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Richard Gregory tried once (in his own opinion, not quite successfully)
to classify the illusions (Phil.Trans. R. Soc. Lond. B (1997) 352,
1121-1128; TICS (1997, 1(5) 190-193). It is clear that Müller-Lyer is not
of the same type as the motion after-effect. In fact, what an illusion is
remains an undecided (philosophical?) question (see Michael Morgan,
<i>The space between our ears</i>, Oxford UP, 2003).<br><br>
I do not see how a person who doesn't experience the M-L illusion would
not experience a MAE. Is the latter an "illusion". If yes, then
everything is, so that "not experiencing <i>anything</i>" is to
be blind, deaf, etc.<br><br>
Andrei<br><br>
<br>
At 14:34 13/02/2017, Tom Freeman wrote:<br>
<blockquote type=cite class=cite cite="">As Qaisim says, individual
differences in illusions/perceptual biases have been neglected (as IDs in
perception have in general).<br><br>
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.<br><br>
<a href="http://journals.sagepub.com/doi/full/10.1177/0956797616665351" eudora="autourl">
http://journals.sagepub.com/doi/full/10.1177/0956797616665351</a><br><br>
Cheers Tom<br><br>
--------------------------------------<br>
School of Psychology<br>
Tower Building<br>
Park Place<br>
Cardiff CF10 3AT UK<br>
+44(0)2920874554<br>
psych.cf.ac.uk/contactsandpeople/academics/freeman.html<br><br>
-----Original Message-----<br>
From: visionlist
[<a href="mailto:visionlist-bounces@visionscience.com" eudora="autourl">
mailto:visionlist-bounces@visionscience.com</a>] On Behalf Of Michael
Herzog<br>
Sent: 12 February 2017 17:33<br>
To: Qasim Zaidi <qz@sunyopt.edu>; moorek@arcadia.edu<br>
Cc: visionlist@visionscience.com<br>
Subject: Re: [visionlist] immunity from illusions (particularly visual
illusions)<br><br>
Dear All<br>
We just recently reported that there are few significant correlations
between illusion magnitudes:
<a href="https://www.ncbi.nlm.nih.gov/pubmed/27919676" eudora="autourl">
https://www.ncbi.nlm.nih.gov/pubmed/27919676</a><br>
Thus, maybe just an instantiation of variability......<br>
All the best<br>
Michael<br><br>
Qasim Zaidi wrote:<br>
> There are individual differences, but they have not been much
studied <br>
> until the recent push by Jeremy Willmer at VSS.<br>
><br>
> I had a brilliant undergraduate at Columbia, who went on to be a
star <br>
> grad student at MIT, has done start-ups, been CTO of multiple <br>
> companies, won an Emmy, etc etc, and he had no simultaneous
brightness <br>
> or color induction, as measured by objective methods (nulling on a
<br>
> 2AFC adaptive staircase). He was also a meticulous observer in
motion <br>
> experiments, where he saw all kinds of effects.<br>
><br>
> You may want to see what else is different about these
students. I <br>
> suspect that they will be normal on low level detection and <br>
> discrimination experiments, but that may still be worth
checking.<br>
><br>
> Cheers<br>
> QZ<br>
><br>
> Qasim Zaidi PhD<br>
> SUNY Distinguished Professor<br>
><br>
> Graduate Center for Vision Research,<br>
> State University of New York College of Optometry,<br>
> 33 West 42nd St, New York, NY 10036.<br>
> Office: 212-938-5542; Lab: 212-938-5756; Fax: 212-938-5537<br>
> E-mail: qz@sunyopt.edu
<<a href="mailto:qz@sunyopt.edu" eudora="autourl">
mailto:qz@sunyopt.edu</a>> <br>
>
<a href="http://poseidon.sunyopt.edu/Zaidi/index.php" eudora="autourl">
http://poseidon.sunyopt.edu/Zaidi/index.php</a><br>
><br>
> *"Dr. Katherine Moore" <moorek@arcadia.edu <br>
>
<<a href="mailto:moorek@arcadia.edu" eudora="autourl">
mailto:moorek@arcadia.edu</a>>><br>
> writes:*<br>
> Dear vision experts,<br>
><br>
><br>
> I was hoping some of you could help me out with something that made
me <br>
> curious all of last semester. Last semester was about the fifth time
<br>
> I've taught Sensation & Perception. Even though my classes are
small <br>
> (less than 25 students), each time I teach this course I have a
<br>
> student or two who is unusual in some sensory way -- just one
working <br>
> eye, synesthesia, no sense of smell, blind, prosopagnosia, etc.<br>
><br>
><br>
> This past semester I had two students who did not experience
illusions <br>
> (out of just 10 students!) One of them truly did not experience any
of <br>
> the illusions. Another did not experience the vast majority of them.
<br>
> We mostly did visual illusions, but among the few auditory illusions
<br>
> we did, these students didn't experience them either. I have no
reason <br>
> to think the students were lying about it--they are very sincere
people.<br>
> And they both had trouble with an assignment that required students
to <br>
> view some new illusions, describe what they saw and what was really
<br>
> happening, and explain the illusion. These two students didn't see
<br>
> what the rest of the class saw, and only saw "what was really
happening."<br>
><br>
><br>
> The illusions spanned the course, which is to say they touched upon
<br>
> many different causes. For example, the Hermann grid variations,
<br>
> including the "disappearing dots" one that went viral this
summer/fall <br>
> were affected, as well as the color constancy and size constancy
ones <br>
> like the checkershadow illusion, Ames room, etc.<br>
><br>
><br>
> What do you all know about this, like what the cause could be for
this <br>
> immunity from illusions of many kinds, or individual variation in
the <br>
> experience of illusions?<br>
><br>
><br>
> Best,<br>
> Katherine<br>
><br>
> Katherine S Moore<br>
> Assistant Professor of Psychology<br>
> Arcadia University<br>
> 450 S. Easton Rd<br>
> Glenside, PA 19038<br>
> Office: Boyer Hall room 128<br>
> Phone: (215) 517-2429<br>
>
<a href="https://sites.google.com/a/arcadia.edu/amclab/" eudora="autourl">
https://sites.google.com/a/arcadia.edu/amclab/</a><br>
><br>
><br>
><br>
><br>
><br>
> _______________________________________________<br>
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> visionlist@visionscience.com<br>
>
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<br>
><br><br>
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</blockquote>
<x-sigsep><p></x-sigsep>
Andrei Gorea<br>
<i>Laboratoire Psychologie de la Perception (LPP)</i>, UMR 8242<br>
Université Paris Descartes & CNRS<br>
Biomédicale des Saints Pères<br>
4ème étage, bureau H431h<br>
45 rue des Saints Pères<br>
75006 Paris, Cedex 06<br><br>
Tel. office: (33 1) 4286 4313<br><br>
URL:
<a href="http://andrei.gorea.free.fr/">http://andrei.gorea.free.fr/<br>
</a>
<a href="http://lpp.psycho.univ-paris5.fr/" eudora="autourl">
http://lpp.psycho.univ-paris5.fr/</a> <br><br>
Get to my office:<br>
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