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Problem with 1st time display

edited March 2019 in OpenSesame

Hello,

I've got a problem that is not that important (I implemented workarounds) but still.

In my experiment (OpenSesame 3.2.7, psycho backend), for the instructions phase, I want to show participants screenshots of the task. The problem is, when I coded the experiment on my computer (Windows 10 17763.369, Graphic card: GTX 660M, latest driver, 1920x1080@60Hz) everything was fine.

But when installed on the test computers (Windows 7 SP1, Graphic card: Radeon HD 7450, don't know driver version, 1920x1080@60Hz), the first screenshot I want to show just doesn't display (I implemented a dummy 0ms canvas with an image and this way, I can display any image I want afterwards). The very first fixation dot of the experiment is also randomly distorted (same workaround, dummy 0ms fixdot and everything's fine). Finally, my color wheel looks also a bit worse on the test computers.

Do you have any idea why this is happening? Should I maybe upgrade the graphics driver of the test computers?

Thanks for your insights,

Best,

Zgolot.

Comments

  • Hi Zgolot,

    I'm not familiar with this problem. In general, and as you suggest, it sounds like something that has to do with the graphics drivers.

    Your workaround seems ok to me, but to be safe I would check one thing: Is it the case that the first display is distorted (in which case your workaround is solid), or is it the case that each display is shown only when the next display should be shown (in which case something is seriously wrong). Do you see what I mean?

    Cheers!

    Sebastiaan

    Buy Me A Coffee

  • Hi sebastiaan,

    thank you for your answer and for your reassuring comment on my workaround.

    I think that from the two cases you describe, it is the former that applies to me. Do you have any idea on how I could check that it really is the former?

    Thanks,

    Zgolot.

  • > Do you have any idea on how I could check that it really is the former?

    You could show a first sketchpad with a "1" on it, then wait for the a second, and then show a second sketchpad with a "2" on it. Then if you run and the experiment and see the number "2" after a second, you know that it's indeed just the first display that's garbled.

    Buy Me A Coffee

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