randomizing which stimuli appear during a block


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nc
nc
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Hi,
I have 8 sets of pictures, and I want each of them to appear randomly in each of 8 blocks (no replacement). I did something like this (note: code not exact, because I am not currently able to access the script), but it doesn't seem to be working. Would you be able to advise?

<list stimuli>
/items = (picture.1, picture.2. picture.3., picture.4, picture.5, picture.6, picture.7, picture.8)
/selectionrate = block
/replace = false
</list>

<block test>
/trials = [1=trial, 2 = trial2]
/bgstim = stimulus1, stimulus2, stimulus3, list.stimuli
</block>
I know the above isn't quite right, but what I'm trying to do is include a randomly selected picture from the list as background stimuli within that block. I'm also trying to make sure that no picture appears more than once across 8 different blocks.


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