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Experiment Freezing/Slowing Mid-Presentation

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  • Experiment Freezing/Slowing Mid-Presentation

    I am currently working on an experiment that occasionally slows and/or Afreezes (or registers as "not responding") in the midst of the experiment. Occasionally, stimulus that should remain on the screen a max of 2s remains 10-15 seconds. Subsequent stimuli are presented too quickly.

    It is not consistent, and I cannot find any pattern to the freezing (i.e. it does not work better the first loading as in ). When it freezes, pressing 'esc' seems to do nothing.

    Additional Info:
    -The experiment consists of 3 blocks of 500 visual stimuli (taken from 3 stimulus lists). Stimuli are .jpg files, between 40-65kb. Participant response is recorded via SV1 voice key attached by serial port.

    -The computer (I have tried on several in my lab) has approx 123GB of free space and 3GB of RAM. The PC runs Windows XP Pro 5.1.

    -I am running the latest Superlab Version (4.5)

    -Under options, I have selected to load files trial by trial.

    Does anyone have any suggestions? Can anyone think of something I am missing? Any help would be much appreciated!

    p.s. The only pattern I see is that I struggle to replicate the freeze by myself, but it appears when i have participants in the lab!

  • #2

    i tried running an earlier version (4.0.7b) as suggested in and had the same freezing issues.

    what do you all think?


    • #3
      Thank you for the information. Do you think you can post your experiment as an Experiment Package to see if we can duplicate the freezing?


      • #4
        Packaged Experiment


        I have attempted to attach the packaged experiment (.zip @49MB), but I have received an error message as follows:

        "Your submission could not be processed because a security token was
        If this occurred unexpectedly, please inform the administrator and describe the action you performed before you received this error."

        Let me know any other way I can submit this to you.



        • #5
          I will contact you via private message regarding this.