Dear vision scientists out there!
I am doing my PhD on dyslexia and would like to add some visual measures to other standard tasks for the children I’m testing. I am quite new to the field of vision therefore I would like to ask for some help.
I have the Psykinematix software and a MacBook and would like to measure magnocellular functions (which are sometimes compromised in dyslexics) using frequency doubling illusion. I am seeking any pieces of advice on how to do that (how to create stimuli, what to manipulate: frequency or contrast?) and whether stimuli using this software would be good enough (I see that most studies use sophisticated equipment)? Also, if anyone has a better idea for task/stimuli than frequency doubling that would tap into magno processing I would be delighted to hear from you! Any thoughts or ideas regarding the technical side as well as the theoretical will be very much appreciated!
I think you can run the experiment with your hardware and software, but if you need >60 hz maybe you will need a second display
Is informal but you can try this for exploring: http://www.michaelbach.de/ot/mot-freqDoubling/index.html
Just in case: https://sites.google.com/a/nyu.edu/expo/ Expo is frequently reported in this Frequency Doubling experiments
Some technical details. http://www.sciencedirect.com/science/article/pii/S0042698907001034
All the best,
Dear Julio,
Thank you so much for these! This is very helpful!
Best wishes,
Dear Barbara,
According to many single-cell study reviews, the parvocellular system cannot process contrasts below 10% Michelson contrast. So a way to stimulate the magnocellular system selectively seems to me to be using b/w patterns at low contrast. We have put that forward in two publications back in the 90s:
www.hans.strasburger.de/reprints/strasburger_rentschler_ejn_1996.pdf
www.hans.strasburger.de/reprints/strasburger_rentschler_harvey_ejn_1994.pdf
Greetings to Edinburgh,
Hans
Thank you so much for your help and the links, Hans!
Greetings to Munich!
Barbara
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