SPSS® 12.0 Command Syntax Reference

684 GLM: Repeated Measures
• Nested effects are not allowed. Therefore, the symbols ( ) are not allowed here.
• If more than one WSDESIGN subcommand is specified, only the last one is in effect.
Example
GLM JANLO,JANHI,FEBLO,FEBHI,MARLO,MARHI BY SEX
/WSFACTOR MONTH 3 STIMULUS 2
/WSDESIGN MONTH, STIMULUS
/DESIGN SEX.
• There are six dependent variables, corresponding to three months and two different levels
of stimulus.
• The dependent variables are named on the GLM variable list in an order such that the
level of stimulus varies more rapidly than the month. Thus, STIMULUS is named last on
the WSFACTOR subcommand.
• The WSDESIGN subcommand specifies only the main effects for within-subjects factors.
There is no MONTH by STIMULUS interaction term.
MEASURE Subcommand
In a doubly multivariate analysis, the dependent variables represent multiple variables measured
under the different levels of the within-subjects factors. Use MEASURE to assign names
to the variables that you have measured for the different levels of within-subjects factors.
• Specify a list of one or more variable names to be used in labeling the averaged results.
If no within-subjects factor has more than two levels, MEASURE has no effect. You can
use up to 255 characters for each name.
• The number of dependent variables in the dependent variables list should equal the
product of the number of cells in the within-subjects design and the number of names on
MEASURE.
• If you do not enter a MEASURE subcommand and there are more dependent variables than
cells in the within-subjects design, GLM assigns names (normally MEASURE_1,
MEASURE_2, etc.) to the different measures.
• All of the dependent variables corresponding to each measure should be listed together
and ordered so that the within-subjects factor named last on the WSFACTORS subcommand
varies most rapidly.
Example
GLM TEMP11 TEMP12 TEMP21 TEMP22 TEMP31 TEMP32,
WEIGHT11 WEIGHT12 WEIGHT21 WEIGHT22 WEIGHT31 WEIGHT32 BY GROUP
/WSFACTOR=DAY 3 AMPM 2
/MEASURE=TEMP WEIGHT
/WSDESIGN=DAY, AMPM, DAY BY AMPM
/DESIGN.
• There are 12 dependent variables: 6 temperatures and 6 weights, corresponding to
morning and afternoon measurements on three days.
• WSFACTOR identifies the two factors (DAY and AMPM) that distinguish the temperature
and weight measurements for each subject. These factors define six within-subjects cells.
• MEASURE indicates that the first group of six dependent variables correspond to TEMP
and the second group of six dependent variables correspond to WEIGHT.