*    This is file GUM.SPS  
TITLE 'Two way repeated measures ANOVA of gum and mouth pH data'  
DATA LIST FILE=gum.dat LIST  
        / pH G T20 T30 S1 to S7 Time Subject  
VAR LABELS pH='mouth pH'  
           G  ='dummy variable = -1 if chewing standard gum'  
*  You have to specify the values of the levels of the grouping  
*  Factors and these must be consecutive integers.  Because we  
*  have G coded as (1,-1), we need to recode one of them to meet  
*  this requirement  
RECODE G (-1=0)  
MANOVA pH by G (0,1) Time (1,3) Subject (1,8)  
  /design = G  vs 1  
            G by Subject = 1  
            Time vs 2  
            Time by Subject = 2  
            G by Time  
            Subject  
*  You need to tell MANOVA what to use for the denominators in the  
*  F statistics, unless you want to calculate them by hand from the  
*  output  
FINISH