Millisecond Forums

Hello,

I have a small/quick query regarding list randomisation. I have 3 x 2 blocks (three conditions, each with their own two different stimuli presentation times of 500 or 900ms), 20 trials in each block. I would like to randomly present each condition to each participant, but ensuring that the participant receives both of stimuli presentations (also randomly presented) before continuing onto the next condition. I've attached my script, but I've also pasted the essentials: 

*********
Block list
*********

<list masterblocklist>
/items = [list.baseline.nextvalue; list.self.nextvalue; list.countdown.nextvalue]
/selectionmode = noreplacenorepeat(1,1,2,2,3,3)
</list>

<list baseline>
/items = (block.baseline500, block.baseline900)
</list>

<list self>
/items = (block.self500, block.self900)
</list>

<list countdown>
/items = (block.countdown500, block.countdown900)
</list>

*********
Blocks
*********

<block baseline500>
/preinstructions = (Baseline)
/trials = [1-20 = noreplace(baselineclick500)]
</block>

<block baseline900>
/preinstructions = (Baseline)
/trials = [1-20 = noreplace(baselineclick900)]
</block>

<block self500>
/preinstructions = (Self)
/trials = [1-20 = noreplace(selfclick500)]
</block>

<block self900>
/preinstructions = (Self)
/trials = [1-20 = noreplace(selfclick900)]
</block>

<block countdown500>
/preinstructions = (Countdown)
/trials = [1-20 = noreplace(countdownbegin500)]
</block>

<block countdown900>
/preinstructions = (Countdown)
/trials = [1-20 = noreplace(countdownbegin900)]
</block>

<expt>
/blocks = [1 = Intro; 2 = Consent; 3 = Instructions; 4-9 = list.masterblocklist; 10 = Wordcode; 11 = End]
</expt>


However, instead I'm getting repeats of the same block (e.g., baseline500 twice), and no presentation of either of the 'Countdown' blocks. If someone could point out where a novice is going wrong, that would be very appreciated!

Many thanks,
Josh