Wallpaper illusion: cause of disorientation and falls on escalators.
نویسندگان
چکیده
The wallpaper illusion, first described over a century ago, can occur when a person with normal binocular vision views a pattern that is periodic in the horizontal meridian of the visual field. Escalator trends present such a pattern. Evidence is presented favoring the view that disorientation experienced by escalator riders is caused by this illusion. Possibly some of the estimated 60,000 escalator falls occurring in the United States each year are linked to it.
منابع مشابه
The role of vergence in the perception of distance: a fair test of Bishop Berkeley's claim.
Binocular eye movements were measured while subjects perceived the wallpaper illusion in order to test the claim made by Bishop Berkeley in 1709 that we perceive the distance of nearby objects by evaluating the vergence angles of our eyes. Four subjects looked through a nearby fronto-parallel array of vertical rods (28-35 cm away) as they binocularly fixated a point about 1 meter away. The wall...
متن کاملFixating on the wallpaper illusion: a commentary on 'The role of vergence in the perception of distance: a fair test of Bishop Berkeley's claim' by Logvinenko et al. (2001).
Is vergence state a reliable cue to absolute distance? The answer to this seemingly simple question has been the subject of a long-standing and controversial debate in the vision literature. It is somewhat sobering, but perhaps also an indication of the complexity of the problem, that vision researchers have not been able to communicate effectively with one another in order to answer de nitive...
متن کاملThe wallpaper illusion explained.
In the wallpaper illusion, a repetitive pattern appears to shift from one depth plane to the plane nearest fixation. We measured the timing of this shift for a 6 degrees wide, 3-cpd sinusoidal grating presented in a rectangular envelope; the edges (envelope) of the grating were presented at 20 arcmin of disparity (one period) behind the fixation plane. We asked observers to signal when the segm...
متن کاملCharacteristics of Falls Among Institutionalized Elderly People
Objectives: Falls by elderly people area frequent cause of morbidity and mortality, especially in institutionalized elders. to describe the features of falls among institutionalized elderly people. Methods & Materials: characteristics of falls in the preceding six months (March 2006 - September 2006) that occurred among elder lies (aged over 60years) with normal physical function and cogniti...
متن کاملThe Tax and Petroleum Revenue Effect on Iran’s Public Expenditures (1994–2015), Employing Fiscal Illusion Approach
I ncreased expenditures and the government size is an important issue in public sector economics. In this regard, various theories have been developed in order to justify the reasons for the public expenditure growth, and the theories have been empirically tested. One of the outlooks explaining the government expenditures growth and the economy size, is fiscal illusion approach. According ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Perception
دوره 19 5 شماره
صفحات -
تاریخ انتشار 1990