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How to structure data from a binary forced stated choice experiment that was repeated 7 times per person?

Posted: 11 Feb 2021, 10:50
by Istillhavequestions
Hello

I just downloaded Apollo into R and I have two questions regarding my data.

Currently my file looks like this

personalID - task number (1-7) - side summer (1 or 2) - attributeA - attributeB - attributeC - priceAttribute - choice (1 or 0) - some personal info variables.

This is long instead of wide format if I am correct.

But the example data "apollo_modeChoiceData.csv" has the same format (multiple rows per person. This is why I wanted to know if I need to change something?

I also have a second question: My design is a completely randomised design. But within one attribute some levels appear more often than others as they are more important. Is there a way I can/should include this in my models?

Thanks in advance!

Re: How to structure data from a binary forced stated choice experiment that was repeated 7 times per person?

Posted: 11 Feb 2021, 18:39
by stephanehess
Hi

this is the wide (not long) format, which is correct for Apollo.

Regarding your attribute levels, no, you should not control for this in the model

Stephane

Re: How to structure data from a binary forced stated choice experiment that was repeated 7 times per person?

Posted: 11 Feb 2021, 19:24
by Istillhavequestions
Dear Stephane,

thanks a lot!

I will try it that way!