In review studies making use of the meta-analysis technique,it is common for researchers to calculate the ___________________ statistic as a measure of treatment effectiveness.

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Meta-analysis involves combining the results of multiple studies to obtain a more reliable estimate of treatment effectiveness. The effect size statistic is the most commonly used measure of treatment effectiveness in meta-analysis. It represents the standardized difference in outcomes between the treatment and control groups, and reflects the magnitude of the intervention's impact. Other options, such as correlation or common factors, are not appropriate for measuring treatment effectiveness in this context.

In Review Studies Making Use of the Meta-Analysis Technique,it Is