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Advice Req'd from VERP Researchers

Paul Castle psrbi at csv.warwick.ac.uk
Fri Nov 25 11:28:56 EST 1994


Can anyone out there who is investigating Visual Event-Related Potentials,
give me any advice regarding stimulus presentation.

I wish to present subjects with approximately twelve slides/photographic
images. It is not possible to do this with standard slide projectors as the
shutter speed is too slow.

I have (as I understand it) two options:

1) to use a 'specialised' projector with a faster shutter speed, in which
case,
   does anyone know where I can acquire such equipment(or who I can
contact):
   or, 

2) to present computer-generated images, in which case, how do I overcome
the
   fact that the "image-construction time" will probably exceed 300 msec(or
so I
   have been told).

If anyone can shed some light on my dilemma, I would be eternally grateful!



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