timing error

[David McFarlane]

Tobias,

Everything you need to know about critical timing is in Chapter 3 of the 
User's Guide that came with E-Prime.  Go study that now.  Do not pass 
Go, do not collect $200.

-- David McFarlane, Professional Faultfinder


> Hi everyone,
> 
> I am apparently having a timing error. In a procedure I use a slide
> called "target". I display it for 78 ms on a screen with 100 Hz which
> should result in display times of 80 ms. In the result file I find
> "target.OnsetDelay" values of either 2 ms (as wished) or 20 ms.
> "target.DurationError" is 33 ms.
> 
> I used "vertical blank" for "OffsetSync" and "OnsetSync" and 100 ms of
> pre-release time to virtually avoid such errors.
> 
> Another slide beeing displayed before the target (98 ms, same
> settings) does not show this error.
> 
> Does anyone have an idea what this error could result from?
> 
> Thanks a lot,
> Tobias

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