Literaturnachweis - Detailanzeige
| Autor/inn/en | Aydin, Burak; Leite, Walter L.; Algina, James |
|---|---|
| Titel | The Effects of Including Observed Means or Latent Means as Covariates in Multilevel Models for Cluster Randomized Trials |
| Quelle | In: Educational and Psychological Measurement, 76 (2016) 5, S.803-823 (21 Seiten)Infoseite zur Zeitschrift
PDF als Volltext |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 0013-1644 |
| DOI | 10.1177/0013164415618705 |
| Schlagwörter | Error of Measurement; Predictor Variables; Randomized Controlled Trials; Experimental Groups; Control Groups; Comparative Analysis; Hierarchical Linear Modeling; Monte Carlo Methods; Simulation; Correlation; Statistics; Error Correction; Item Response Theory; Statistical Analysis; Structural Equation Models; Equations (Mathematics); Maximum Likelihood Statistics |
| Abstract | We investigated methods of including covariates in two-level models for cluster randomized trials to increase power to detect the treatment effect. We compared multilevel models that included either an observed cluster mean or a latent cluster mean as a covariate, as well as the effect of including Level 1 deviation scores in the model. A Monte Carlo simulation study was performed manipulating effect sizes, cluster sizes, number of clusters, intraclass correlation of the outcome, patterns of missing data, and the squared correlations between Level 1 and Level 2 covariates and the outcome. We found no substantial difference between models with observed means or latent means with respect to convergence, Type I error rates, coverage, and bias. However, coverage could fall outside of acceptable limits if a latent mean is included as a covariate when cluster sizes are small. In terms of statistical power, models with observed means performed similarly to models with latent means, but better when cluster sizes were small. A demonstration is provided using data from a study of the Tools for Getting Along intervention. (As Provided). |
| Anmerkungen | SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2020/1/01 |
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