Millisecond Forums

Hi again! 

I am having trouble with my n-back task code again. It is nearly complete but I am attempting to randomise the presentation of my survey pages which is proving difficult.
The way I have attempted to do this is I have created a <survey thoughtprobes> function which presents each of the survey pages in a random order. However, I need this survey page to be shown after every one of my experimental blocks. To do this I need to be able to randomly select groups of block1 + survey.thoughtprobes, block 2 + survey.thoughprobes, block3 + survey.thoughtprobes, etc in my <experiment> function. Is there an easy way to do this?

So far I have attempted to use a method I found on a 10 year old thread in this forum which uses lists to achieve this like so:
<list blockselector>
/items = (list.q0b1, list.q0b2, list.q0b3, list.m0b1, list.m0b2, list.m0b3, list.l0b1, list.l0b2, list.l0b3,
list.q1b1, list.q1b2, list.q1b3, list.m1b1, list.m1b2, list.m1b3, list.l1b1, list.l1b2, list.l1b3,)
/selectionmode = random
/replace = false
</list>
<list q0b1>
/items = (block.quick0back1, survey.thoughtprobe)
/selectionmode = sequence
</list>
*** multiple lists for each block type ***
<expt>
/ preinstructions = (intro)
/ postinstructions = (end)
/ blocks = [1-2 = list.blockselector; 3-4 = list.blockselector; 5-6 = list.blockselector; 7-8 = list.blockselector; 9-10 = list.blockselector;
11-12 = list.blockselector; 13-14 = list.blockselector; 15-16 = list.blockselector; 17-18 = list.blockselector; 19-20 = list.blockselector;
21-22 = list.blockselector; 23-24 = list.blockselector; 25-26 = list.blockselector; 27-28 = list.blockselector; 29-30 = list.blockselector;
31-32 = list.blockselector; 33-34 = list.blockselector; 35-36 = list.blockselector]
/onexptend = [values.completed = 1]
</expt>

However this does not work. Any ideas on how I can randomly present blocks with the survey at the end?
I have included my code and stimuli below if you would like to look at the whole thing.
Thank you!