MediaLab Stroop Test having intermittent crashes

[irving]

Hi,

I'm working on running a stroop test (a demo measuring reaction time by asking participants to name the color displayed - it's rather difficult because somethings the text of the color does not match it's visual color) by embedding html pages w/ javascript and jquery within MediaLab. The questionnaire has 100 trials, which run very quickly (because jquery automatically reads each key stoke and attempts to submit it). Though most typical participants take a few seconds to response, I want to make sure this runs smoothly at a rate of about 1 response/1sec.

Sometimes, I'm able to run through all 100 trials with no problem and perfect data recording. Other times, I crash around the 20th trail, and upon restarting, I crash sooner. I then run a completely different questionnaire, return to the stroop test, and it works fine.

This is the error I get when it crashes:

 
Problem signature:
Problem Event Name: APPCRASH
Application Name: MediaLab.exe
Application Version: 2008.1.0.33
Application Timestamp: 491a4789
Fault Module Name: ieframe.DLL
Fault Module Version: 8.0.7600.16625
Fault Module Timestamp: 4c2ae03f
Exception Code: c0000005
Exception Offset: 0013bc36
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 18e6
Additional Information 2: 18e6988f36a34ba4f53a32a1e3c6468d
Additional Information 3: 9183
Additional Information 4: 9183550c833080f96569a5bea4bcc057
 
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Please let me know if you can help, or if you would like to see source code for further clarification.

Previous reponse from support

This problem seems sporadic; however, an easy solution may be viable. My first thought is to perhaps try restarting the software after an experiment has run. Have you encountered this error while first running through your experiment after the software's initial launch?

This was my answer:

I've tested it two ways - beginning with the stroop test, and beginning with a different questionnaire, followed by the stroop test. In both setups, the program continues to crash.

I know it's difficult to diagnose because its sporadic. Are there other methods I can run to diagnose the problem?

[jarvis24]

Are you collecting the responses via voice response in MediaLab? If so that could account for the problem and shutting MediaLab down (i.e., exiting the program completely) between sessions has fixed this in the past. If it's a key response then that would be more unusual. Note also that if you have DirectRT, it comes with a voice response Stroop task sample that works very nicely.