<div dir="ltr">Edit: The video card has 128mb of RAM, not the PC running E-Prime.<div><br></div><div><br><br>On Monday, March 17, 2014 12:37:00 PM UTC-4, 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 David,<div><br></div><div>I believe, together with PST technical support, that we've resolved the issue.</div><div><br></div><div>Here's a brief list of the steps we took to remedy the issue:</div><div><br></div><div>1) The computer running the program was connected to a local area network. While I run the program from the C:\ drive as a means to avoid network failure, I was unaware that being connected to a network could interfere with timing and other issues (i.e., <a href="http://pstnet.com/support/kb.asp?TopicID=5555" target="_blank" onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fpstnet.com%2Fsupport%2Fkb.asp%3FTopicID%3D5555\46sa\75D\46sntz\0751\46usg\75AFQjCNFQk3tiCuu2GGT5CyMZzczXPSnXhw';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fpstnet.com%2Fsupport%2Fkb.asp%3FTopicID%3D5555\46sa\75D\46sntz\0751\46usg\75AFQjCNFQk3tiCuu2GGT5CyMZzczXPSnXhw';return true;">http://pstnet.com/<wbr>support/kb.asp?TopicID=5555</a>).</div><div><br></div><div>2) I removed the ethernet cable from the machine running the flanker task.</div><div><br></div><div>3) I also modified two objects that were in the original file, which can be viewed via the attached screen cap.</div><div><br></div><div>       a. ClearScreen Text Display Object: Previously set to 0; changed to 10ms. With a prior duration of 0, the object was technically still on the screen for a single-screen refresh, which is around 16ms.</div><div>     </div><div>       b. Wait3Seconds Object: Changed the properties - More specifically, I changed the onset sync property from "vertical blank" to "none."</div><div><br></div><div><br></div><div>After making these modifications, the issue *knock on wood* appears to have been resolved. I was concerned that it was a video card issue as the machine we're using is older and only has 128mb of RAM (although these specifications appear adequate for the version of E-Prime we're using 1.2).</div><div><br></div><div><br></div><div>-Nick<br><br>On Thursday, March 13, 2014 3:41:01 PM UTC-4, McFarlane, David wrote:<blockquote class="gmail_quote" style="margin:0;margin-left:0.8ex;border-left:1px #ccc solid;padding-left:1ex">Nick,

<br>

<br>You should definitely take this up with PST Support 

<br>(<a href="https://support.pstnet.com" target="_blank" onmousedown="this.href='https://www.google.com/url?q\75https%3A%2F%2Fsupport.pstnet.com\46sa\75D\46sntz\0751\46usg\75AFQjCNF5BfukPzW6lq7UCweMsMu7_9wJEQ';return true;" onclick="this.href='https://www.google.com/url?q\75https%3A%2F%2Fsupport.pstnet.com\46sa\75D\46sntz\0751\46usg\75AFQjCNF5BfukPzW6lq7UCweMsMu7_9wJEQ';return true;">https://support.pstnet.com</a> ), if you have not already.  And then 

please report back here with the results.

<br>

<br>Thanks,

<br>-- David McFarlane

<br>

<br>

<br>At 3/12/2014 02:38 PM Wednesday, Nick wrote:

<br>>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.

<br>>

<br>><<a href="https://www.dropbox.com/s/npm678rb28vnzu6/ch04-01.avi" target="_blank" onmousedown="this.href='https://www.google.com/url?q\75https%3A%2F%2Fwww.dropbox.com%2Fs%2Fnpm678rb28vnzu6%2Fch04-01.avi\46sa\75D\46sntz\0751\46usg\75AFQjCNHH5BEIa_d3W2jxmPvwQH0oZ0Fh3g';return true;" onclick="this.href='https://www.google.com/url?q\75https%3A%2F%2Fwww.dropbox.com%2Fs%2Fnpm678rb28vnzu6%2Fch04-01.avi\46sa\75D\46sntz\0751\46usg\75AFQjCNHH5BEIa_d3W2jxmPvwQH0oZ0Fh3g';return true;">https://www.dropbox.com/s/<wbr>npm678rb28vnzu6/ch04-01.avi</a>><a href="https://www.dropbox.com/s/npm678rb28vnzu6/ch04-01.avi" target="_blank" onmousedown="this.href='https://www.google.com/url?q\75https%3A%2F%2Fwww.dropbox.com%2Fs%2Fnpm678rb28vnzu6%2Fch04-01.avi\46sa\75D\46sntz\0751\46usg\75AFQjCNHH5BEIa_d3W2jxmPvwQH0oZ0Fh3g';return true;" onclick="this.href='https://www.google.com/url?q\75https%3A%2F%2Fwww.dropbox.com%2Fs%2Fnpm678rb28vnzu6%2Fch04-01.avi\46sa\75D\46sntz\0751\46usg\75AFQjCNHH5BEIa_d3W2jxmPvwQH0oZ0Fh3g';return true;">ht<wbr>tps://www.dropbox.com/s/<wbr>npm678rb28vnzu6/ch04-01.avi</a>

<br>>

<br>>It occurs at trial <<a href="https://support.pstnet.com/requests/395" target="_blank" onmousedown="this.href='https://www.google.com/url?q\75https%3A%2F%2Fsupport.pstnet.com%2Frequests%2F395\46sa\75D\46sntz\0751\46usg\75AFQjCNHCZuDjLlW8JYhuNHUWkbqC1bM9IA';return true;" onclick="this.href='https://www.google.com/url?q\75https%3A%2F%2Fsupport.pstnet.com%2Frequests%2F395\46sa\75D\46sntz\0751\46usg\75AFQjCNHCZuDjLlW8JYhuNHUWkbqC1bM9IA';return true;">https://support.pstnet.com/<wbr>requests/395</a>>#395 of 

>the third test block of "IncOrder" <<a href="https://support.pstnet.com/requests/6" target="_blank" onmousedown="this.href='https://www.google.com/url?q\75https%3A%2F%2Fsupport.pstnet.com%2Frequests%2F6\46sa\75D\46sntz\0751\46usg\75AFQjCNE76o_4Ahaivex4U0JMetet2cgvsQ';return true;" onclick="this.href='https://www.google.com/url?q\75https%3A%2F%2Fsupport.pstnet.com%2Frequests%2F6\46sa\75D\46sntz\0751\46usg\75AFQjCNE76o_4Ahaivex4U0JMetet2cgvsQ';return true;">https://support.pstnet.com/requests/6</a>>#6.

<br>>

<br>>It appears to occur after the offset of the flanker array and before 

>the presentation of visual feedback.

<br>>

>Could this be a hardware issue?

<br>>

<br>>

<br>>-Nick

<br>>

<br>>

<br>>On Tuesday, March 4, 2014 5:43:41 PM UTC-5, Nick wrote:

<br>>Dear All,

<br>>

>I'm hoping to receive some guidance on a strange bug in my E-Prime task.

<br>>

<br>>Here's a brief description of the program:

<br>>

<br>>1. An arrowhead version of the flanker task that consists of 4 

<br>>different stimuli (<<<<<, >>>>>, <<><<, >><>>).

<br>>2. The flanker stimuli are presented in white text against a black 

>background.

<br>>3. There are 3 test blocks that each contain 400 trials and the 

>participant responds using the SRBox.

>4. The task is administered while EEG is continuously recorded.

>5. Each test block lasts for 20 minutes. The total task takes 60 minutes.

<br>>

<br>>Here's a brief description of the problem(s):

<br>>

<br>>1. Each time I run the task, there is one isolated instance where 

>the screen briefly turns white for no more than 300ms.

<br>>

<br>>2. The program continues to run after this occurs and the script 

>always terminates successfully.

<br>>

<br>>3. There is no pattern as to when this occurs (e.g., could be 5 

<br>>minutes in to the task or 15 minutes) and does not appear to be 

>specific to a certain trial # or test block.

<br>>

<br>>Miscellaneous Troubleshooting:

<br>>

<br>>1. I've checked the power settings on the CRT monitor that is used 

<br>>to present the stimuli. The hard drive and monitor have been set to 

>never go on standby or go to sleep.

>2. The script always compiles without any errors.

>3. There are no unreferenced E-objects.

<br>>4. Participants do not have access to the keyboard that is used to 

<br>>execute the task (I viewed several threads (and the PST website) 

<br>>commenting on how this could be triggered by the windows start 

>button on the keyboard)).

<br>>5. I initially thought this could represent a run-time error, but it 

>seems strange to me that it would self-correct and resume.

<br>>

<br>>

>Any thoughts/comments would be much appreciated.

<br>>

<br>>-Nick

<br>

<br></blockquote></div></div></blockquote></div></div>

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