Select a block randomly if more than one selected

Question

Hi guys, I'm new with Sawtooth so i guess my question should be really easy for you :)

Here is my problem: I have a multiple response question with 3 possibilities (lets say ProductA, ProductB, ProductC). If the customer selects only one product, he will answer a block of questions regarding that product (that's the easy part, the one I accomplished).

But, if he select more than 1 products, lets say ProductA and ProductB, I want to randonmly choose one of this products, A or B, and he only answers to the respective block of questions.

I've been able to reach the solution for the case where he selects all the answers, because I only have to generate a random number and make a skip-logic to that number. But with two products, it can be A and B or A and C or B and C. (In my case i have a lot of products, if it were only 3 it would be simple, i guess).

I know my English is poor, sorry for that, hope you understand! :)

Cheers,

Bruno

Answer 1

Look at the help here, your approach will be a variation on the section "Showing a Random Subset of Questions/Blocks"

https://www.sawtoothsoftware.com/help/issues/ssiweb/online_help/index.html?hid_web_randomq.htm

Suppose your multiple response question MyQuestion uses the list MyList, create a new constructed list with MyList as the parent list and  these constructed list commands:

AIC(MyQuestion)
Randomize()
ListMax(1)

In your randomized block settings, use the option that allows you to set the sequence based on the constructed list you created.

Comments

Use ListValue(MyList,1) in your skips.

eg. ListValue(MyList,1)=1

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Thanks a lot Gary Baker, it works great :)

Just a small correction, I use AIC(Question) instead of AIC(MyList), and it's working great

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Paul Moon, thanks a lot. But I think I dont need to do that using the randomized blocks, thanks anyway :)

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Correct. The skips I mentioned refer to using a constructed list and no randomised blocks. Both methods work effectively.

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Good catch, I've edited my original post to correctly use AIC(Question).