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| Model s tri parametra logističke IRT (3PL)× | Cronbachov alfa (analiza pouzdanosti)× | |
|---|---|---|
| Područje≠ | Psihometrija | Statistika |
| Obitelj | Latent structure | Latent structure |
| Godina nastanka≠ | 1968 | 1951 |
| Tvorac≠ | Allan Birnbaum | Lee J. Cronbach |
| Vrsta≠ | Item response model / latent trait model | Reliability / internal consistency coefficient |
| Temeljni izvor≠ | Birnbaum, A. (1968). Some latent trait models and their use in inferring an examinee's ability. In F. M. Lord & M. R. Novick (Eds.), Statistical theories of mental test scores (pp. 397–479). Addison-Wesley. link ↗ | Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334. DOI ↗ |
| Drugi nazivi | 3PL IRT — Üç Parametreli Madde Tepki Modeli, three-parameter logistic model, 3PLM, Birnbaum model | coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha) |
| Srodne≠ | 5 | 4 |
| Sažetak≠ | The three-parameter logistic (3PL) model, introduced by Allan Birnbaum in 1968, is an item response theory model that describes the probability of a correct response to a binary test item as a function of three item-level parameters — difficulty, discrimination, and a lower asymptote representing guessing — and one person-level parameter representing latent ability. | 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. |
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