repeated measures custom contrasts for linear trends

Posted by Paul Mcgeoghan on Feb 05, 2007; 11:01am
URL: http://spssx-discussion.165.s1.nabble.com/repeated-measures-custom-contrasts-for-linear-trends-tp1073671.html

Hi,

I have a customer with a within-subject factor (MOVES) with 10 levels and a between subject factor
with 3 levels (IAC).

He wants to test if there is a linear trend at each of the 3 between subject factor levels.

What would be the syntax for this?

I currently have the syntax below:

GLM
  moves1 moves2 moves3 moves4 moves5 moves6 moves7 moves8 moves9 moves10 BY iac
  /WSFACTOR = trial 10 Polynomial
  /METHOD = SSTYPE(3)
  /EMMEANS = TABLES(iac) COMPARE ADJ(BONFERRONI)
  /EMMEANS = TABLES(trial) COMPARE ADJ(BONFERRONI)
 /EMMEANS = TABLES(iac*trial) COMPARE(iac) ADJ(bonferroni)
 /EMMEANS = TABLES(iac*trial) COMPARE(trial) ADJ(bonferroni)
  /PRINT = DESCRIPTIVE
  /CRITERIA = ALPHA(.05)
  /WSDESIGN = trial
  /DESIGN = iac .

Thanks,
Paul


==================
Paul McGeoghan,
Application support specialist (Statistics and Databases),
University Infrastructure Group (UIG),
Information Services,
Cardiff University.
Tel. 02920 (875035).