MATLAB: Using Compound to match image/audio/written words

psychtoolbox

I'm using Psychtoolbox to built an experiment using stimuli from different modalities, grouped in different array( audio, image and written words). The item in the differents modalities has to be compound, cause 5 item will be inittialy presented and later recognized within a mixed sequence in all modalities:
I did this code
ImageList={imagelist.jpg}
wordList={words}
soundlist={soundlist.wav};
correctness=[1 1 1 1 1 2 2 2 2 2 2  2 2 2 2 2 2 2 2 2 2 2  2 2 2 2 2  2 2 2 2 2 2 2 2 2 2 2];
for k=1:38
  compound{k,1}=wordList{k};
  compound{k,2}=MyImages{k}; 
  compound{k,3}=word{k}; 
end
randcompound= Shuffle(compound);
for k=1:38 
randcompound{k,4}=correctness(k);   
end
The compound works, but when I shuffle it in randcompound it mix everything.
Any suggestion?

Best Answer

ImageList={imagelist.jpg}   %assumes imagelist is a struct array with field named 'jpg'
wordList={words}
soundlist={soundlist.wav};  %assumes soundlist is a struct array with field named 'wav'
Compound(:,1) = ImageList(:);
Compound(:,2) = wordList(:);
Compound(:,3) = soundlist(:);
Compound(:,4) = num2cell( correctness(:) );
ncomp = size(Compound, 1);
randidx = randperm(ncomp);
randcompound = compound(randidx, :);
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