Question: Meta - analysis - Mean effect size In 2 0 0 8 , a group of researchers from the University of Murcia in Spain performed

Meta-analysis - Mean effect size
In 2008, a group of researchers from the University of Murcia in Spain performed a meta-analysis study of the benefits of cognitive-behavioral treatment for obsessive-compulsive disorder (OCD). In their study, 24 independent experimental studies involving a total of 752 subjects were compared using meta-analysis techniques. For each trial, outcome measures were identified for subjects in both control and experimental groups, and the effect sizes (standardized mean differences between treatment and control) and standard errors were calculated for each study. [Source: RosaAlczar, A., Snchez-Meca, J., Gmez-Conesa, A., & Marn-Martnez, F.(2008). Psychological treatment of obsessive-compulsive disorder: A metaanalysis. Clinical Psychology Review, 28(8),1310-1325.]
Suppose you conduct a similar review using 8 studies, resulting in an effect size, d, and a standard error sd for each study. The data is shown in the following table. For each study, calculate the 95% confidence limits of the effect size. Enter your results into the table.
Note: A positive effect size indicates a favorable outcome to the treatment (that is, a positive effect) and a negative effect size indicates a favorable outcome to the control (that is; a negative effect).
\table[[Study,d,sd,CI ?lower,CI ?upper
Meta - analysis - Mean effect size In 2 0 0 8 , a

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