In my study, I have a within-subject independent variable (the DV was measured twice for each participant), and I am also interested in examining the effect of participants’ demographic characteristics (between-subject) on the dependent variable. Therefore, I am running a mixed model ANOVA using SPSS.
Here are my questions:
Thank you in advance for your advice.
Hello,
Differences in SPSS outputs can arise from interactions between demographics or missing data. Analyse each demographic individually for isolated effects and together for a comprehensive view. Include continuous variables like age as covariates in mixed model ANOVA.
Hope this helps.
Hsin-Yuan Chen Thank you for your advice. It is very helpful. Just one more question: may I know if I treat the continuous variable (e.g., age) as a covariate, can I interpret and report the results as a main effect like an IV? Because in academic papers, I usually see them saying "when we control for..." instead.
Pcl Lee
Hello,
Yes, you can interpret and report the results of a continuous covariate (e.g., age) as a main effect, similar to an independent variable. Phrases like 'when controlling for...' indicate that the effects of covariates have been accounted for in the analysis.
Hope this helps.
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