splitting stimulus list randomly into two fixed groups

Author	Message
juliane_d	juliane_d posted 11 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 12, Visits: 39	Hi there, I thought this was easy, but i cannot figure it out. I have a list of stimuli that i want to randomly assign to two groups anew for each participant to be used in various tasks throughout the experiment. I have tried using counter and list elements with the /not attribute for the second group, but cannot get it to run. Any idea what I am doing wrong? Many thanks, Juliane ************************************** <counter setup_pix1> / items = ("pix1", "pix2","pix3","pix4","pix5","pix6") / select = noreplace / selectionrate = trial </counter> <counter setup_pix2> / items = ("pix1", "pix2","pix3","pix4","pix5","pix6") / select = noreplace / selectionrate = trial / not = (setup_pix1) </counter> <item pix1items> </item> <item pix2items> </item> <text Pix1> / items = pix1items / size = (30%, 30%) / position = (50,50) / select = noreplace </text> <text Pix2> / items = pix2items / size = (30%, 30%) / position = (50,50) / select = noreplace </text> <trial setup_pairings> / ontrialbegin = [item.pix1items.item=counter.setup_pix1.selectedvalue] / ontrialbegin = [item.pix2items.item=counter.setup_pix2.selectedvalue] / trialduration = 0 </trial>
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juliane_d - 11 Years Ago

<block myblock> / trials = [1=setup_pix; 2=summary]...

Dave - 11 Years Ago

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