ES Subcommand (ONEWAY command)

The optional ES subcommand controls the effect size estimation. It is omitted by default. When specified, at least one of the following keywords must be specified to calculate the effect sizes:

OVERALL: This optional keyword controls the calculation of the effect size for the overall test. When specified, the “ANOVA Effect Sizes” table displays in the output.
CONTRAST: This optional keyword controls the calculation of the effect size for the contrast test. When specified, the “Contrast Effect Sizes” table displays in the output. CONTRAST(POOLED) uses the pooled standard deviation for all the groups as the standardizer when estimating the effect size, (the default setting). CONTRAST({GROUP}) uses the pooled standard deviation for groups involved in the contrast as the standardizer. This keyword takes effect in the presence of at least one user-supplied contrast, and is ignored when no contrasts are specified.

Example

ONEWAY V1 BY V2
  /CONTRAST = -1 -1 1 1
  /CONTRAST = -1 0 0 1
  /CONTRAST = -1 0 .5 .5.
  /ES = CONTRAST(POOLED)