Flickering '+' fixation

[Paul Groot]

Hi,

Normally I would advise to simply use another list-object for creating a
repeating (flickering) slide object. But if timing is critical, and you
would only like to redraw/clear a single subobject on the slide, you could
go ahead with the for loop. However, keep in mind you have to sync with the
refresh rate of the display if you update the screen contents (by using
Display.WaitForVerticalBlank). When the loop should be terminated by a
keyboard response, you should use the InputMaskManager.IsPending  function
and a while loop. The fixation object can be referenced as a subobject of
the Slide state (Slide.States('...').Objects('...')) The EBasic manual
contains examples for this...

cheers
Paul


On 17 April 2013 16:10, maayan kedar <kmaayane at gmail.com> wrote:

> Hello,****
>
> ** **
>
> ** **
>
> I am having hard time to understand how I can create a slide which
> contains flickering '+' fixation.****
>
> I looked up here and sow explanations about crating few items flickering
> on different time but am not got to create only one!****
>
> ** **
>
> I used the online help and tried this:****
>
> ** **
>
> Slide. Draw****
>
> ** **
>
> Sleep 200****
>
> ** **
>
> Slide. Clear****
>
> ** **
>
> and so on, but no matter how much I repeated these draw and clear it
> always stop after 3 times!****
>
> ** **
>
> I also tried to create loop but it didn't go well /:****
>
> ** **
>
> ** **
>
> Another problem is that I need only the fixation to flash and not other
> items, and to stop when the participant presses the keyboard for correct
> answer.****
>
> ** **
>
> I whold appreciate very much your help to explain how to put the fixation
> to flash with or without loop?****
>
> ** **
>
> Thank you very much in advance****
>
> ** **
>
> Maayan****
>
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