Talk:Müller-Lyer illusion

Muller-lyer illusion article
The following quote is from the duplicate article:

"A Muller-Lyer Illusion is an illusion consisting of two lines in which one of these lines has an arrow turning toward the periphery, while the other has lines turning toward the center. This illusion can be explained by the Perspective Constancy theory, which states that certain stimuli features, like the arrowheadsof the figure, are indicators of apparent distance, thus providing false cues. As a result, size constancy is inappropriately induced to compensate for apparent distance of the two parallel line segments."

--Janarius 16:40, 3 March 2006 (UTC)

Judd Illusion
There seems to be confusion in this article in the relationship between the Müller-Lyer illusion and the Judd illusion. I recommend creating a new article for the Judd illusion and making the relevant changes here. The Judd illusion seems to be when the arrow heads are pointing in the same direction (on a single line):

http://www.cut-the-knot.org/Curriculum/Geometry/JuddIllusion.shtml —Preceding unsigned comment added by 128.189.171.213 (talk) 06:36, 16 November 2007 (UTC)

are these the best figures?
I'm wondering if perhaps there are better figures to illustrate the illusion, as the current ones don't seem deceptive at all (at least no to me) and I don't live in a round thatches hut or anything... 65.183.135.231 (talk) 17:27, 20 November 2008 (UTC)

same here 78.82.140.23 (talk) 13:26, 22 September 2009 (UTC)
 * I would say that yes, these are the best figures. its possible 11 yrs ago we had something else up but the Mueller-Lyer illusion is a very simple one, so there's not much variation in how to portray it other than maybe the length of the arrowheads. I'd say that some people are more immune to it than others, and that that's just part of normal human variation. — Soap — 21:24, 15 November 2019 (UTC)

description of the "variation"
"Another variation consists of three arrow-like figures, two with three ends pointing in, and the other with both ends pointing out. When asked to judge the lengths of the two lines"

does this make sense? i'm guessing it refers to, but the description is very unclear to me. k kisses 16:04, 29 May 2010 (UTC)

carpenteredness vs eye pigmentation
"These conclusions were challenged in later work by Gustav Jahoda, who tested members of an African tribe living in a traditional rural environment vs. members of same group living in African cities. Here, no significant difference in susceptibility to the M-L illusion was found. Subsequent work by Jahoda suggested that retinal pigmentation may have a role in the differing perceptions on this illusion,[4] and this was verified later by Pollack (1970). It is believed now that not "carpenteredness", but the density of pigmentation in the eye is related to susceptibility to the M-L illusion. Dark-skinned people often have denser eye pigmentation.[5]" (Carpenteredness) — Preceding unsigned comment added by 80.212.55.17 (talk) 14:13, 17 November 2012 (UTC)

Carpenteredness merge
It should be a section here. It repeats a lot of material and doesn't discuss any other topic besides the Müller-Lyer illusion. 188.26.163.111 (talk) 23:09, 30 January 2013 (UTC)
 * Good point. The Carpenteredness article just seems to be about one possible explanation for the M-L illusion. Haven't time to do the merge right now. MartinPoulter (talk) 11:49, 1 February 2013 (UTC)

Sarcone's dynamic visual representation
Although the star seems to be pulsating, I'm not really convinced that the effect is due to the Mueller-Lyer illusion. The illusion may have a slight effect, or it may simply be reinforced by the more dominant change in the area delimited by the arrow heads. The change in the area is not an illusion, it is a real effect, at least in the center of the image. For the extremities the area is only partially delimited / hinted by the visual cues coming from the arrow heads orientations. In other words, although neat, I wouldn't put the animation as an illustration of the Mueller-Lyer illusion. 95.76.220.229 (talk) 07:03, 13 April 2018 (UTC) Apass

reversed mueller-lyer
we refer to a "reversed" Mueller-Lyer with no expalnation of what it is. it seems to be this: https://www.ncbi.nlm.nih.gov/pubmed/1488264 — Soap — 21:22, 15 November 2019 (UTC)

Unclear caption
The caption on the first illustration says, “The set on the bottom shows that all the shafts of the arrows are of the same length”, but I don’t see how it shows anything that the first fails to, and that neither makes the equality obvious. Mike Schiraldi (talk) 14:30, 19 March 2023 (UTC)