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| Teoria generalizowalności wielogrupowej× | Wielogrupowa Alfa Cronbacha× | |
|---|---|---|
| Dziedzina | Psychometria | Psychometria |
| Rodzina | Latent structure | Latent structure |
| Rok powstania≠ | 1963–2001 | 1951 (alpha); multi-group application from 1980s onward |
| Twórca≠ | Lee J. Cronbach and colleagues (Cronbach, Gleser, Nanda, Rajaratnam), extended to multi-group contexts by Brennan and others | Lee J. Cronbach (alpha); multi-group extension in cross-cultural and measurement invariance research |
| Typ≠ | Variance component / reliability generalization | Reliability / internal consistency comparison |
| Źródło pierwotne≠ | Brennan, R. L. (2001). Generalizability Theory. Springer. ISBN: 978-0387952826 | Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334. DOI ↗ |
| Inne nazwy | MG G-theory, multi-group G-theory, generalizability theory across groups, cross-group G-study | group-stratified alpha, cross-group alpha comparison, subgroup internal consistency, MG-alpha |
| Pokrewne≠ | 6 | 4 |
| Podsumowanie≠ | Multi-group generalizability theory (MG G-theory) extends classical generalizability theory to estimate and compare variance components — attributable to persons, items, raters, occasions, and their interactions — simultaneously across two or more defined groups. It reveals whether a measurement procedure is equally reliable and generalizable for every group studied, supporting fair and equitable score interpretation. | Multi-group Cronbach's alpha estimates and compares the internal consistency reliability of a scale separately within each of two or more defined subgroups. It is used in cross-cultural, demographic, and comparative psychometric research to establish that a scale measures its construct with equivalent precision across groups before making cross-group comparisons. |
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