FergusonBrannick2012    Effect sizes and standard errors from Ferguson
                        and Brannick (2012).
GenderDiff01            Gender Differences Data (1).
GenderDiff02            Gender Differences Data (2).
GenderDiff03            Gender Differences Data (3).
McLeod2007              Effect sizes from McLeod, Weisz, and Wood
                        (2007).
Sweeney2015             Effect sizes from Sweeney and Moyer (2015).
crosshairs              Creates a Cross-hairs Plot.
metaplotr-package       Creates Cross-hairs Plot.
