Randomisation with constraints

Online experiments
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9

Hello Viviana

might need some testing, but the following code should mix randomly pictures with sounds and presents two different sounds to each picture (I’m using text-components instead of pictures and sounds):

Begin Experiment tab:

list_ok = False
double_stim = False
picture = " " 
soundfile = " " 
ldx = 0

index = [x for x in range(96)]
shuffle(index)

picList = [x for x in range(48)]*2
picList.sort()
    
wavfileList = [x for x in range(24)]*4
shuffle(wavfileList)

while list_ok == False:
    for i in range(len(wavfileList) - 1):
        # check for equal neighbours:
        if wavfileList[i] == wavfileList[i + 1]:
            double_stim = True  # D'oh!
            break  # can stop checking on this run            
    if double_stim == True:
        shuffle(wavfileList)  # try a new order
        double_stim = False
    else:
        list_ok = True  # Yay! The loop won't run again.

Begin Routine tab

ldx = index.pop(0)
picture = picList[ldx]
soundfile = wavfileList[ldx]

End routine tab

thisExp.addData("picture", picture)
thisExp.addData("sound", soundfile)

picture and sound are two variables which I display via two text-components.

grafik
grafik1107×241 3.21 KB

The trial is repeated with the help of a loop

grafik

grafik

You need some code to read in your stimuli. I used numbers to simplify it for me.

Best wishes Jens

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