विधियों की तुलना करें

	राश मॉडल	क्रोनबैक का अल्फा (विश्वसनीयता विश्लेषण)
क्षेत्र	मनोमिति	सांख्यिकी
परिवार	Latent structure	Latent structure
उद्भव वर्ष	1960	1951
प्रवर्तक	Georg Rasch	Lee J. Cronbach
प्रकार	Item Response Theory / Latent trait model	Reliability / internal consistency coefficient
मौलिक स्रोत	Rasch, G. (1960). Probabilistic Models for Some Intelligence and Attainment Tests. Danish Institute for Educational Research, Copenhagen.	Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334.
उपनाम	1PL IRT, one-parameter logistic model, Rasch Modeli — 1PL IRT, 1PL model	coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha)
संबंधित	6	4
सारांश	The Rasch model, introduced by Georg Rasch in 1960, is the simplest member of the Item Response Theory (IRT) family. It assigns a single difficulty parameter to each test item and places both item difficulties and person abilities on the same logit scale, enabling direct, sample-independent comparison of items and persons.	Cronbach's alpha is a coefficient of internal consistency that quantifies the degree to which a set of items on a scale measures the same underlying construct. Introduced by Lee J. Cronbach in 1951, it remains the most widely reported reliability index in social-science, health, and educational research.