By SpoHo - 12/18/2013
Hi!
In my experiment i have to present pairs of words randomly, while changing the position (left / right) randomly as well. Like: good / bad, old / young, etc.
For that purpose, i created 4 labels: PosLeft, PosRight, NegLeft, NegRight
How can I select the pairs randomly without repeating one pair ? I tried select = noreplacenorepeat, but it doesn't work properly. I think it's because for Inquisit good / bad is a differnent pair to bad / good.
Do you guys have any idea how to achieve that?
You can have a look at my code below.
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By Dave - 12/18/2013
#1: There is no such thing as selection in /bgstim attributes. I.e
<block blcktest1>
/ bgstim = noreplacenorepeat(txtPosLinks,txtNegRechts)
/ trials = [1-5 = countdown; 6-8 = random(trlLogo)]
</block>
makes no sense and I'm not at all sure what you intended that to mean / achieve.
#2: What exaclty do you 'noreplacenorepeat' expect to do here?
<text txtPosLinks>
/ items = ("sportlich", "modern","qualitativ", "dynamisch", "etabliert", "vertrauenswürdig", "alt", "cool", "bekannt", "fortschrittlich")
/ select = noreplacenorepeat
[...]
Clearly, all 10 items are *different*, so what could possibly repeat?
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By Dave - 12/18/2013
Oh, and since you (presumably) want to keep selection pools intact *across blocks*, you *must* specify proper /resetinterval attributes for the applicable <text> elements.
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By SpoHo - 12/18/2013
hey dave!
ok thanks for clearing that up. I adjusted my code.
Could you give me a hint on how to work with /resetinterval across blocks properly?
My intention was to have 10 pairs of words, each being presented in a random order and in random positions (left / right, e.g. good / bad vs. bad / good).
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By Dave - 12/18/2013
Consider
<expt>
/ blocks = [1=firstblock; 2=secondblock]
</expt>
<block firstblock>
/ bgstim = (leftlabel, rightlabel)
/ trials = [1=mytrial]
</block>
<block secondblock>
/ bgstim = (leftlabel, rightlabel)
/ trials = [1=mytrial]
</block>
<text leftlabel>
/ items = ("A", "B")
/ select = noreplace
/ resetinterval = 0
/ position = (25%, 10%)
</text>
<text rightlabel>
/ items = ("B", "A")
/ select = text.leftlabel.currentindex
/ position = (75%, 10%)
</text>
<trial mytrial>
/ validresponse = (57)
</trial>
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By SpoHo - 12/18/2013
I tried to understand it, but i don't get your point at:
<block firstblock>
/ bgstim = (leftlabel, rightlabel)
/ trials = [1=mytrial]
</block>
<block secondblock>
/ bgstim = (leftlabel, rightlabel)
/ trials = [1=mytrial]
</block>
I tried to add /resetinterval = 0 to my experiment, but I think I used it wrong.
While testing, I had one block "cool / uncool" followed directly by "uncool / cool".
Again, my updated experiment is attached.
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By Dave - 12/18/2013
First pair:
<text txtNegRechts>
/ items = ("unsportlich", "konservativ", "billig", "langsam", "neuartig", "unzuverlässig", "jung", "uncool", "unbekannt", "rückständig")
/ select = text.txtPosLinks.currentindex
depends on
<text txtPosLinks> / items = ("sportlich", "modern","qualitativ", "dynamisch", "etabliert", "vertrauenswürdig", "alt", "cool", "bekannt", "fortschrittlich") / select = noreplace
--- Second pair:
<text txtPosRechts> / items = ("sportlich", "modern","qualitativ", "dynamisch", "etabliert", "vertrauenswürdig", "alt", "cool", "bekannt", "fortschrittlich") / select = text.txtneglinks.currentindex
depends on
<text txtNegLinks> / items = ("unsportlich", "konservativ", "billig", "langsam", "neuartig", "unzuverlässig", "jung", "uncool", "unbekannt", "rückständig") / select = noreplace
---
They are completely independent. Whatever is selected in the first pair has no effect whatsoever on the selection on the second pair. |
By SpoHo - 12/18/2013
right, thats my problem :)
Would it be possible to have a global variable which contains the chosen items so far? So it could be used as a global filter?
Another approach I thought about would be to have to items (txtPositive, txtNegative) and to change the position randomly - would that make any sense?
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By Dave - 12/18/2013
SpoHo (12/19/2013)
Another approach I thought about would be to have to items (txtPositive, txtNegative) and to change the position randomly - would that make any sense?
Yes, IMO, that's the best way to go a about it. In other words:
<expt>
/ blocks = [1=firstblock; 2=secondblock]
</expt>
<block firstblock>
/ onblockbegin = [text.positivelabel.hposition=25%; text.negativelabel.hposition=75%]
/ bgstim = (positivelabel, negativelabel)
/ trials = [1=mytrial]
</block>
<block secondblock>
/ onblockbegin = [text.positivelabel.hposition=75%; text.negativelabel.hposition=25%]
/ bgstim = (positivelabel, negativelabel)
/ trials = [1=mytrial]
</block>
<text positivelabel>
/ items = ("P1", "P2")
/ select = noreplace
/ resetinterval = 0
/ position = (25%, 10%)
</text>
<text negativelabel>
/ items = ("N1", "N2")
/ select = text.positivelabel.currentindex
/ position = (75%, 10%)
</text>
<trial mytrial>
/ validresponse = (57)
</trial>
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