Pseudorandomization at the Block level

Author	Message
Kolfers	Kolfers posted 10 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 24, Visits: 137	Ah..that makes sense! Thank you for the quick response, and on Sunday at that!
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Dave	Dave posted 10 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 103K	You need to use a <list> element for trial-selection with its /maxrunsize set according to your needs: <list triallist> / items = (trial.a, trial.b, trial.c, trial.d) / poolsize = 16 / maxrunsize = 2 </list> <block myblock> / trials = [1-16 = list.triallist] ... </block>
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Kolfers	Kolfers posted 10 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 24, Visits: 137	Hi, I have a very short question, I'm sure it must be in the helpfile or forum somewhere, but I'm having trouble finding it. So in a block I want to present trials in a pseudorandom order. I know that the code below will prevent repeated trials (as far as possible). <block 1> / trials = [1-8= noreplacenorepeat(stim1,stim2,stim3,stim4)] </block> However, if I would want to prevent only double (and upwards) repetition of the same trial: e.g. allow trials to be repeated once. Would the following code be correct? <block 1> / trials = [1-16= noreplacenorepeat(stim1,stim1,stim2,stim2,stim3,stim3,stim4,stim4)] </block> Thanks! Tags noreplacenorepeat pseudorandom
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