Statistical tests conducted with school environment data : the effect of teachers being clustered in schools
This article discusses the effect of clustering on statistical tests conducted with school environment data. Because most school environment studies involve the collection of data from teachers nested within schools, the hierarchical nature to these data cannot be ignored. In particular, this articl...
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Published in | Learning environments research Vol. 12; no. 2; pp. 85 - 99 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
01.07.2009
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | This article discusses the effect of clustering on statistical tests conducted with school environment data. Because most school environment studies involve the collection of data from teachers nested within schools, the hierarchical nature to these data cannot be ignored. In particular, this article considers the influence of intraschool correlations on tests of statistical significance conducted with the individual teacher as the unit of analysis. Theory that adjusts t test scores for nested data in two-group comparisons is presented and applied to school environment data. This article demonstrates that Type 1 error rates inflate greatly as the intraschool correlation increases. Because data analysis techniques that recognise the clustering of teachers in schools are essential, it is recommended that either multilevel analysis or adjustments to statistical parameters be undertaken in school environment studies involving nested data. [Author abstract] |
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Bibliography: | Refereed article. Includes bibliographical references. Learning Environments Research; v.12 n.2 p.85-99; 2009 |
ISSN: | 1387-1579 1573-1855 |
DOI: | 10.1007/s10984-009-9054-y |