Why can I see my subliminal stimuli?

[jarvis24]

That is very unusual, I haven't heard of variance of that degree before. In your main DirectRT window, do you have an UPDATE option? If so, can you click to update your beta to the most recent version and see if the image priming sample gives you a similar pattern of data? I'll pass this on to Trevor our lead programmer who might have additional suggestions. Attaching a dxdiag.txt file could also help so we can see the details of your hardware (e.g., to figure out why v2006 could perform better on this machine).

[ssmith]

I updated the beta version so it's now 2010.124.820.10, but the timings are still too long. With the images sample, the timings run from 574-596 (instead of 500) and 125-197 (instead of 100). With my own .csv file, I'm also seeing extremely long timings (63-172, though it's set for 35). I'm not sure what a dxdiag.txt file is...

I have my program running in windowed mode, though I have some colleagues who are using the full screen and have the same problems.

Is there any way we could talk directly tomorrow afternoon to try to get this sorted out? Trevor once helped me by logging into my computer and looking at the files I was using. Is that a possibility?

[ssmith]

Here's the dxdiag.txt (I figured it out...)

[jarvis24]

SSmith,

I took a look at your dxdiag.txt file, thank you, and all seems normal. I am going to run through the same input files using the same version of the beta you are using. There is a more recent version of the package available and that may help but I will test both versions on one of our XP machines here and see if I can replicate the RT variances you are seeing. Fair to assume you did not change the resolution/style files in any way on the samples?

Blair

[ssmith]

Thank you for your response. I will try updating to the newest version and get back to you. Please let me know what the outcomes are of your tests. And no, we did not change anything with the resolution or style files with the samples.

[ssmith]

I tried to update DirectRT to a newer version of the beta, but it seems that the most recent update is the version we're already running (2010.124.820.10). Is there another way to get the update?

I know that the version of the beta that was available Nov/Dec 2009 did not have this problem on these computers b/c I was pilot testing a study with it and the primes weren't visible.

I'll await the results of your testing.

[ssmith]

[edited by moderator] ... my dept's computer person put the 2010 beta on a newer computer and the program is now working fine. I'm not sure what changed in the beta version from last Nov/Dec to now, but whatever it is does not allow it to work properly on older computers.