Hi,
I have just started using Inquisit for two weeks now.
I am trying to create an experiment where 3 images are shown one after the other in 3 different locations on the screen.
I am randomly pairing 3 images together without replacement after which they will be presented in the sequence below. I would like to present the same sequence, the same pairings, same image locations once again to the same participant.
The next participant will get a different pairing and so on.
So one block would be
Study trial :
1st presentation: Fixation cross -> image1 -> image2-> image3 -> Fixation cross -> image4 -> image5-> image6 -> Fixation cross -> image7 -> image8-> image9 -> Fixation cross -> image10 -> image11-> image12
Repeat presentation: Fixation cross -> image1 -> image2-> image3 -> Fixation cross -> image4 -> image5-> image6 -> Fixation cross -> image7 -> image8-> image9 -> Fixation cross -> image10 -> image11-> image12
Test Trial: ...
More blocks of the same type would follow with a study trial (fixation plus 12 images presented twice) and then a test trial immediately after.
So far, I have been successful in randomly pairing the images in groups of 3, presenting the images, storing their locations, and the name of the image presented.
Please help me code how to present the same sequence once more.
Thanks!
This is my code so far...
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PARAMETERS
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<parameters>
/ stimsize = 17%
/ stimulusduration = 1000
</parameters>
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STIMULI
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<item oldstims>
/1="1.jpg"
/2="2.jpg"
/3="3.jpg"
/4="4.jpg"
/5="5.jpg"
/6="6.jpg"
/7="7.jpg"
/8="8.jpg"
/9="9.jpg"
/10="10.jpg"
/11="11.jpg"
/12="12.jpg"
</item>
<item fixationcross>
/1="fixation.png"
</item>
<picture fixation>
/ items = item.fixationcross
/ position = (50%, 50%)
/ size = (40%,40%)
/ valign = center
/ halign = center
</picture>
<picture tripletimage>
/ items = item.oldstims
/ select = values.tripletimage
/ size = (parameters.stimsize, parameters.stimsize)
</picture>
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VALUES: automatically updated
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<values>
/ index = 1
/ tripletimage = 1
</values>
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LISTS
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<defaults>
/ canvasaspectratio = (1,1)
/ minimumversion = "6.5.1.0"
/ fontstyle = ("Arial", 3%, false, false, false, false, 5, 1)
/ txbgcolor = white
/ txcolor = black
/ screencolor = white
</defaults>
<list xpos>
/ items = (25%, 75%, 50%)
/ replace = false
/ selectionrate = always
</list>
<list ypos>
/ items = (25%, 25%, 75%)
/ selectionmode = list.xpos.currentindex
/ selectionrate = always
</list>
<list imagenumbers>
/ items = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
/ replace = false
/ resetinterval = 0
/ selectionrate = always
</list>
<list tripletnumbers>
/ select = values.index
/ selectionrate = always
</list>
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DATA
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***********************
raw data file
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<data>
/ columns = (build, computer.platform, date, time, subject, group, session,
blockcode, blocknum, trialcode, trialnum, stimulusnumber, stimulusitem, picture.tripletimage.hposition, picture.tripletimage.vposition,
parameters.stimulusduration, expressions.canvasRatio)
</data>
<expressions>
/canvasRatio = (display.canvasheight/display.height)*100
/locationx =
</expressions>
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TRIALS
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<trial pairings>
/ ontrialbegin = [
if (parameters.randomPairings == 1){
values.index = list.tripletnumbers.nextvalue;
list.imagenumbers.insertitem(values.index, 1);
} else {
values.index += 1;
list.imagenumbers.insertitem(values.index, 1);
};
]
/ branch = [
if (list.imagenumbers.itemcount < 3){
return trial.pairings;
};
]
/ recorddata = false
/ trialduration = 0
</trial>
<trial encodingfixation>
/ stimulustimes = [0=fixation]
/ timeout = parameters.stimulusduration
</trial>
<trial encodingimage>
/ ontrialbegin = [
values.tripletimage = list.imagenumbers.nextindex;
picture.tripletimage.hposition = list.xpos.nextvalue;
picture.tripletimage.vposition = list.ypos.nextvalue;]
/ stimulustimes = [0=picture.tripletimage]
/ timeout = parameters.stimulusduration
</trial>
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BLOCKS
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<block pairings>
/ onblockbegin = [
list.imagenumbers.reset();
values.index = 0;
]
/ trials = [1 = pairings]
</block>
<block encodingphase>
/ trials = [1 = encodingfixation; 2 = encodingimage; 3 = encodingimage; 4 = encodingimage;
5 = encodingfixation; 6 = encodingimage; 7 = encodingimage; 8 = encodingimage;
9 = encodingfixation; 10 = encodingimage; 11 = encodingimage; 12 = encodingimage;
13 = encodingfixation; 14 = encodingimage; 15 = encodingimage; 16 = encodingimage;
]
</block>
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EXPERIMENT
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<expt>
/ blocks = [1= pairings; 2 = encodingphase]
</expt>