Timeline for When should one use multiple regression with dummy coding vs. ANCOVA?
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Feb 5 at 8:16 | answer | added | ANuo | timeline score: 0 | |
| Nov 15, 2021 at 17:16 | answer | added | Jacob Mack | timeline score: -1 | |
| Sep 9, 2017 at 3:04 | history | edited | ttnphns |
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| Nov 23, 2013 at 17:03 | comment | added | klaus se |
This is a question about John's answer (as I do not have enough reputation points to write a real comment). The sources I read so far (e.g. if I google for ANOVA ANCOVA or Multiple regression ANCOVA) tell me that ANOVA involves only categorical predictors and ANCOVA involves categorical and continuous predictors, and that both, ANOVA and ANCOVA designs, can be described using a multiple regression model. Does this conflict with John's answer, which sais "ANCOVA and ANOVA are the same, as ttnphns pointed out"?
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| Jun 26, 2012 at 21:15 | answer | added | Answer | timeline score: -6 | |
| Aug 16, 2011 at 2:33 | vote | accept | DQdlM | ||
| Aug 14, 2011 at 22:41 | answer | added | John | timeline score: 17 | |
| Aug 14, 2011 at 20:38 | history | tweeted | twitter.com/#!/StackStats/status/102841542322032641 | ||
| Aug 14, 2011 at 18:25 | comment | added | DQdlM | @John thanks for your comments. I may not be using the terms correctly. I have an experiment where 2 categorical factors (light/no-light and ambient/elevated CO_2) and one continuous variable ([DOC]) were manipulated. To evaluate the effect of these factors on the response, I used ANCOVA, since there was a mix of categorical and continuous factors. However multiple regression with dummy variable coding can also be used to test the effect of a mixture of cont. and cat. factors on a response. I am hoping to learn more about when it is appropriate to select one or the other. | |
| Aug 14, 2011 at 18:10 | answer | added | ttnphns | timeline score: 17 | |
| Aug 14, 2011 at 18:05 | comment | added | John | That really changes everything in your question. So you don't really want to select between ANCOVA and regression but ANOVA and regression. | |
| Aug 14, 2011 at 17:50 | comment | added | DQdlM | @John, in the experiment that I mention all of the variables were predictors and were manipulated but I left the description vague because I am hoping for a general answer of what I should consider when choosing between the two types of analysis. | |
| Aug 14, 2011 at 17:35 | comment | added | John | Which of your variables is a predictor and which a correlate? | |
| Aug 14, 2011 at 16:55 | history | asked | DQdlM | CC BY-SA 3.0 |