Participants were randomly allocated to one of two stress management therapy groups, or a waiting list control group. Their baseline levels of stress were measured before treatment, and again after 3 months of weekly therapy sessions. The researcher decided to run an ANCOVA on her data. What was the covariate?
A)This is not an appropriate design for ANCOVA.
B)Treatment group
C)Baseline stress levels
D)Time

Question

Quizplus · Accepted Answer

The covariate in this case is the baseline stress levels, as this is a measure that is related to both the treatment groups and the outcome of stress reduction. ANCOVA is appropriate for this design if there is a significant correlation between the covariate and the outcome variable. The treatment group and time are not covariates in this analysis.

Participants Were Randomly Allocated to One of Two Stress Management