How can I restrict answer options in a matrix style question | XM Community
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I have set up a resource allocation task in a matrix table (as below). I have four different blocks of a resource (PT sessions) to be allocated to four different people. The drop down boxes simply list the four different blocks of PT sessions (9 sessions, 7 sessions, 5 sessions and 3 sessions) - Is there a way (possibly a validation?) that I can use to ensure that the same block (for example '9 sessions') cannot be allocated to more than one person?



NB. I have tried this with a 'drag and drop' task but unfortunately this doesn't present well when used on phones which most of my participants will be using?



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@Dannyboy_28 there's a great built in variable for you. When you click on custom validation you should see options for (Count). For these four sessions options you make a rule that all of the (Count) variables are equal to 1.



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Thanks bstrahin - this works perfectly

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