PSYC2101 Lecture Notes - Lecture 19: Mental Disorder, Meta-Analysis, Clinical Trial
Document Summary
In 2018, there were over 500 controlled clinical trials of efficacy of cbt in various psychiatric. Most studies conclude efficacy of cbt intervention over placebo or alternative control. Recent review of meta-analyses for cbt interventions (butler et al. , 2006, clin psych rev) In a meta-analysis, data is derived from all controlled clinical trials of cbt within a psyc. Effect of intervention is converted to a standardized measure of the effect of the inter expressed as effect size. Effect size: magnitude of observed effect in standard unit of measurement. Analysis of heterogeneity of variance of effect sizes. Another study by carpenter et al. , in 2017 looked at the effect sizes of cbt for anxiety disord. Overall effect size on target symptoms =0. 56, a moderate effect. Not enough direct comparison rcts as yet atric disorders trol condition psychiatric disorder ntervention (standard deviation or correlation coefficient) isorder. Some evidence that relapse rates significantly reduced with cbt for depression (compared to.
