topic Dunnett’s tests in repeated measures in Discussions

Dunnett’s tests in repeated measures

jaykim — Wed, 02 Nov 2011 00:39:45 GMT

Hi,

I have data collected from a repeated meaures study. Each subject's physiological data were measured eight times and 18 subjects participated in the study. The first measurement will be used as a reference value and compared with other 7 measures. So, I would like to use Dunnett's test instead of using Tukey HSD. Is there any simple way to do it?

Thanks,

Jay

Dunnett’s tests in repeated measures

ms — Wed, 02 Nov 2011 09:03:30 GMT

You can use the Fit Y by X platform. Set measured variable as Y, sampling (1-8, Nominal or Ordinal) as X and Subject as Block. Then under the red triangle pick "Campare Means --> With Control, Dunnett's". You will be asked to specify which level that is treated as control.

Script example:

dt = Open( "$ENGLISH_SAMPLE_DATA/Blood Pressure.jmp" );

dt << Oneway(

Y( :BP 8M ),

X( :Dose ),

Block( :Subject ),

With Control( 1, {"Control"} ),

Comparison Circles( 1 )

);

Dunnett’s tests in repeated measures

jaykim — Wed, 02 Nov 2011 16:13:52 GMT

Thanks a lot!!