screen flashes between each trial (case 5751)

[leahz]

I'm running Medialab 2008.1.22. Thanks.

[jarvis24]

Hmm.. Seems to work fine here--at least the basic sample that comes with MediaLab. Not sure what this could be. Did you change the colors in the preferences at all, or are you using a quickstyle anywhere? When you say it changes to the background color, what color is that? And what color does it go to when the next question resumes? I ask all this because normally (by default) those colors are the same.

[leahz]

Yes, I changed the background color to a blue - blue is always the background color. So, in between each frame, there is a quick flash where the screen is completely blue, and then it shows the next frame, where the background is blue again. This is a problem for 2 reasons:

1. I want participants to make several ratings of one photo, so for several frames I have the same photo, with just the rating scale changing. It is distracting that after each response, the photo flashes away and back. In the old version I used to use, if something was in the same place from frame to frame, it would just stay there.
2. At one point I want to show a black screen, and then the black screen with a fixation point. I can't have a flash of blue in between the two screens or the effect won't work.

[irving]

Are there any updates related to this issues? I'm also experiencing a similar issue where I apply my own mystyle.mlq file, but between each question, the program has to reapply my blue custom background over the default MediaLab background, producing the flash sensation.

Is there a way to change the default background and font color, other than using mystyles, in such a way that it does not produce the flashing effect?

[jarvis24]

A newer version you can try..

www.empirisoft.com/download/ml2008/ml2008.1.33e.exe

Please let me know if it helps,
Blair

[kirillf5@gmail.com]

Is there any solution to this issue?

I have the same problem where a questionnaire has a non default background and for every item the default background flashes.

[jason_reed]

What version of MediaLab are you using? You can find the full version number (ver. 20xx.x.xxx) by opening MediaLab and selecting Help>About MediaLab from the main toolbar.