I have a set of 5 alternatives, but to reduce complexity and to make it work on a smartphone, I only want 3 out of those 5 to be shown (the ones, that should be shown changes between choice sets e.g. 1,2,5; 1,3,4 etc.)
I have done the experiment design in ngene and have prepared for this: in every choice set, I have 2 alternatives with price “9999” also indicating there irrelevance.
What’s missing, is a way, to hide those two (changing) collumns - based on there value.
Is there a way to do this? (the easier and robuster, the better)
What is required is an availability design, then use that to drive display.
The method above is a bit of a hack, and would work but would be very brittle.
So here´s the workflow.
Generate an experiment that contains an ávailability attribute. Use consistent labels like ´shown´, ´hidden´etc
Then you´ll need to generate the design - there are papers on this, but essentially you will need to control for balance and ensure you remove co-linearity which may be introduced by removing certain alternatives. Upload once happy with it.>
Then you´ll need some javascript to hide an alternative column if the cell has ´hidden´in it - this, probably also to hide the ávailability´´ attribute. This is pretty simple to do using chat gpt.