Randomly combining two sets of stimuli


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shareli@univ.haifa.ac.il
shareli@univ.haifa.ac.il
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Hi
I have two sets of stimuli, say A and B. A has six items and B has five items. I want to pair each item from list A with an Itea from List B. So that:
A. In the experiment I have all 30 possible pairs
B. Each pair appears just once
C. The order of pair appearance is random
How can I achieve that? 
Thanks much
Shlomo


Dave
Dave
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Hi
I have two sets of stimuli, say A and B. A has six items and B has five items. I want to pair each item from list A with an Itea from List B. So that:
A. In the experiment I have all 30 possible pairs
B. Each pair appears just once
C. The order of pair appearance is random
How can I achieve that? 
Thanks much
Shlomo


Pair the item numbers using two linked <list>s, use those lists for item / pair selection.

No different than https://www.millisecond.com/support/docs/current/html/howto/howtopairs.htm really.

Dave
Dave
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Posts: 12K, Visits: 100K
Dave - 5/22/2024
Hi
I have two sets of stimuli, say A and B. A has six items and B has five items. I want to pair each item from list A with an Itea from List B. So that:
A. In the experiment I have all 30 possible pairs
B. Each pair appears just once
C. The order of pair appearance is random
How can I achieve that? 
Thanks much
Shlomo


Pair the item numbers using two linked <list>s, use those lists for item / pair selection.

No different than https://www.millisecond.com/support/docs/current/html/howto/howtopairs.htm really.

<item aitems>
/ 1 = "A01"
/ 2 = "A02"
/ 3 = "A03"
/ 4 = "A04"
/ 5 = "A05"
/ 6 = "A06"
</item>

<item bitems>
/ 1 = "B01"
/ 2 = "B02"
/ 3 = "B03"
/ 4 = "B04"
/ 5 = "B05"
</item>

<list a>
/ items = (
    1,2,3,4,5,6,
    1,2,3,4,5,6,
    1,2,3,4,5,6,
    1,2,3,4,5,6,
    1,2,3,4,5,6
    )
</list>

<list b>
/ items = (
    1,1,1,1,1,1,
    2,2,2,2,2,2,
    3,3,3,3,3,3,
    4,4,4,4,4,4,
    5,5,5,5,5,5
    )
/ selectionmode = list.a.currentindex
</list>

<text astim>
/ items = aitems
/ select = list.a.nextvalue
/ position = (30%, 50%)
</text>

<text bstim>
/ items = bitems
/ select = list.b.nextvalue
/ position = (70%, 50%)
</text>

<trial abtrial>
/ stimulusframes = [1=text.astim, text.bstim]
/ validresponse = (57)
</trial>

<block abblock>
/ trials = [1-30 = trial.abtrial]
</block>

<data>
/ columns = (
    date time subject group session blocknum blockcode trialnum trialcode response latency correct
    stimulusitem stimulusitem)
</data>

GO

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