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Randomization order of stimuli

Hi,
I'am struggling with the set up of an experiment where I want to present X's and O's in a 3x3 grid at predefinied positions but at random order. Most important is that the stimuli should stay on the screen until 7 stimuli are presented (so adding stimuli one after another always after 600ms). I already watched the tutorial on the visual search experiment but can't finde any solution for defining the onset or the order of stimuli but not the position.

Many thanks in advance,
Marie

Comments

  • Hi Marie,

    What exactly does not work? Randomizing the positions, the order or the duration of the stimuli? And with what code are you trying it currently.

    Thanks,
    Eduard

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