Abstract
A criticism is offered for the recent efforts to encourage psychologists to report the proportion of variance accounted for (ω2 ) by analysis of variance effects. Few psychological experiments employ designs that allow legitimate inferences as to the strength of particular effects. As such, ω2 is a descriptive statistic that is extremely limited in its usefulness. It is suggested that a widespread reporting of ω2 in psychology is not only unnecessary, but could also be misleading.
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