*
chapter_14_table_1

For the hypothetical data contained in Table 14.1, a perceptual 
psychologist studying the visual system was interested in determining 
the extent to which interfering visual stimuli slow the ability to 
recognize letters. Participants are brought into a laboratory where 
they are seated in front of a tachistoscope. Variations in the 
presentations of letters is examined with interest being on the 
reaction time for target letters presented either in the center of 
the screen or off centered with and without "noise" accompanying the 
target letters. 

To perform the repeated measures analysis, PROC GLM is used. The 
analysis begins by specifying the four dependent variables on the 
left side of the equals sign. Note that angle is 'changing faster' 
than 'noise.' Specifically the first two dependent variables entered
are both noise absent, with the first being angle=0 and the second
being angle=8. In this sense we say that angle is 'changing
fastest.' Because angle is 'changing fastest,' it is included 
second on the REPEATED LINE (implying that because noise is 
'changing slowest,' it is included first on the REPEATED line).
As usual we have included / NOUNI on the model line. This tells
SAS that we do not want it to perform univariate tests for
each of the four dependent variables.
;

LIBNAME md 'd:\data files by type\sas data files\tables';
     Data c14t1;
       SET md.chapter_14_table_1;
PROC GLM;
MODEL abs0 abs8 pres0 pres8 = / NOUNI;
REPEATED noise 2, angle 2;
RUN;