We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleStatistical significance levels of nonparametric tests biased by heterogeneous variances of treatment groups.AuthorsZimmerman DWPublicationThe Journal of general psychology, 2000, Vol 127, Issue 4, p354ISSN0022-1309Publication typearticleDOI10.1080/00221300009598589