[edited from support email]

I'm currently designing a subliminal priming study and am working on reducing the display time of the subliminal prime (as it can be seen as a flash on the screen). In Windows I have reduced the screen resolution to 800x600 from 1024x768 and raised the refresh rate to 85 hertz from 75 hertz. I then went into DirectRT and changed the resolution to 800x600, after which I ran the refresh rate test in DirectRT, and it indicated a refresh time of 11.77ms. I then lowered the display time for the subliminal prime to 12ms (from 17ms) in my input file. This is where my problem comes in. When I run the experiment in DirectRT, the screen resolution seems to revert back to 1024x768 at 75 hertz (the font of my text looks the same size on the screen in both resolutions, which it shouldn't). When I check the log file, I'm getting the exact same display times for the subliminal prime as I was before I changed all of the resolutions (around 17ms). I tried a few other resolutions and the same thing keeps happening. I have checked the help file and the forums, and did not seem to find anything that would help. Is there anything that can be done, or am I stuck with a display time of around 17ms? Any help would be greatly appreciated.