MEANING
A numerical measure of the magnitude of a difference or relationship, not simply whether it is statistically detectable.
Use it for
Name the magnitude of a finding rather than its statistical significance alone.Use when reporting the magnitude of a finding separately from its p value or statistical significance.
Words that belong together
- calculate an effect size
- report effect sizes
- standardized effect size
On the page
The report gave an effect size beside each p value.
Word forms
- Base
- effect size
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Usage notes
Effect sizes describe magnitude; they should be interpreted in context and do not by themselves establish practical importance or causality.
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