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Web Participant Log Questions


Web Participant Log Questions
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jbfleming
jbfleming
jbfleming
posted 10 Years Ago HOT
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Having been running our study for a few weeks now, I wanted to get a better understanding of what is going on with the data in the web participant log so we can understand why/how we are losing the people we are losing.

The first thing that sticks out to me is the summary says only one participant has completed the study, but we have data from over 50 who completed the study. What increments this number?  It would be strange even if it were just way too low, but that it is stuck at one seems even stranger.

Second, we've lost 10 participants due to errors, that look like mostly Direct2D calls failing. Here are some sampleS:
Direct2D Error: 0x88982f80 The pixel format is not supported. Line 259, File win\Direct2DGraphics.cpp
Direct2D Error: 0x8899000c A presentation error has occurred that may be recoverable. The caller needs to re-create the render target then attempt to render the frame again. Line 765, File win\Direct2DGraphics.cpp
DXGI Error: 0x887a0002 Unknown error 0x-2005270526lX Line 454, File win\Direct2DGraphics.cpp

I know when I traced one of these errors back to the script that crashed, it was a portion of the study that just has an openended text box in it, nothing fancy (It does use /isvalidresponse and latency to enforce staying on the page at least 30 seconds, but that isn't a graphics call)

We also have 16 who "failed to launch." Can someone tell me what condition is counted as failed to launch? Is it user error?

85 of 95 participants who consented look like they got as far as the launch page, but due to all of these various failures/dropouts, we've lost about 30 of them. We just want to understand what the conditions are that would lead to this beyond simple drop-out. We need a good understanding so we can do further analysis and see if those who fail to launch or drop out share any characteristics.

Thanks,
John
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Web Participant Log Questions
jbfleming - 10 Years Ago
     > The first thing that sticks out to me is the summary says only...
Dave - 10 Years Ago
     We are just concerned because of the people who screen in and go to...
jbfleming - 10 Years Ago
             The error points to an issue with the script. You should check the...
Dave - 10 Years Ago
     The file has remained unchanged and hasn't caused this error for...
jbfleming - 10 Years Ago
             He might be running a system with an odd, extremely slow refresh rate....
Dave - 10 Years Ago
             This is exactly what I laid out in my previous response: /...
Dave - 10 Years Ago
                 Yes, looks like we cross posted.
seandr - 10 Years Ago
                     Yes, but wasn't referring to your response (hadn't even seen it yet)...
Dave - 10 Years Ago
                     FYI - I uploaded a fix to the activity reports on Friday that fixes...
seandr - 10 Years Ago
                         The participant log does appear to have much more accurate counts now....
jbfleming - 10 Years Ago
     Here's the block in question: <trial...
jbfleming - 10 Years Ago
     The reason this might show up sporadically is that it depends on the...
Admin - 10 Years Ago
     Okay, yeah, my understanding was if I used milliseconds it would get...
jbfleming - 10 Years Ago

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