Affiliation: University of Florida
- An alternative to Cohen's standardized mean difference effect size: a robust parameter and confidence interval in the two independent groups caseJames Algina
Department of Educational Psychology, University of Florida, Gainesville, FL 32611 7047, USA
Psychol Methods 10:317-28. 2005..Over the range of distributions and effect sizes investigated in the study, coverage probability was better for the percentile bootstrap confidence interval...
- The impact of omitting the interaction between crossed factors in cross-classified random effects modellingYuying Shi
University of Florida, Gainesville, Florida, USA
Br J Math Stat Psychol 63:1-15. 2010..We recommend that researchers attempt to include interaction effects of cross-classified factors in their models...
- Generalized eta and omega squared statistics: measures of effect size for some common research designsStephen Olejnik
Department of Educational Psychology, College of Education, University of Georgia, Athens, GA 30602 7143, USA
Psychol Methods 8:434-47. 2003..The present article provides formulas for computing generalized eta and omega squared statistics, which provide estimates of effect size that are comparable across a variety of research designs...
- Conducting power analyses for ANOVA and ANCOVA in between-subjects designsJames Algina
University of Florida, USA
Eval Health Prof 26:288-314. 2003..The authors present methods for conducting power analyses along with a discussion of these issues, and they make available SAS programs that can be used to implement the power analyses that are discussed...
- Adaptive robust estimation and testingH J Keselman
Department of Psychology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
Br J Math Stat Psychol 60:267-93. 2007..With regard to the power to detect non-null treatment effects, we found that the choice among the methods depended on the degree of non-normality and variance heterogeneity. Recommendations are offered...
- A generally robust approach for testing hypotheses and setting confidence intervals for effect sizesH J Keselman
Department of Psychology, University of Manitoba, 190 Dysart Road, Winnipeg, Manitoba, Canada
Psychol Methods 13:110-29. 2008..In an online supplement, the authors use several examples to illustrate the application of an SAS program to implement these statistical methods...