Horizontal Display Line Issue

[Joanna Lewis]

Paul

Our pre-release was at 33 ms, but the issue was flipping was not enabled. 
That solved it, thank you!!

Additional issue: Has anyone has run into the issue with the flicker 
paradigm occasionally not registering a keystroke response and continuing 
with the loop (sometimes take multiple response to register and quit the 
loop) and if so, how did you fix it?

Joanna


On Tuesday, November 5, 2013 10:41:15 AM UTC-5, Paul Groot wrote:
>
>
> 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.... at gmail.com <javascript:>
> > 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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