stimulus size in degrees of visual angle

[john@johnallen.it]

Hi
If u want to use eprime then, AFAIK, you will need to do some basic
trigonometry to convert angles into mm and then into pixels.
You might like to look at PsychoPy instead though. It has the concept of
monitor dimensions and viewing angles builtin so this may be a lot simpler.
Its free too :) and works across all platforms too.
John
On 17 Oct 2013 14:26, "Maggie" <mengyinj at gmail.com> wrote:

> Hello,
>
> I'm just starting to learn how to use eprime and I've run into some
> trouble with the stimulus size. I need to place a geometric shape (i.e.
> triangle or square) above the fixation point, and it needs to be 3.8*°* x
> 3.8*° *in size. How to I convert this into pixels exactly? I'm assuming
> the size (height and width) in properties are in pixels too, right?
>
> Many thanks,
> Maggie
>
>
>
>
>
>
>
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