A Note on the Horizontal--Vertical Illusion - A Reply to Wade (2014).

The Sanger Centre

Orientation is a dimension much studied in visual neuroscience. Many single cells in the visual cortex respond to lines or edges in specific orientations, and in monkey cortex these cells are specific for lines within ±20° of the preferred orientation. One class of illusion, involving perception of orientation, can direct us towards interpretations of neural function (in this series, referred t...

Illusions as neuro-signs

Orientation is a dimension much studied in visual neuroscience. Many single cells in the visual cortex respond to lines or edges in specific orientations, and in monkey cortex these cells are specific for lines within ±20° of the preferred orientation. One class of illusion, involving perception of orientation, can direct us towards interpretations of neural function (in this series, referred t...

Author’s Reply to “A Note on the Simulation of Gas Diffusion in Capillaries and Porous Solids”

Eye-Tracking Reveals that the Strength of the Vertical-Horizontal Illusion Increases as the Retinal Image Becomes More Stable with Fixation

The closer a line extends toward a surrounding frame, the longer it appears. This is known as a framing effect. Over 70 years ago, Teodor Künnapas demonstrated that the shape of the visual field itself can act as a frame to influence the perceived length of lines in the vertical-horizontal illusion. This illusion is typically created by having a vertical line rise from the center of a horizonta...

Author’s Reply to “A Note on the Simulation of Gas Diffusion in Capillaries and Porous Solids”