<div dir="ltr"><p style="line-height: 22px; font-family: 'Lucida Sans Unicode', 'Lucida Grande', Tahoma, Verdana, sans-serif; margin-top: 15px; margin-bottom: 15px; font-size: 14px; color: rgb(43, 46, 47);">I've recorded a video of the presence of the white screen, and have provided a link to the file that is stored by Dropbox.</p><p style="line-height: 22px; font-family: 'Lucida Sans Unicode', 'Lucida Grande', Tahoma, Verdana, sans-serif; margin-top: 15px; margin-bottom: 15px; font-size: 14px; color: rgb(43, 46, 47);"><a href="https://www.dropbox.com/s/npm678rb28vnzu6/ch04-01.avi" target="_blank" style="color: rgb(17, 85, 204);">https://www.dropbox.com/s/<wbr>npm678rb28vnzu6/ch04-01.avi</a></p><p style="line-height: 22px; font-family: 'Lucida Sans Unicode', 'Lucida Grande', Tahoma, Verdana, sans-serif; margin-top: 15px; margin-bottom: 15px; font-size: 14px; color: rgb(43, 46, 47);">It occurs at trial <a href="https://support.pstnet.com/requests/395" target="_blank" style="color: rgb(17, 85, 204);">#395</a> of the third test block of "IncOrder" <a href="https://support.pstnet.com/requests/6" target="_blank" style="color: rgb(17, 85, 204);">#6</a>.</p><p style="line-height: 22px; font-family: 'Lucida Sans Unicode', 'Lucida Grande', Tahoma, Verdana, sans-serif; margin-top: 15px; margin-bottom: 15px; font-size: 14px; color: rgb(43, 46, 47);">It appears to occur after the offset of the flanker array and before the presentation of visual feedback.</p><p style="line-height: 22px; font-family: 'Lucida Sans Unicode', 'Lucida Grande', Tahoma, Verdana, sans-serif; margin-top: 15px; margin-bottom: 15px; font-size: 14px; color: rgb(43, 46, 47);">Could this be a hardware issue?</p><p style="line-height: 22px; font-family: 'Lucida Sans Unicode', 'Lucida Grande', Tahoma, Verdana, sans-serif; margin-top: 15px; margin-bottom: 15px; font-size: 14px; color: rgb(43, 46, 47);"><br></p><p style="line-height: 22px; font-family: 'Lucida Sans Unicode', 'Lucida Grande', Tahoma, Verdana, sans-serif; margin-top: 15px; margin-bottom: 15px; font-size: 14px; color: rgb(43, 46, 47);">-Nick</p><div><br></div><br>On Tuesday, March 4, 2014 5:43:41 PM UTC-5, Nick wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;"><div dir="ltr">Dear All,<div><br></div><div>I'm hoping to receive some guidance on a strange bug in my E-Prime task. </div><div><br></div><div>Here's a brief description of the program:</div><div><br></div><div>1. An arrowhead version of the flanker task that consists of 4 different stimuli (<<<<<, >>>>>, <<><<, >><>>).</div><div>2. The flanker stimuli are presented in white text against a black background. </div><div>3. There are 3 test blocks that each contain 400 trials and the participant responds using the SRBox. </div><div>4. The task is administered while EEG is continuously recorded.</div><div>5. Each test block lasts for 20 minutes. The total task takes 60 minutes.</div><div><br></div><div>Here's a brief description of the problem(s):</div><div><br></div><div>1. Each time I run the task, there is one isolated instance where the screen briefly turns white for no more than 300ms. </div><div><br></div><div>2. The program continues to run after this occurs and the script always terminates successfully. </div><div><br></div><div>3. There is no pattern as to when this occurs (e.g., could be 5 minutes in to the task or 15 minutes) and does not appear to be specific to a certain trial # or test block.</div><div><br></div><div>Miscellaneous Troubleshooting:</div><div><br></div><div>1. I've checked the power settings on the CRT monitor that is used to present the stimuli. The hard drive and monitor have been set to never go on standby or go to sleep.</div><div>2. The script always compiles without any errors.</div><div>3. There are no unreferenced E-objects.</div><div>4. Participants do not have access to the keyboard that is used to execute the task (I viewed several threads (and the PST website) commenting on how this could be triggered by the windows start button on the keyboard)).</div><div>5. I initially thought this could represent a run-time error, but it seems strange to me that it would self-correct and resume.</div><div><br></div><div><br></div><div>Any thoughts/comments would be much appreciated.</div><div><br></div><div>-Nick</div><div><br></div><div><br></div></div></blockquote></div>
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