[visionegg] Re: visual attention task


On Mar 16, 2005, at 12:45 PM, Darren Weber wrote:

Can I get some feedback on this?  I would like to use the visionegg,
but the documentation is sparse and there has been no reply to my
posting on this list for several days.

The Library reference and the demos are the most useful ways to figure out how to do what you'd like to do.

http://www.visionegg.org/reference/index.html

On Fri, 11 Mar 2005 15:40:18 -0800, Darren Weber
<darrenleeweber@xxxxxxxxx> wrote:

Hi,

I'm a visionegg newby.

Please find attached a work in progress.  It will present a sequence
of stimuli for a visual attention task.  However, I do not understand
how to specify different stimulus durations for different stimuli in
the sequence.

This is confusing. Do you want images to randomly be different durations? Or individual images have a duration assigned?
Consider writing a function to select the duration of your image, and using it in put_image.

Also, I want to offset the location of the stimuli to
the left and right of the visual field - how do I do that?

This was also confusing. Do you mean you have two different locations a picture can appear in? Or do you want two pictures simultaneously? For the former, you can change the location of your TextureStimulus object stimulus by setting stimulus.parameters.position. For the latter, you'll want to make two TextureStimulus objects, and place them in the viewport:
viewport = Viewport(screen=screen, stimuli=[stimulus0,stimulus1])

Mark

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