[visionlist] immunity from illusions (particularly visual illusions)

Tom Freeman FreemanT at cardiff.ac.uk
Mon Feb 13 08:34:05 EST 2017


As Qaisim says, individual differences in illusions/perceptual biases have been neglected (as IDs in perception have in general).

Grist to the mill: Georgie Powell and I have just published an account of individual differences in two well-known motion illusions, based on differences in certain features of motion priors, as well as differences in motion sensitivity.

http://journals.sagepub.com/doi/full/10.1177/0956797616665351

Cheers Tom

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-----Original Message-----
From: visionlist [mailto:visionlist-bounces at visionscience.com] On Behalf Of Michael Herzog
Sent: 12 February 2017 17:33
To: Qasim Zaidi <qz at sunyopt.edu>; moorek at arcadia.edu
Cc: visionlist at visionscience.com
Subject: Re: [visionlist] immunity from illusions (particularly visual illusions)

Dear All
We just recently reported that there are few significant correlations between illusion magnitudes: https://www.ncbi.nlm.nih.gov/pubmed/27919676
Thus, maybe just an instantiation of variability......
All the best
Michael

Qasim Zaidi wrote:
> There are individual differences, but they have not been much studied 
> until the recent push by Jeremy Willmer at VSS.
>
> I had a brilliant undergraduate at Columbia, who went on to be a star 
> grad student at MIT, has done start-ups, been CTO of multiple 
> companies, won an Emmy, etc etc, and he had no simultaneous brightness 
> or color induction, as measured by objective methods (nulling on a 
> 2AFC adaptive staircase).  He was also a meticulous observer in motion 
> experiments, where he saw all kinds of effects.
>
> You may want to see what else is different about these students.  I 
> suspect that they will be normal on low level detection and 
> discrimination experiments, but that may still be worth checking.
>
> Cheers
> QZ
>
> Qasim Zaidi PhD
> SUNY Distinguished Professor
>
> Graduate Center for Vision Research,
> State University of New York College of Optometry,
> 33 West 42nd St, New York, NY  10036.
> Office: 212-938-5542; Lab: 212-938-5756; Fax: 212-938-5537
> E-mail: qz at sunyopt.edu <mailto:qz at sunyopt.edu> 
> http://poseidon.sunyopt.edu/Zaidi/index.php
>
> *"Dr. Katherine Moore" <moorek at arcadia.edu 
> <mailto:moorek at arcadia.edu>>
> writes:*
> Dear vision experts,
>
>
> I was hoping some of you could help me out with something that made me 
> curious all of last semester. Last semester was about the fifth time 
> I've taught Sensation & Perception. Even though my classes are small 
> (less than 25 students), each time I teach this course I have a 
> student or two who is unusual in some sensory way -- just one working 
> eye, synesthesia, no sense of smell, blind, prosopagnosia, etc.
>
>
> This past semester I had two students who did not experience illusions 
> (out of just 10 students!) One of them truly did not experience any of 
> the illusions. Another did not experience the vast majority of them. 
> We mostly did visual illusions, but among the few auditory illusions 
> we did, these students didn't experience them either. I have no reason 
> to think the students were lying about it--they are very sincere people.
> And they both had trouble with an assignment that required students to 
> view some new illusions, describe what they saw and what was really 
> happening, and explain the illusion. These two students didn't see 
> what the rest of the class saw, and only saw "what was really happening."
>
>
> The illusions spanned the course, which is to say they touched upon 
> many different causes. For example, the Hermann grid variations, 
> including the "disappearing dots" one that went viral this summer/fall 
> were affected, as well as the color constancy and size constancy ones 
> like the checkershadow illusion, Ames room, etc.
>
>
> What do you all know about this, like what the cause could be for this 
> immunity from illusions of many kinds, or individual variation in the 
> experience of illusions?
>
>
> Best,
> Katherine
>
> Katherine S Moore
> Assistant Professor of Psychology
> Arcadia University
> 450 S. Easton Rd
> Glenside, PA 19038
> Office: Boyer Hall room 128
> Phone: (215) 517-2429
> https://sites.google.com/a/arcadia.edu/amclab/
>
>
>
>
>
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