Here is my problem: I have a sample of 150 respondents. At some point in the survey, I want to randomly split the sample across 5 questions. However, I need each group to be exactly the same size, i.e. 30 respondents per group.
I got the rotating part OK, using a block and a constructed list for each of the 5 questions, as explained somewhere else on the forum. But when I test the survey by generating data, I get different group sizes, e.g. one with 35 and the next one with 25.
How can I put a quota on a question in a block? My problem is that if a respondent takes the survey, reaches those questions and is sent to one with the quota full, I don't want him/her to get terminated but rather to be sent to one of those 5 questions without quota full.
If it can help, the questions are part of a monadic price test. Maybe there is just a better way to do a monadic price test altogether?
Thanks in advance for your help.