What are some examples of effect size in research?
Effect size is a quantitative measure of the magnitude of a phenomenon. Common examples include Cohen's d, Pearson's r, and odds ratios.
Can you explain Cohen's d with an example?
Sure! Cohen's d measures the difference between two means. For instance, if the average test score of Group A is 80 and Group B is 70, Cohen's d would quantify how large that difference is.
What does a small, medium, and large effect size mean?
A small effect size (around 0.2) indicates a minor difference, medium (around 0.5) suggests a moderate difference, and large (0.8 or more) indicates a significant difference between groups.
How is effect size used in meta-analysis?
In meta-analysis, effect size allows researchers to combine results from different studies, providing a clearer overall picture of the effect being studied.
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