*** REPEATED MEASURES ANALYSIS OF VARIANCE


* Read in the data from {DSST.xls}. ;

PROC IMPORT DATAFILE = 'C:\Documents and Settings\richc\My Documents\CPH931F08\DSST.xls'
     OUT = DSST  DBMS = EXCEL REPLACE;
     SHEET = DSST;
     GETNAMES = YES;
RUN;


* Initiate a ``transcript'' in the Word file {DSST.rtf}. ;

ODS RTF FILE = 'C:\Documents and Settings\richc\My Documents\CPH931F08\DSST.rtf';


* Use SAS's PROC MIXED to perform a repeated measures analysis of
* variance.  The response variable (treated as if it were continuous)
* is the number of correct trials on the digit symbol substitution task.  
* The explanatory variable (categorical) is the experimental condition.  
* The blocking variable (categorical) is the human subject.  In this
* analysis we are confining attention to the third time period within
* the first replication. ;

PROC MIXED DATA = DSST method = type3 covtest;
CLASS SUBJECT CONDITION;
WHERE ((REPLICAT=0)&(TIME=3));
MODEL CORRECTTRIALS = CONDITION / SOLUTION noint;
RANDOM SUBJECT; 
contrast '1 versus 2' CONDITION 1 -1 0 0 ;
contrast '1 versus 3' CONDITION 1 0 -1 0 ; 
contrast '1 versus 4' CONDITION 1 0 0 -1 ;
contrast '2 versus 3' CONDITION 0 1 -1 0 ;
contrast '2 versus 4' CONDITION 0 1 0 -1 ;
contrast '3 versus 4' CONDITION 0 0 1 -1 ;
RUN;
   

* End Word transcript. ;

ODS RTF CLOSE;
RUN;