Image display delay

[David McFarlane]

At 4/5/2009 09:35 PM Sunday, maocong wrote:
>I am a greenhand in programming on e-prime, and I need some help on
>the fellowing issue:
>
>I designed an ERP visual stimulous experiment by using the control of
>ImageDisplay on e-Prime 2.0v and the EEG recording system is NeroScan
>4.3v. And I found a 8~14ms delay on image display(shown by the
>programme running result file), and the help file showed this delay is
>the difference between orignial onset time and actual display time.
>This random image display delay greatly effect the accuracy of N170
>latency recorded, which lead to the unreliablity of the experiment
>result. Therefore I hope you can give me some advices about how to
>eliminate/compensate this display delay or how to uniform this display
>delay

Please read thoroughly chapter 3 ("Critical timing...") of the User's 
Guide that came with E-Prime.

-- David McFarlane, Professional Faultfinder


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