All Forums  Support Forums  Experimental Control  Timing problem with presentation.

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by ken.roberts[/i] [br]Just writing to let you all know about a problem that I encountered running with Presentation on the 3T last week. In my paradigm, I briefly display images on the screen, each with a duration of 133ms. In analyzing the log files, I noticed that for brief periods, the timing would get really poor-- and that these periods increased in terms of their proportion of the run as time went on. These two images are histograms of the stimuli duration-- the first from two weeks ago, and the second from last week: [img]http://www.duke.edu/~kcr2/biac_forums/earlier_run.png[/img] [img]http://www.duke.edu/~kcr2/biac_forums/later_run.png[/img] I found that the problem could be avoided by rebooting every time before you run. [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.