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	अनुदैर्ध्य पैमाना विकास	पुष्टिकारीय कारक विश्लेषण (CFA)
क्षेत्र	मनोमिति	मनोमिति
परिवार	Latent structure	Latent structure
उद्भव वर्ष	1990s–2000s	1969
प्रवर्तक	Meredith, Millsap, and colleagues	Karl Gustav Jöreskog
प्रकार	Scale construction framework	Hypothesis-testing latent variable model
मौलिक स्रोत	Millsap, R. E. (2011). Statistical Approaches to Measurement Invariance. Routledge. ISBN: 978-0805864311	Jöreskog, K. G. (1969). A general approach to confirmatory maximum likelihood factor analysis. Psychometrika, 34(2), 183–202.
उपनाम	LSD, longitudinal measurement development, repeated-measures scale construction, scale development with panel data	CFA, confirmatory FA, measurement model, restricted factor analysis
संबंधित	6	4
सारांश	Longitudinal scale development is the systematic process of constructing and validating a measurement instrument using data collected at multiple time points. It extends classical scale development by additionally testing whether the scale measures the same construct in the same metric across occasions, enabling valid tracking of change over time.	Confirmatory factor analysis tests a researcher-specified factor structure against observed data. Unlike exploratory approaches, the researcher decides in advance which indicators load on which latent factor, and the model is evaluated by how closely the implied covariance matrix reproduces the sample covariance matrix. CFA is central to scale validation, construct validity assessment, and measurement invariance testing.