OBrienKaiser               package:car               R Documentation

_O'_B_r_i_e_n _a_n_d _K_a_i_s_e_r'_s _R_e_p_e_a_t_e_d-_M_e_a_s_u_r_e_s _D_a_t_a

_D_e_s_c_r_i_p_t_i_o_n:

     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
     'contr.sum'.

_U_s_a_g_e:

     OBrienKaiser

_F_o_r_m_a_t:

     A data frame with 16 observations on the following 17 variables.

     '_t_r_e_a_t_m_e_n_t' a factor with levels 'control' 'A' 'B'

     '_g_e_n_d_e_r' a factor with levels 'F' 'M'

     '_p_r_e._1' pretest, hour 1

     '_p_r_e._2' pretest, hour 2

     '_p_r_e._3' pretest, hour 3

     '_p_r_e._4' pretest, hour 4

     '_p_r_e._5' pretest, hour 5

     '_p_o_s_t._1' posttest, hour 1

     '_p_o_s_t._2' posttest, hour 2

     '_p_o_s_t._3' posttest, hour 3

     '_p_o_s_t._4' posttest, hour 4

     '_p_o_s_t._5' posttest, hour 5

     '_f_u_p._1' follow-up, hour 1

     '_f_u_p._2' follow-up, hour 2

     '_f_u_p._3' follow-up, hour 3

     '_f_u_p._4' follow-up, hour 4

     '_f_u_p._5' follow-up, hour 5

_S_o_u_r_c_e:

     O'Brien, R. G., and Kaiser, M. K. (1985) MANOVA method for
     analyzing repeated measures designs: An extensive primer.
     _Psychological Bulletin_ *97*, 316-333.

_E_x_a_m_p_l_e_s:

     OBrienKaiser
     contrasts(OBrienKaiser$treatment)
     contrasts(OBrienKaiser$gender)

