[solved] incorrect timing of last sketchpad in a loop

Comments

• ezerkar

  January 2012 edited January 2012

  FYI,
  I've checked on a different win xp computer and there is no problem, I would still like to know if anybody has any ideas but keep in mind it's a computer specific problem.
• sebastiaan

  January 2012 edited 4:21PM

  Hi Ezerkar,

  Glad to hear that you worked it out, but I'll nevertheless take a look at it to see what's going on.

  Thanks for reporting this!

  Regards,
  Sebastiaan

  
  
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• ezerkar

  January 2012 edited 4:21PM

  Thanks,

  Ezer
• sebastiaan

  January 2012 edited 4:21PM

  Right, I see. The reason why the timing was a bit off is that each sequence is prepared in advance. But an entire loop (ie., multiple sequences) is not prepared in advance. Therefore, at the end of a sequence there may be a small delay while the next sequence is being prepared. This delay varies, depending on the speed of the computer, the back-end, and the complexity of the stimuli that need to be generated.

  In other words, OpenSesame tries to optimize timing within a sequence, but not across sequences. Does this make sense?

  
  
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• ezerkar

  January 2012 edited 4:21PM

  Yes, this makes a lot of sense. If I understand correctly, I could place a blnk sketchpad at the end of every loop and this will be the only thing chnged when running on diffrent computers.

  Thanks
  Ezer
• sebastiaan

  January 2012 edited 4:21PM

  Yes, exactly! That's what I usually do as well.

  
  
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