The Mystery of The Moon Illusion

Ross, Helen E.; Plug, Cornelis

doi:10.1093/acprof:oso/9780198508625.001.0001

Cited by 66 publications

(40 citation statements)

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“…Their finding was interpreted as evidence for two levels of awareness regarding perceived distance, which they contended are held separately in two streams of visual pathways, consistent with the two visual systems theory championed by Goodale (1995, 2008; see also Goodale & Milner, 1992). These findings are controversial (Ross & Plug, 2002). More important, the phenomenal aspect of the paradoxical distance effect remains unaccounted for.…”

supporting

confidence: 56%

“…KIM 1962) 4 and variants of the oculomotor theory (Enright, 1989;McCready, 1985McCready, , 1986Roscoe, 1989; see Ross & Plug, 2002, for a review). The apparent distance theory postulates a two-stage process of distance perception involving the unconscious registration of distance information followed by a conscious judgment of distance.…”

mentioning

confidence: 99%

“…Specifically, a stimulus with a constant visual angle appears both smaller and farther away with increase in convergence but larger and closer with relaxation in convergence, both in violation of the SDIH. The former is referred to as convergence micropsia, whereas the latter is referred to as macropsia (Ross & Plug, 2002). 5 With changes in vergence state, perceived distance is altered.…”

mentioning

confidence: 99%

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Oculomotor Effects in the Size-Distance Paradox and the Moon Illusion

Kim

2012

Ecological Psychology

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Drawing on 2 concepts-the resting position of the eyes and a binocular geometry for perceived size, the moon illusion is explained as the consequence of different oculomotor adjustments caused by change in the direction of gaze contingent upon the viewing conditions of the moon. Hence, each particular moon will be viewed with a different vergence state which, in turn, yields a different amount of binocular disparity. The vergence state will determine the perceived size of an object whereas disparity will determine its perceived distance. It is further contended that the perceived size of the moon is based on a new binocular information source for size perception enabling the size of an object to be perceived even in the absence of egocentric distance information. Discussion focuses on the paradoxical aspect of the moon illusion and how the size-distance invariance hypothesis may have contributed to its effect.People observing the moon commonly report that it appears larger and closer when it is near the horizon than when it is higher in the sky. This phenomenon arises despite the fact that the moon itself remains constant revolving around the earth at a distance of about 245,000 miles 1 with a fixed diameter of 2,200 1 Because the moon orbits the earth along an elliptical path, its distance from the earth changes, depending on its location in the orbit, from 363,104 km (225,622 miles) at its minimum to 405,696 km (252,088 miles) at its maximum. On average, the distance from the center of the earth to the center of the moon is approximately 384,403 km (238,857 miles).

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supporting

confidence: 56%

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confidence: 99%

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confidence: 99%

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Oculomotor Effects in the Size-Distance Paradox and the Moon Illusion

Kim

2012

Ecological Psychology

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“…Consider one's experience when subject to the moon illusion: there is a significant difference with respect to phenomenal size when the moon is seen near the horizon and when it is viewed higher in the sky. This is only possible because environmental factors other than visual angle play a causal role in determining phenomenal size when one looks at the moon (see, for example, Ross and Plug 2002). Since it would be implausible to assume that such environmental factors have a causal influence over phenomenal size only when one looks at the moon, it's reasonable to think that these factors will commonly or normally play a role in determining phenomenal size when viewing any given object.…”

Section: The Visual Angle Replymentioning

confidence: 99%

Peacocke’s trees

Millar

2009

Synthese

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In Sense and Content, Christopher Peacocke points out that two equallysized trees at different distances from the perceiver are normally represented to be the same size, despite the fact that in a certain sense the nearer tree looks bigger; he concludes on the basis of this observation that visual experiences possess irreducibly phenomenal properties. This argument has received the most attention of all of Peacocke's arguments for separatism-the view that the intentional and phenomenal properties of experiences are independent of one another. However, despite its notoriety, the argument is widely misunderstood and underappreciated. I argue that once the structure of the argument is clarified and the replies that have been offered are considered closely, one must conclude that the trees argument is successful.

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“…The main idea of Al Haytham was that refraction cannot explain the 'moon illusion'. He tried to give a psychological explanation of this phenomenon, which Ross and Plug (2002) call 'the flattened dome theory' Figure 17). According to this theory the size of an object is judged by combining its visual angle with its known distance.…”

Section: Al Haytham's Theory About the Influence Of Atmospheric Reframentioning

confidence: 99%

Developing Ideas of Refraction, Lenses and Rainbow Through the Use of Historical Resources

Mihas

2006

Sci & Educ

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The paper examines different ways of using historical resources in teaching refraction related subjects. Experimental procedures can be taught by using Ptolemy's and Al Haytham's methods. The student can check the validity of the approximations or rules which were presented by different people. The interpretation of the relations is another subject. Refraction phenomena were interpreted either by the principle of least time or by particles or by waves. The law of refraction can be used as an example of a law which was discovered but put aside. The use of the law to construct lenses can be seen in Ibn Sahl's hyperbolical lenses. Al Farisi's method of ''cones'' is used for the interpretation of the rainbow. Al Farisi's model was discovered again by Descartes. These models were not able to explain the supernumerary arcs. For this reason a simple wave model is presented. The models proposed by Al Haytham of atmospheric refraction can be used to show that refraction actually cannot be considered as the cause of the change of the size of the moon. Finally Huygens model of refraction in the atmosphere is used to introduce the wave fronts as more fundamental than rays.

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The Mystery of The Moon Illusion

Cited by 66 publications

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Oculomotor Effects in the Size-Distance Paradox and the Moon Illusion

Oculomotor Effects in the Size-Distance Paradox and the Moon Illusion

Peacocke’s trees

Developing Ideas of Refraction, Lenses and Rainbow Through the Use of Historical Resources

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