Horizontal Display Line Issue

[Paul Groot]

Are the pre-release times set to 'same as duration'?
And is flipping enabled' set to yes (in the display device properties)?

Paul



On 5 November 2013 00:13, Joanna Lewis <joanna.e.lewis at gmail.com> wrote:

> Hello everyone!
>
> I'm running a flicker paradigm in e-prime that utilizes millisecond timing
> for the alternating displays. One is a screen of black dots on a white
> background (one disappears every other flicker), the other display is gray
> scale full screen noise mask. *When the two flicker, there is a
> horizontal line that appears near the top of the screen*. We have tried
> to account for the screen updating cycles, but I can't seem to figure out
> why the issue persists. Here are more specifications.
>
> LED monitor
> Refresh rate: 60 hz
> Display 1: 250 ms
>
> onset sync: vertical blank Offset: None
>
> Display 2: 83 ms
>
> onset sync: vertical blank Offset: None
>
>
> Displays lengths were chosen based on 1000/60=16.667, and 16.667*5 =83.35
> and 16.667*15=250
>
> I'm at a dead end and am asking you if there is something I can do or it's
> not possible at this speed of presentation. Thank you for any ideas
>
> Joanna
>
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