RE: Random Stimulus Order

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Random Stimulus Order

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mrg4	mrg4 posted 10 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 19, Visits: 218	Hey there, in our recent experiment subejcts have to learn different word-pairs and recall them later. To avoid primacy/recency effects due to the word-order, we wanted to randomize the order across subjects. In my solution I used the "noreplacenot" selection-mode. That works almost fine, but the last position always contains the same word. I have no idea why this happens. Maybe one of you has got a solution to our problem. Thank you! Cheers, Dominik Attachments noreplacenot.exp (1K views, 921 bytes) Tags noreplacenot order random select
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Dave	Dave posted 10 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	You are approaching this the wrong way. Instead of /not constraints you should use a <counter> with selection mode 'noreplace' and selection rate 'always': <text pos1> / items = items / position = (50, 10) / fontstyle = ("Arial", 2%) / select = mycounter </text> <text pos2> / items = items / position = (50, 20) / fontstyle = ("Arial", 2%) / select = mycounter </text> <text pos3> / items = items / position = (50, 30) / fontstyle = ("Arial", 2%) / select = mycounter </text> <text pos4> / items = items / position = (50, 40) / fontstyle = ("Arial", 2%) / select = mycounter </text> <text pos5> / items = items / position = (50, 50) / fontstyle = ("Arial", 2%) / select = mycounter </text> <counter mycounter> / select = noreplace(1-5) / selectionrate = always </counter> <item items> /1 = "Wort1" /2 = "Wort2" /3 = "Wort3" /4 = "Wort4" /5 = "Wort5" </item> <trial test> / stimulusframes = [1=pos1, pos2, pos3, pos4, pos4, pos5] / validresponse = (anyresponse) </trial>
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mrg4	mrg4 posted 10 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 19, Visits: 218	Thanks a lot! Now it works. :)
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