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The phrase "average effect size" is correct and usable in written English.
It is typically used in statistical analysis and research to describe the magnitude of an effect or difference observed in a study.
Example: "The average effect size of the intervention was found to be significant, indicating a meaningful impact on the participants' outcomes."
Alternatives: "mean effect size" or "typical effect size".
Exact(60)
Between 1992 and 1997, the average effect size shrank by eighty per cent.
The remaining participants displayed an increase in peak velocity post-exercise with an average effect size of 0.19 ± 0.13.
Nine participants displayed a moderate decrease in antisaccade peak velocity (average effect size, 0.58 ± 0.58) with the placebo.
Findings demonstrated statistically significant but small average effect size and evidence of heterogeneity among studies.
The average effect size of the eight participants that displayed a drop in peak prosaccade velocity with placebo was 0.77 ± 0.41.
Two participants displayed a drop in prosaccade peak velocity following exercise, however, this was only of a small magnitude (average effect size, 0.09 ± 0.06).
The remaining three participants exhibited a small to moderate increase in peak velocity following exercise after placebo (average effect size, 0.29 ± 0.10).
Effect sizes differed dramatically among studies and the average effect size was close to zero (Zr = 0.04).
The average effect size estimate across all outcomes was small-to-moderate, Cohen's d = 0.38 (range = 0.00 to 0.88).
Analyzing data from 33 independent studies with over 19,000 people in aggregate, we found a moderate gender difference in moral identity that is on par with the average effect size uncovered in psychological research.
However, a large increase was evident in one participant (effect size >1.0), while the remaining nine participants exhibited only a small to moderate increase in velocity post exercise (average effect size, 0.24 ± 0.17).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com