Unable to initialize item number 1. Verify the item exists and is correctly defined.


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james.schmidt
james.schmidt
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I am new to Inquisit and receiving the above error message that I am not sure I understand after a bunch of sanity checks. The offending line of code seems to be here:

<picture primeS>
/ items = ("<%values.currShape%>")
/ size = (15%,15%)
</picture>


The values.currShape item will change on each trial on the basis of ontrialbegin code like the following:

/ ontrialbegin = [values.randNum = rand(0,3); values.currWord=""; values.distType=2;
if(values.randNum < 1){values.currShape=values.shape1; values.contingency=0;}
else if(values.rndNumber < 2){values.currShape=values.shape2; values.contingency=1;}
else{values.currShape=values.shape3; values.contingency=1;}]

The values.shape1, values.shape2, and values.shape3 file names are themselves set earlier with an onexptbegin randomization:

/ onexptbegin=[if (values.rndShape==0){values.shape1=values.shapeA; values.shape2=values.shapeB; values.shape3=values.shapeC;}
else if (values.rndShape==1){values.shape1=values.shapeA; values.shape2=values.shapeC; values.shape3=values.shapeB;}
else if (values.rndShape==2){values.shape1=values.shapeB; values.shape2=values.shapeA; values.shape3=values.shapeC;}
else if (values.rndShape==3){values.shape1=values.shapeB; values.shape2=values.shapeC; values.shape3=values.shapeA;}
else if (values.rndShape==4){values.shape1=values.shapeC; values.shape2=values.shapeA; values.shape3=values.shapeB;}
else{values.shape1=values.shapeC; values.shape2=values.shapeB; values.shape3=values.shapeA;}]

I have confirmed that: valuesA, valuesB, and valuesC are being correctly assigned to values1, values2, and values3 (onexptbegin code above), and that currShape is correctly taking on a trial-by-trial basis one of these values based on a random calculation (ontrialbegin code above). I have also confirmed that picture objects can take code like:

items = ("<%values.[_something_]%>")

as long as the value does not change (???).
I have also confirmed that literally identical code for text objects works exactly as intended, as in:

<text primeW>
/ items = ("<%values.currWord%>")
/ color = black
</text>

The fact that it works for text but not pictures is particularly confusing. Am I trying to do something that is impossible in Inquisit? Note that trying to make multiple versions of the stimulus assignments with subjects = (1 of x) type code is definitely not feasible for this particular experiment where there are way too many combinations of stimulus assignments. It needs to be randomized somehow. Thanks for any suggestion.

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