WSDESIGN Subcommand (GLM: Repeated Measures command)

WSDESIGN specifies the design for within-subjects factors. Its specifications are like those of the DESIGN subcommand, but it uses the within-subjects factors rather than the between-subjects factors.

  • The default WSDESIGN is a full factorial design, which includes all main effects and all interactions for within-subjects factors. The default is in effect whenever a design is processed without a preceding WSDESIGN or when the preceding WSDESIGN subcommand has no specifications.
  • A WSDESIGN specification cannot include between-subjects factors or terms based on them, nor does it accept interval-level variables.
  • The keyword INTERCEPT is not allowed on WSDESIGN.
  • 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.