Geometrical illusions are known through a small core of classical illusions that were
discovered in the second half of the nineteenth century. Most experimental studies and most …

Geometrical visual illusions are an intriguing phenomenon, in which subjective perception
consistently misjudges the objective, physical properties of the visual stimulus. Prominent …

In the Poggendorff illusion, two colinear segments abutting obliquely on an intervening
configuration (often consisting of two long parallel lines) appear misaligned. We report here …

The Poggendorff illusion was approached with a novel perspective, that of applying
Emmert's Law to the situation. The extensities between the verticals and the transversals …

In humans, geometrical illusions are thought to reflect mechanisms that are usually helpful
for seeing the world in a predictable manner. These mechanisms deceive us given the right …

Studies of the Poggendorff illusion (a transversal interrupted by parallel lines) showed that
illusory effects increased linearly with increasing separation between the parallels …

Differences between the geometrical properties of simple configurations and their visual
percept are called geometrical–optical illusions. They can be differentiated from illusions in …

Perception of geometric illusions is a visuo-spatial process. As such processes often have
been found to be predominantly the domain of the right hemisphere, this hemisphere may …

It has been argued that humans' susceptibility to visual illusions does not simply reflect
cognitive flaws but rather specific functional adaptations of our perceptual system. The data …

What is an “illusion”? I would like to argue that (A) there is no coherent and meaningful
definition of the word “illusion” and (B) the majority of the things we have previously labelled …