השוואת שיטות
סקרו את השיטות שבחרתם זו לצד זו; שורות שבהן יש הבדל מודגשות.
| אומגה מקדונלד האורכית× | ניתוח גורמים מאשר (CFA)× | אלפא של קרונבך (ניתוח מהימנות)× | |
|---|---|---|---|
| תחום≠ | פסיכומטריה | פסיכומטריה | סטטיסטיקה |
| משפחה | Latent structure | Latent structure | Latent structure |
| שנת המקור≠ | 1999 (original omega); 2014 (longitudinal extension) | 1969 | 1951 |
| הוגה השיטה≠ | McDonald (1999); extended to longitudinal contexts by Geldhof, Preacher, and Zyphur (2014) and subsequent authors | Karl Gustav Jöreskog | Lee J. Cronbach |
| סוג≠ | Reliability / internal consistency coefficient | Hypothesis-testing latent variable model | Reliability / internal consistency coefficient |
| מקור מכונן≠ | McDonald, R. P. (1999). Test Theory: A Unified Treatment. Lawrence Erlbaum Associates. ISBN: 978-0805830(textbook) | Jöreskog, K. G. (1969). A general approach to confirmatory maximum likelihood factor analysis. Psychometrika, 34(2), 183–202. DOI ↗ | Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334. DOI ↗ |
| כינויים | longitudinal omega, omega longitudinal reliability, time-varying omega, repeated-measures omega | CFA, confirmatory FA, measurement model, restricted factor analysis | coefficient alpha, alpha reliability, internal consistency reliability, Güvenilirlik Analizi (Cronbach Alpha) |
| קשורות≠ | 3 | 4 | 4 |
| תקציר≠ | Longitudinal McDonald's omega estimates scale reliability separately at each measurement occasion in a panel or repeated-measures study. By fitting a confirmatory factor model at each wave, it tracks how consistently a set of items measures its target construct over time, detecting erosion or improvement in measurement quality that a single omnibus reliability coefficient would obscure. | 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. | 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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