<div dir="ltr">Hi David, Ryan Whitfield just replied me with the same information. I am really please with their velocity to reply. <br>Thank you very much for your support. I am also glad that I don't have to install a new OS on the machine :)))<br><br>Best Regards,<br>Valerio <br><br>On Friday, 27 September 2013 22:08:55 UTC+1, McFarlane, David wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">Oops, my apology, I see that I just repeated what David Vinson
<br>(quoting PST Support) already said.
<br>
<br>-- David McFarlane
<br>
<br>
<br>At 9/27/2013 11:42 AM Friday, David McFarlane wrote:
<br>>If you just unplug your computer from the network while running
<br>>E-Prime experiments (as advised in the E-Prime User's Guide), not
<br>>only will you disable clock synchronization, you will also avoid
<br>>other timing interferences due to network activities.
<br>>
<br>>-- dkm
<br>>
<br>>
<br>>At 9/27/2013 11:33 AM Friday, David Vinson wrote:
<br>>>Hi Vaaal,
<br>>>
<br>>>I had some exchanges with PST support about the clock issues with
<br>>>WinXP, here's what they told me at the time:
<br>>>
<br>>>>Windows XP sometimes causes the speed of the processor to be
<br>>>>reported as the clock frequency. When the speed of the processor
<br>>>>changes during an experiment, this can interfere with E-Prime's
<br>>>>timing. Therefore, our developers have advised that some users
<br>>>>with Windows XP may need to switch over to the power management
<br>>>>clock. I have attached a document explaining how to make this
<br>>>>change. Once the change has been made, E-Prime will use the power
<br>>>>management clock on your system, which should perform much better
<br>>>>than the default clock. Note that this involves changing your
<br>>>>system's Boot.ini file, so we strongly recommend backing up your
<br>>>>system before performing these actions.
<br>>>>
<br>>>>Also, you should consider turning off clock synchronization, at
<br>>>>least while running E-Prime experiments. It should only occur
<br>>>>occasionally, but your network might have different custom
<br>>>>settings. Please see the following Microsoft article for more
<br>>>>information:
<br>>>><a href="http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/windows_date_turn_off_synch.mspx?mfr=true" target="_blank">http://www.microsoft.com/<wbr>resources/documentation/<wbr>windows/xp/all/proddocs/en-us/<wbr>windows_date_turn_off_synch.<wbr>mspx?mfr=true</a>.
<br>>>>Of course, the simplest way to turn it off during an experiment is
<br>>>>to physically unplug the cable from the computer. You should not
<br>>>>have any other programs or processes running during the experiment
<br>>>>anyway, so unplugging it should not cause any problems.
<br>>>
<br>>>The document mentioned in the first paragraph includes instructions
<br>>>on how to switch the power management clock by editing boot.ini -
<br>>>I'm sure PST support will pass that information along to you in due course.
<br>>>
<br>>>Hope this helps,
<br>>>(A different) David
<br>>>
<br>>>
<br>>>On 27/09/2013 16:24, Vaaal wrote:
<br>>>>Hi David,
<br>>>>thank you for your advice, I got it.
<br>>>>What actually concerns me is this one, since my machine in the lab
<br>>>>run exactly Windows XP: "The E-Prime Primary Clock is configured
<br>>>>in a way that could cause timing inconsistencies on Windows XP.
<br>>>>Contact PST Tech Support to configure the clock for more
<br>>>>stabilized performance when using Windows XP with this finding". I
<br>>>>contacted the PST tech support but still no reply. In the
<br>>>>meantime, do you have any knowledge about that? Should I install a
<br>>>>new OS in my lab machine?
<br>>>>
<br>>>>On Friday, 27 September 2013 15:49:28 UTC+1, McFarlane, David wrote:
<br>>>>
<br>>>> Valerio,
<br>>>>
<br>>>> You can puzzle this out for yourself. Try the following. Open a
<br>>>> blank (Professional) experiment. Run it. Now look at the resulting
<br>>>> ExperimentAdvisorReport.xml. See the Experiment Advisor Modules
<br>>>> table? Does it include all the same items as before, even though the
<br>>>> experiment is completely blank?
<br>>>>
<br>>>> Now disable some of the Experiment Advisor Modules. E.g., back in
<br>>>> E-Studio, open the Experiment Object Properties, go to the Experiment
<br>>>> Advisor tab, and disable "Use of ClearAfter" and "Use of
<br>>>> Stretch". Run this, open the resulting ExperimentAdvisorReport.xml,
<br>>>> and look at the Experiment Advisor Modules table. Do you see that
<br>>>> "An object has its ClearAfter property set to Yes..." and "A visual
<br>>>> object has its Stretch property set to Yes..." have both disappeared?
<br>>>>
<br>>>> From this evidence would you conclude that the Experiment Advisor
<br>>>> Modules table tells you only what modules were enabled, and not what
<br>>>> problems it found? Would you find this useful, because without this
<br>>>> information you could not tell whether the lack of a warning only
<br>>>> meant that that test was not run?
<br>>>>
<br>>>> As usual, do not take my word for any of this, test it out for
<br>>>> yourself. I presented my answer this way because I need to stress
<br>>>> that I do not have any inside knowledge about E-Prime, I simply
<br>>>> figure it out exactly as I outlined above.
<br>>>>
<br>>>> Best regards,
<br>>>> -----
<br>>>> David McFarlane
<br>>>> E-Prime training
<br>>>> online: <a href="http://psychology.msu.edu/Workshops_Courses/eprime.aspx" target="_blank">http://psychology.msu.edu/<wbr>Workshops_Courses/eprime.aspx</a>
<br>>>> <<a href="http://psychology.msu.edu/Workshops_Courses/eprime.aspx" target="_blank">http://psychology.msu.edu/<wbr>Workshops_Courses/eprime.aspx</a>>
<br>>>> Twitter: @EPrimeMaster (<a href="https://twitter.com/EPrimeMaster" target="_blank">https://twitter.com/<wbr>EPrimeMaster</a>
<br>>>> >> > <<a href="https://twitter.com/EPrimeMaster" target="_blank">https://twitter.com/<wbr>EPrimeMaster</a>>)
<br>>>>
<br>>>> /----
<br>>>> Stock reminder: 1) I do not work for PST. 2) PST's trained staff
<br>>>> take any and all questions at
<br>>>> <a href="http://support.pstnet.com/e%2Dprime/support/login.asp" target="_blank">http://support.pstnet.com/e%<wbr>2Dprime/support/login.asp</a>
<br>>>> <<a href="http://support.pstnet.com/e%2Dprime/support/login.asp" target="_blank">http://support.pstnet.com/e%<wbr>2Dprime/support/login.asp</a>> , and they
<br>>>> strive to respond to all requests in 24-48 hours, so make full use of
<br>>>> it. 3) In addition, PST offers several instructional videos on their
<br>>>> YouTube channel (<a href="http://www.youtube.com/user/PSTNET" target="_blank">http://www.youtube.com/user/<wbr>PSTNET</a>
<br>>>> >> > <<a href="http://www.youtube.com/user/PSTNET" target="_blank">http://www.youtube.com/user/<wbr>PSTNET</a>> ). 4) If you do
<br>>>> get an answer from PST staff, please extend the courtesy of posting
<br>>>> their reply back here for the sake of others.
<br>>>> \----
<br>>>>
<br>>>>
<br>>>> At 9/26/2013 05:01 PM Thursday, Vaaal wrote:
<br>>>> >Quick question about this interesting feature of e-prime. When I
<br>>>> >open the xml I can read several tables. Although it is clear for me
<br>>>> >the meaning of onset to onset stats, onset delay stats, load time
<br>>>> >stats and experiment advisor finding, the last table is a little bit
<br>>>> >more difficult for me to understand: Experiment Advisor Modules.
<br>>>> >I was checking this table when I notice that most of the "problem"
<br>>>> >pointed out by this table was actually not relevant for my
<br>>>> design. For example:
<br>>>> > "A visual object has its Stretch property set to Yes, which can
<br>>>> > cause display timing anomalies. Instead of using Stretch, consider
<br>>>> > editing the source material to match the size and proportions you
<br>>>> > want to display during the experiment".
<br>>>> >But no visual object in my experiment has stretch set to Yes. Or,
<br>>>> again:
<br>>>> >"An object has its ClearAfter property set to Yes. ClearAfter is a
<br>>>> >deprecated property."
<br>>>> >
<br>>>> >This is not true for any of my object.
<br>>>> >So, how reliable is this table?
<br>>>> >Or maybe it just point out to POSSIBLE/LIKELY problems, without
<br>>>> >actually telling that you are incurring in one of those?
<br>>>> >
<br>>>> >Thank you very much for any clarification.
<br>>>> >Valerio
<br>>>
<br>>>--
<br>>>David Vinson, Ph.D.
<br>>>ESRC Research Fellow
<br>>>Cognitive, Perceptual and Brain Sciences Research Department
<br>>>University College London
<br>>>26 Bedford Way, London WC1H 0AP
<br>>>Tel +44 (0)20 7679 5311 (UCL internal ext. 25311)
<br>
<br></blockquote></div>
<p></p>
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