Some explorations have been done on the relative effect size
for various categories of events. Deciding on the groupings
and on which category a given event fits is a largely
subjective matter, but it is an important issue, so we have
made some effort to look carefully at this.
Dean Radin and Roger Nelson made independent lists of
categories in 2004, and plotted the effect size for each of
8 or 10 categories. The two following plots show their
results, which are generally compatible.
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