On What Effect Size Tells Us: PCIT has twice the effect of stimulant medication on disruptive behavior

Parent Child Interaction Therapy has twice the effect size of stimulant medication over disruptive behavior, as Dr John-Paul Abner coneys in this recent PCIT conference video clip.-gw

Effect size is a simple way of quantifying the difference between two groups that has many advantages over the use of tests of statistical significance alone. Effect size emphasises the size of the difference

It's the Effect Size, Stupid: What effect size is and why it is important

Dr Abner's explanation of effect size