Select TWO stimuli from ITEM list used within same trial and no repeat in the rest of experiment.


Select TWO stimuli from ITEM list used within same trial and no repeat...
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Dave
Dave
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To get two item from the same pool, do

<block myblock>
/ trials = [1-2=mytrial]
</block>

<trial mytrial>
/ stimulusframes = [1=mytext1, mytext2]
/ validresponse = (57)
</trial>

<text mytext1>
/ items = myitems
/ select = list.mylist.nextindex
/ position = (40%, 50%)
</text>

<text mytext2>
/ items = myitems
/ select = list.mylist.nextindex
/ position = (60%, 50%)
</text>

<item myitems>
/ 1 = "A"
/ 2 = "B"
/ 3 = "C"
/ 4 = "D"
</item>

<list mylist>
/ poolsize = 4
/ selectionrate = always
</list>




ischneider
ischneider
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Group: Forum Members
Posts: 7, Visits: 20
Hi there - I have an item list of positive words and an item list of negative words. I want to make three types of trials, each showing two words: 
positive - negative, negative - negative, or positive - positive. The lists have 96 words. I would like to do the following: 
For pos-neg trials : noreplacenorepeat from pos list and same for neg list --> this works fine. 
For neg-neg trials : I want to pull two random words from the negative word list  to be presented but I don't want them put back. 
For pos-pos trials: the same but for positive. 

the pos-neg trials look like this (there are two types of trials, distances differ:  have the words change positions on screen on each trial, by use of counter etc) but I am not sure how to arrange for trials that pull from the same list. Separate lists make no sense, because then there is a chance that a word is paired with the same word from the second list. Not at all sure whether this is clear, but does anyone have  any ideas?


<trial close>
/ pretrialpause = 0
/ trialcode = "close"
/ stimulustimes = [500 =frame1, frame2, negatief, positief]
/ validresponse = ("f", "j")
/ ontrialbegin = [text.negatief.hposition=counter.close1.selectedvalue;
text.positief.hposition=counter.close2.selectedvalue;
shape.frame1.hposition=counter.shape1close1.selectedvalue;
shape.frame2.hposition=counter.shape2close2.selectedvalue]
</trial>

<trial far>
/ pretrialpause = 0
/ trialcode = "far"
/ stimulustimes = [500 =frame1, frame2, negatief, positief]
/ validresponse = ("f", "j")
/ ontrialbegin = [text.positief.hposition=counter.far1.selectedvalue;
text.negatief.hposition=counter.far2.selectedvalue;
shape.frame1.hposition=counter.shape1far1.selectedvalue;
shape.frame2.hposition=counter.shape2far2.selectedvalue]
</trial>




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