement.	Ordinal measurement invariance testing evaluates whether a multi-group confirmatory factor model holds equivalent measurement properties across groups when scale items are ordinal — such as Likert-type response scales. It uses polychoric correlations and categorical estimators (WLSMV/DWLS) rather than Pearson-based methods, correcting the systematic bias that arises when ordinal data are treated as continuous.