Hi Dave,

I was wondering if there is way to randomize the blocks themselves. In our experiment, we have two questionnaires and we want our participants to see those questionnaires in a random order. However, the two should always follow each other. Do you think it's possible to create such a pattern?

Thanks!

Gizem

Of course blocks can be randomized (a <survey> is a <block>. See the documentation for the <expt> element's /blocks attribute.

Thanks for the quick reply. I know that blocks can be randomized but the main questions is if they can be randomized while making sure that the one that's not shown will be shown right after the first one. So let's say I have Block 1 and Block 2. Would something like this work:

/ blocks = [1=noreplace(block1, block2); 2=noreplace(block1, block2)]

I don't want the program to show the exact same block one after the other. 

Of course, you just need to sample from the same pool on both occasions instead of setting up two distinct pools:

<survey a>
[...]
</survey>

<survey b>
[...]
</survey>

<expt>
/ blocks = [1-2=noreplace(a,b)]
[...]
</expt>

Regards,

~Dave

Great! Thanks!