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Results tagged with cohens-d
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Cohen's d is a generalized effect size measure. It is the difference between two group means scaled by the combined standard deviation. Cohen's d is used frequently in Jacob Cohen's text on power analysis, mostly to simplify the presentation of tables.
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Cohen's d calculation when within group variance is zero
In your case --- because both samples have zero variance --- the denominator in the formula for Cohen's d will be zero. Reporting the result as "infinite" may be the only option.
As a side note, sin …
- 11.6k
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Accepted
Converting between correlation and effect size (Cohen's d)
The relationship described for Cohen's d and Pearson's r isn't for paired data. It's for unpaired data. For r, one variable is the two groups and the other is measurement variable. I've attached a p …
- 11.6k
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Cohen's D on transformed data for effect sizes
Answer based on my comment:
Cohen's d doesn't make any inferences, and so doesn't have "assumptions" about the distribution of the data (or population). It simply calculates the difference in means an …
- 11.6k
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Effect size interpretation for Cliff's delta similar to Cohen's "small, medium and large eff...
Vargha and Delaney (2000) give interpretations of their A statistic:
small, >= 0.56; medium, >= 0.64; large, >= 0.71
The corresponding values they give for Cliff's delta are:
small, >= 0.11; medium …
- 11.6k
3
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How do I convert Cramer's V to Cohen's d?
There is no general method to convert Cramér's V to Cohen's d.
Both statistics are considered effect size statistics, but they convey different kinds of information.
Cohen's d compares values from a …
- 11.6k
2
votes
Accepted
How to Simulate T-Values for Two Different Samples
The following is R code to explore the difference in Cohen's d for two samples of different size, both selected from the same population. (Here, normal with mean = Mean, sd = SD, and sample sizes, Sma …
- 11.6k
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Converting unstandardised regression coefficients to Cohen's d for meta-analysis
Cohen's d compares the means of two groups, specifically standardized relative to the standard deviation of these groups.
With two continuous variables, standardized effect size statistics would inclu …
- 11.6k