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  • Change Blindness Problem

    Hello,

    I am trying to build a simple Change Blindness experiment in which the focal point of change will be facial expressions. However, when I try to set up the experiment the trials never seem to go in order!

    I wish to present:

    UnchangedPhoto
    GreyMask
    ChangedPhoto
    GreyMask
    etc...

    But when I run the experiment it goes in that order for about two iterations and then it just plays them back randomly. However, when I change the stimulus to just text it works fine. I'm sure I am doing something incorrectly but I would be very grateful for any help!

    - David
    Attached Files

  • #2
    I downloaded the experiment. Is it the same one that you are describing? It has only a single trial. Also, the structure of the trial should include a second grey mask. Currently, you have only
    UnchangedPhoto
    GreyMask
    ChangedPhoto

    It needs to be more like
    UnchangedPhoto
    GreyMask 1
    ChangedPhoto
    GreyMask 2

    Side note: you are using SuperLab 5.0.2. I recommend that you get the latest version 5.0.4 which fixes the unwanted black border bug that you described a few months ago. Thank you for reporting that bug.

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    • #3
      I will upgrade ASAP! I will include the second grey mask trial. I had the experiment set to repeat 10 times but I may have done that incorrectly. I will try again!

      Thank you!

      Comment


      • #4
        Hisham,

        That did the trick. Thank you! It seems like it's always the smallest things that cause the biggest problems!

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