Hello all,
I have a question regarding ANCOVA, which seems straightforward, however an answer has eluded me. The question is:
Can a dichotomous variable be used as a covariate in ANCOVA?
I've consulted several textbooks (Stevens, Tabachnick, Munro, Norman), some of which indicate that the covariate must be continuous level, while others are ambiguous on the subject.
To add to the confusion, I have seen several studies using ANCOVA to control for the effects of gender.
Any help on this would be appreciated. If possible, I would love to have a good citation clarifying this issue.
Thank you in advance.
I have a question regarding ANCOVA, which seems straightforward, however an answer has eluded me. The question is:
Can a dichotomous variable be used as a covariate in ANCOVA?
I've consulted several textbooks (Stevens, Tabachnick, Munro, Norman), some of which indicate that the covariate must be continuous level, while others are ambiguous on the subject.
To add to the confusion, I have seen several studies using ANCOVA to control for the effects of gender.
Any help on this would be appreciated. If possible, I would love to have a good citation clarifying this issue.
Thank you in advance.