Hedges’s g

an effect size measure that represents the standardized difference between means. Hedges’s g differs from the more widely used Cohen’s d in that, whereas both use a pooled standard deviation in the denominator, the former uses n – 1 and the latter uses n when calculating the standard deviations. Thus, Hedges’s g tends to be considered as having less bias than Cohen’s d. See also Glass’s d. [Larry V. Hedges, U.S. statistician]

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Psychology term of the day

May 8th 2024

word-length effect

in a test of memory span, the fact that one can usually remember a greater number of shorter words than longer words. Short-term retention is affected by the length of time it takes to rehearse the words.