How to randomise participants to either the control group or the experimental group questions, but they also need to be stratified according to group. I.e. Qualtrics needs to access a common data base, and participants of a specific type (e.g. female, no association to an FGM practising country - determined by whether they say one of their parents was born from a practising country as per drop down list) then access a particular record in the data base based on the order in which they log on. To illustrate, e.g. females with no association to a practising country. Let's number them based on when they log on, e.g. 1, 2, 3, . . . For 1 and 2, flip a coin to see which list 1 gets. Force 2 to the get the opposite list. For 3 and 4, flip a coin to see which list 3 gets. Force 4 to get the opposite list. Etc. Do the same for the other three categories of participant. ANY help would be much appreciated! Thank you.

> @Fatou said:> Thanks everyone. Its based on the responses of earlier participants, which cannot be stored on Qualtrics (and Java is also front end logic). I've sat down with some people and the only possible option seems to be to use the 'add web service' function on survey flow. Which would mean building the program and that seems perhaps too much for our capability :(Although a webservice would be ideal, I would think including a edv in their link with the number they were assigned to in the previous survey, and using a randomizer (evenly presented) and then branching based on the edv could work ... in theory.

hello @Fatou ,Hope below link will help you:https://www.qualtrics.com/support/survey-platform/survey-module/survey-flow/standard-elements/randomizer/#UsingTheRandomizerWithOtherElements

How to randomise and stratify participants?

How to randomise and stratify participants? | Experience Community

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