P-LESS-THAN.05 - BUT IS IT CLINICALLY SIGNIFICANT - PRACTICAL EXAMPLES FOR CLINICIAN

Authors
Citation
S. Matthey, P-LESS-THAN.05 - BUT IS IT CLINICALLY SIGNIFICANT - PRACTICAL EXAMPLES FOR CLINICIAN, Behaviour change, 15(2), 1998, pp. 140-146
Citations number
21
Categorie Soggetti
Psycology, Clinical
Journal title
ISSN journal
08134839
Volume
15
Issue
2
Year of publication
1998
Pages
140 - 146
Database
ISI
SICI code
0813-4839(1998)15:2<140:P-BIIC>2.0.ZU;2-R
Abstract
Many researchers report the p value of an analysis to communicate whet her findings an: significant. This may be misinterpreted to imply that if p < .05 the finding is also of clinical significance. Researchers should also report the magnitude of the association, an easily calcula ted statistic, to allow a better understanding of results when p < .05 . Methods for doing this for t, chi(2), and F values are given. The cl inical significance of an intervention is also commonly determined by whether p < .05. A better understanding, however, is gained by then ca lculating the effect size (d). This measure enables effects and streng ths of association to be compared among studies. Methods for doing thi s, for the same statistics, are given.