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| Ординална алфа на Кронбах× | Анализ на ординални елементи× | |
|---|---|---|
| Област | Психометрия | Психометрия |
| Семейство | Latent structure | Latent structure |
| Година на възникване≠ | 2007 | 1950s–1980s |
| Създател≠ | Zumbo, Gadermann, and Zeisser | Classical test theory tradition (Guilford, Nunnally, and others) |
| Тип≠ | Internal consistency reliability coefficient | Item-level diagnostic |
| Основополагащ източник≠ | Zumbo, B. D., Gadermann, A. M., & Zeisser, C. (2007). Ordinal versions of coefficients alpha and theta for Likert rating scales. Journal of Modern Applied Statistical Methods, 6(1), 21–29. DOI ↗ | Nunnally, J. C. & Bernstein, I. H. (1994). Psychometric Theory (3rd ed.). McGraw-Hill. ISBN: 978-0070474659 |
| Други названия | alpha for ordinal data, polychoric alpha, ordinal reliability coefficient, alpha based on polychoric correlations | item analysis for ordinal data, polytomous item analysis, Likert item analysis, OIA |
| Свързани≠ | 3 | 6 |
| Резюме≠ | Ordinal Cronbach's alpha is a reliability coefficient computed from polychoric or polyserial correlations rather than Pearson correlations, making it appropriate for Likert-type and other ordinal item response data. It corrects the systematic downward bias that standard Cronbach's alpha produces when items are treated as continuous but are actually ordinal. | Ordinal item analysis evaluates each individual item in a rating-scale or Likert-type instrument using descriptive and correlational statistics suited to ordered categorical response formats. It guides item selection and refinement by flagging items with problematic difficulty, poor discrimination, or low corrected item-total correlations before reliability and validity studies proceed. |
| ScholarGateНабор от данни ↗ |
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