assignment of a randomly selected picture


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Jens Bölte
Jens Bölte
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Posts: 78, Visits: 60

Hello,


I want to select one of two pictures (a vertical or a horizontal dot probe). I tried the following code (see below). The assignment works but unfortunately the script only selects the first of the two dot probes. The fixation cross is replace by the dot probe, but only by the horizontal dots. The vertical dots are never selected. Suggestions?


In addition, I'd like to record the selected dot probe and store its value in the data file.


<picture dot.hor.ver.pic>
/items = ("Stimuli/DotHor.png" , "Stimuli/DotVer.png")
/select = noreplace
</picture>

<picture dot.pic>
/items = ("Stimuli/Fixation.png")
</picture>


<trial m.an.o.tar>
/ ontrialbegin = [picture.dot.pic.items.1 = picture.dot.hor.ver.pic.currentitem]
/ stimulusframes = [10 = fixation.pic; 55 = maske; 56 = m.neu.pic, m.an.pic; 58 = mask1.pic, mask2.pic; 65 = maske; 66 = dot.pic]
/ validresponse = ("F", "J")
/ correctresponse = ("F")
/ timeout = 3000
</trial>



Best regards Jens









GO

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