William B. Ware <[EMAIL PROTECTED]> wrote:
: sequential/hierarchical regression as you note below... however, ANCOVA
: has at least two assumptions that your situation does not meet. First, it
: assumes that assignment to treatment condition is random. Second, it
: assumes that the measurement on the covariate is independent of
: treatment. That is, the covariate should be measured before the treatment
: is implemented. Thus, I believe that you should implement the
: hierarchical regression... but I'm not certain what question you are
They aren't assumptions but they do affect interpretations. either way is
ANCOVA which will answer a question. Write the model comparison and
you'll see that.
Whether it's the question you want to answer is another
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