O'Brien and Kaiser's Repeated-Measures Data
These contrived repeate-measures data are taken from Table 7 of
O'Brien and Kaiser (1985). The data are from an imaginary study in which
16 female and male subjects, who are divided into three treatments, are measured
at a pretest, postest, and a follow-up session; during each session, they are
measured at five occasions at intervals of one hour. The design, therefore, has
two between-subject and two within-subject factors.
The contrasts for the
treatment factor are set to $-2, 1, 1$ and
$0, -1, 1$. The contrasts for the
gender factor are set to
O'Brien, R. G., and Kaiser, M. K. (1985) MANOVA method for analyzing repeated measures designs: An extensive primer. Psychological Bulletin 97, 316--333.
OBrienKaiser contrasts(OBrienKaiser$treatment) contrasts(OBrienKaiser$gender)