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Nick00004
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Group: Forum Members
Posts: 12,
Visits: 52
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Hello,
I tweaked the Simon task from the Inquisit library to increase the number of test blocks (from 1 to 3) and the number of trials w/ in each block (from 28 to 60). As in the original, 50% of trials are congruent and 50% incongruent. Here, incongruent means either a blue box appears on the right side of the screen or a red box appears on the left side of the screen. What's odd is that when I run the task, all the trials appear as incongruent, with no congruent ones, but the raw data files say that it's tracking both types of trials, 50/50. Comparing the two scripts - the original and mine - I can't seem to find the line of code which may be causing the error. I've included the line of code that I adapted where the lists and trials are specified.
Thanks!
################ test block - 30 congruent trials ##################
<list congruentstimtype>
/ items = (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>
<list congruenthpos>
/ items = (85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%)
/ selectionmode = list.congruentstimtype.currentindex
</list>
<list congruentcresp>
/ items = (42,42,42,42,42,42,42,42,42,42,42,42,42,42,42,54,54,54,54,54,54,54,54,54,54,54,54,54,54,54)
/ selectionmode = list.congruentstimtype.currentindex
</list>
################ test block - 30 incongruent trials ##################
<list incongruentstimtype>
/ items = (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>
<list incongruenthpos>
/ items = (85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%)
/ selectionmode = list.incongruentstimtype.currentindex
</list>
<list incongruentcresp>
/ items = (42,42,42,42,42,42,42,42,42,42,42,42,42,42,42,54,54,54,54,54,54,54,54,54,54,54,54,54,54,54)
/ selectionmode = list.incongruentstimtype.currentindex
</list>
#########################congruent stim trial ########################
<trial congruenttrial>
/ ontrialbegin = [if(script.currentblock=="practiceblock")
{
values.stimtype=list.pcongruentstimtype.nextvalue;
values.stimhpos=list.pcongruenthpos.nextvalue;
values.cresp=list.pcongruentcresp.nextvalue;
}
else
{
values.stimtype=list.congruentstimtype.nextvalue;
values.stimhpos=list.congruenthpos.nextvalue;
values.cresp=list.congruentcresp.nextvalue;
}]
/ posttrialpause = 500
/ stimulustimes = [0=fixation; 800=blank; 1050=stimulus,debug]
/ validresponse = (42,54)
/ iscorrectresponse = [trial.congruenttrial.response==values.cresp]
/ response = timeout(1000)
</trial>
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Dave
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Group: Administrators
Posts: 13K,
Visits: 104K
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Where / how exactly are you distinguishing between congruent and incongruent stimuli?
<list congruentstimtype>
/ items = (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>
...
<list incongruentstimtype>
/ items = (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>
appear to refer to the exact same stimuli, no difference.
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Dave
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Group: Administrators
Posts: 13K,
Visits: 104K
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To be more precise: Look at all your <lists>
<list congruentstimtype>
/ items = (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>
<list congruenthpos>
/ items = (85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%)
/ selectionmode = list.congruentstimtype.currentindex
</list>
<list congruentcresp>
/ items = (42,42,42,42,42,42,42,42,42,42,42,42,42,42,42,54,54,54,54,54,54,54,54,54,54,54,54,54,54,54)
/ selectionmode = list.congruentstimtype.currentindex
</list>
################ test block - 30 incongruent trials ##################
<list incongruentstimtype>
/ items = (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>
<list incongruenthpos>
/ items = (85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,85%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%,15%)
/ selectionmode = list.incongruentstimtype.currentindex
</list>
<list incongruentcresp>
/ items = (42,42,42,42,42,42,42,42,42,42,42,42,42,42,42,54,54,54,54,54,54,54,54,54,54,54,54,54,54,54)
/ selectionmode = list.incongruentstimtype.currentindex
</list>
There is no difference there at all between your congruent and incongruent condition. The respective lists are identical. Hence all your trials are the same.
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Nick00004
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Group: Forum Members
Posts: 12,
Visits: 52
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Right, makes sense. When comparing mine to the original (below) though, it seems to have the same issue with no difference in the actual lists, but it runs fine with 50/50 incongruent/congruent...
Unless there's something obvious I'm missing here
For Congruent Trials (Test Block / 14 Congruent Trials)
*******************************************************************************************************************************
*******************************************************************************************************************************
<list congruentstimtype>
/ items = (1,1,1,1,1,1,1,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>
<list congruenthpos>
/ items = (15%,15%,15%,15%,15%,15%,15%,85%,85%,85%,85%,85%,85%,85%)
/ selectionmode = list.congruentstimtype.currentindex
</list>
<list congruentcresp>
/ items = (42,42,42,42,42,42,42,54,54,54,54,54,54,54)
/ selectionmode = list.congruentstimtype.currentindex
</list>
For Incongruent Trials (Test Block / 14 Incongruent Trials)
*******************************************************************************************************************************
*******************************************************************************************************************************
<list incongruentstimtype>
/ items = (1,1,1,1,1,1,1,2,2,2,2,2,2,2)
/ replace = false
/ selectionrate = trial
</list>
<list incongruenthpos>
/ items = (85%,85%,85%,85%,85%,85%,85%,15%,15%,15%,15%,15%,15%,15%)
/ selectionmode = list.incongruentstimtype.currentindex
</list>
<list incongruentcresp>
/ items = (42,42,42,42,42,42,42,54,54,54,54,54,54,54)
/ selectionmode = list.incongruentstimtype.currentindex
</list>
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Dave
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Group: Administrators
Posts: 13K,
Visits: 104K
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Nick:
your <trial> names are not the point. The point is that you've misspecified one set of condition lists. Keep in mind:
Participants are instructed to press the left shift key when they see a blue square and the right shift key when they see a red square.
A *congruent* trial is when either a blue square is presented on the left side or a red square is presented on the right side.
An *incongruent* trial is when either blue square is presented on the right side or a red square is presented on the left.
Now review your two sets of lists in terms of which stimulus (red / blue) you've paired with which position (left / right).
What you are missing is this:
<list congruenthpos>
/ items = (15%,15%,15%,15%,15%,15%,15%,85%,85%,85%,85%,85%,85%,85%)
/ selectionmode = list.congruentstimtype.currentindex
</list>
...
<list incongruenthpos>
/ items = (85%,85%,85%,85%,85%,85%,85%,15%,15%,15%,15%,15%,15%,15%)
/ selectionmode = list.incongruentstimtype.currentindex
</list>
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Nick00004
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Group: Forum Members
Posts: 12,
Visits: 52
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And THAT'S what I mean by missing something obvious - thanks, Dave. Appreciate the help.
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Dave
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Group: Administrators
Posts: 13K,
Visits: 104K
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