Meta-analysis of raw mean differences.
This article discusses the meta-analysis of raw mean differences. It presents a rationale for cumulating psychological effects in a raw metric and compares raw mean differences to standardized mean differences. Some limitations of standardization are noted, and statistical techniques for raw meta-analysis are described. These include a graphical device for decomposing effect sizes. Several illustrative data sets are analyzed.
Bond
Charles F
CF
Department of Psychology, Texas Christian University, Fort Worth, TX 76129, USA. c.bond@tcu.edu
Wiitala
Wyndy L
WL
Richard
F Dan
FD
D003627:Data Interpretation, Statistical; D006801:Humans; D015201:Meta-Analysis as Topic; D011594:Psychometrics / Q000706:statistics & numerical data; D011613:Psychotherapy / Q000706:statistics & numerical data*; D016032:Randomized Controlled Trials as Topic / Q000706:statistics & numerical data*; D015203:Reproducibility of Results