My independent and dependent variable is continuous, while the covariate is categorical. I heard that ANOVA is a more practical mean than hierarchical regression in this case. Apparently in ANCOVA, the covariate should be continuous while the fixed variable is categorical. Should I just insert the continuous independent variable as the covariate, or is there any other suggestion? How do we interpret the ANCOVA results if the covariate & fixed variable is 'reversed'? Thank you in advance.
Sure you can. This a common misconception. See the ancova material in Montgomery Design and Analysis of Experiments in the z-library for some examples. Best wishes, David Booth
If both your IV nd DV are linear, then regression is the most frequently used method, and you can introduce your categorical control as a set of dummy variables.
Yes, you can. ANCOVA blends ANOVA and regression. It is employed to study combinations of continuous and categorical variables of interest. You could go through the following for further details.
Baguley, T. (2012). Serious stats: A guide to advanced statistics for the behavioral sciences. Palgrave Macmillan. https://www.macmillanihe.com/page/detail/Serious-Stat/?K=9780230577183
Howell, D. C. (2013). Statistical methods for psychology (8th ed.). Cengage Learning. https://www.cengage.com/c/statistical-methods-for-psychology-8e-howell/9780357670996PF/
Glen, S. (2015, May 5). ANCOVA: Analysis of covariance. Statistics How To. https://www.statisticshowto.com/ancova/
Grace-Martin, K. (2019, January 14). The general linear model, analysis of covariance, and how ANOVA and linear regression really are the same model wearing different clothes. The Analysis Factor. https://www.theanalysisfactor.com/general-linear-model-anova-regression-same-model/
Good luck,
Andina Mega Larasati FYI ANCOVA and regression with dummy variables are algebraically identical, so use whichever one is more familiar
