Hello All,

I am having some difficulty interpreting the differences between the following contrasts:

1) AllSub, behav1

[0 1]

2) behav1

[1]

3) AllSub, behav1, behav2

[0 1 0; 0 0 1]

4) Patients, Controls, behav1

[1 -1 0]

How would (1) be different from (2)? Particularly why would AllSub need to be selected to do a regression of behav1?

If (4) is a one-way Ancova controlling for behav1 would (3) essentially be regressions controlling for the other two variables?

From,

Humza Ahmed