Angular Size Illusion and Area V1
The Murray, et al. observers viewed a flat picture with two disks that subtended the same visual angle and formed retinal images of the same size, but the perceived angular size of one was about 17% larger than for the other, due to differences in the background patterns for the disks.
The major discovery was that the sizes of the area V1 activity patterns related to the disks were unequal, despite the fact that the retinal images were the same size. This size difference in area V1 correlated almost perfectly with the 17% illusory difference between the perceived visual angles.
These new findings are crucial for theories of visual space perception and especially any visual angle illusion.
Read more about this topic: Visual Angle
Famous quotes containing the words size, illusion and/or area:
“There are obvious places in which government can narrow the chasm between haves and have-nots. One is the public schools, which have been seen as the great leveler, the authentic melting pot. That, today, is nonsense. In his scathing study of the nation’s public school system entitled “Savage Inequalities,” Jonathan Kozol made manifest the truth: that we have a system that discriminates against the poor in everything from class size to curriculum.”
—Anna Quindlen (b. 1952)
“We’re born alone, we live alone, we die alone. Only through our love and friendship can we create the illusion for the moment that we’re not alone.”
—Orson Welles (1915–1984)
“Whether we regard the Women’s Liberation movement as a serious threat, a passing convulsion, or a fashionable idiocy, it is a movement that mounts an attack on practically everything that women value today and introduces the language and sentiments of political confrontation into the area of personal relationships.”
—Arianna Stassinopoulos (b. 1950)