random assignment of pictures by participant


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Robert Balas
Robert Balas
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Posts: 38, Visits: 85
Hi there,

I've got an issue.
I have two sets of pictures: affective and neutral (4 pics in each class). What I have to do is to randomly assign affective to neutral pics. But, those once assigned pics must be kept constant for each participant, because I have to present each pair of pics multiple times (in random order) for each participant.

I assume that such random assignment should be done once only in the experiment (each new participant engages in a new experimental session). Am I right?

I do not have slightest idea how to do that. Can you help me out with this?

All the best,
Robert
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RBalas - 15 Years Ago
Dave - 15 Years Ago
             Dave,

Works great! Thank you.

Best,
Robert
RBalas - 15 Years Ago
Georg - 12 Years Ago
Dave - 12 Years Ago
st2pa - 11 Years Ago
                         [quote]This really isn't working[/quote]
#1: It would be helpful...
Dave - 11 Years Ago
                             I apologize for my inconsistencies-- I was trying to reformat the code...
st2pa - 11 Years Ago
                                 [quote]The error comes in these face-application pairings not...
Dave - 11 Years Ago
                                     I am sorry for not being clearer. I would like the face-application...
st2pa - 11 Years Ago
                                         You do realize that none of your <picture> elements have...
Dave - 11 Years Ago
                                             Yes, I have tried to institute some dependencies but none of them have...
st2pa - 11 Years Ago
                                                 [quote]
<picture accept_pics>
/ items = accept_pics...
Dave - 11 Years Ago
                                                     Yes, the following code gives me what I want if I define subsets:...
st2pa - 11 Years Ago
                                                         Why all those <counter> elements now? You do not need more than...
Dave - 11 Years Ago
                                                             Yep, that worked. Thanks for your help.
st2pa - 11 Years Ago
                                                                 Hello,
I have another problem with the random presentation of...
Dominique - 11 Years Ago
                                                                     [quote]Presenting this trial six times, I would expect Inquisit to...
Dave - 11 Years Ago
                                                                         Thank you very much, Dave.
I think both of them are true..
...
Dominique - 11 Years Ago
                                                                             Your block will 6 x <trial neg50_1>. If you examine those six...
Dave - 11 Years Ago
                                                                                 That's what it would be supposed to, but it does not.. :( So the...
Dominique - 11 Years Ago
                                                                                     The only reason I can think of is that your script contains a mistake....
Dave - 11 Years Ago
                                                                                         Thank you, Dave.
Dominique - 11 Years Ago

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