I am trying to measure the similarity between pairs of pairs of products. In total I have 7 products (A, B, C, D , E, F, and G). This means that there are 7*6/2=21 pairs of products. Thus in total there are 21*20/2=210 possible pairs of pairs of products.

I want respondents to answer the following question: Which pair of products are more similar to one another? (select one)

I am going to analyze the similarity data with mutidimensional scaling, and I want data on the full design.

Since I don't want to burden respondents with 210 questions I would like them to answer a subset of the 210 questions (say 15). Is there any way to show respondents a subset of questions? And how does one randomize these? I want to show 1 question per page.

I'm using version 8.0.0. If you require additional info just ask.

Thanks in advance,

Sander