Dear RG,

I have done a study with a chair that has a floating (sort of like a rocking chair but more advanced) and a fixed setting and I tested various variables such as time perception (estimate time they sat on the chair in both conditions) , relaxation, muscle tension, stress etc pre sitting and post sitting for both conditions. I also took anxiety, depression scores and sleepiness scores (pre and post sleepiness) in both conditions.

I tested all participants in both conditions (float and fixed setting), with 1 week pause between each condition and participants were assigned to the conditions in a counterbalanced order.

Now there appears to be an effect of post session sleepiness on session time perception but only for the float condition.

The issue is that I have two covariate variables for post session sleepiness (one for fixed condition and other for float condition. i.e POST_FIXED_SLEEPINESS and POST_FLOAT_SLEEPINESS) and two DVs (FLOAT_TIME_PERCEPTION & FIXED_TIME_PERCEPTION).

Is it methodologically correct to put both of them in the repeated measures covariate box or is there a way to implement each covariate only to the condition that it belongs to (and if there is how do I do that)?

Thank you for your help in the matter.