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	दीर्घकालिक पुष्टिकारी कारक विश्लेषण (Longitudinal Confirmatory Factor Analysis)	अनुदैर्ध्य मापन निश्चरता परीक्षण
क्षेत्र	मनोमिति	मनोमिति
परिवार	Latent structure	Latent structure
उद्भव वर्ष	1970s–1990s	1993
प्रवर्तक	Karl Jöreskog (CFA framework); longitudinal extension by Wheaton, Muthén, and Alwin in the 1970s–1990s	William Meredith
प्रकार	Longitudinal latent variable / measurement model	Measurement model testing
मौलिक स्रोत	Widaman, K. F. & Reise, S. P. (1997). Exploring the measurement invariance of psychological instruments: Applications in the substance use domain. In K. J. Bryant, M. Windle & S. G. West (Eds.), The science of prevention: Methodological advances from alcohol and substance abuse research (pp. 281–324). American Psychological Association.	Meredith, W. (1993). Measurement invariance, factor analysis and factorial invariance. Psychometrika, 58(4), 525–543.
उपनाम	longitudinal CFA, repeated-measures CFA, longitudinal measurement model, panel CFA	LMI, longitudinal invariance, measurement equivalence across time, temporal measurement invariance
संबंधित	6	3
सारांश	Longitudinal confirmatory factor analysis (longitudinal CFA) applies a theoretically specified measurement model to data collected at two or more time points. Its primary purpose is to verify that a scale measures the same latent construct in the same way over time — a prerequisite for drawing valid conclusions about change from repeated-measures data.	Longitudinal measurement invariance testing determines whether a psychological scale measures the same construct in the same way across two or more time points. It is a prerequisite for interpreting mean-level change scores in panel and repeated-measures studies, ensuring that observed change reflects true change in the construct rather than drift in the measurement instrument.