Psychedelic Information Theory
Shamanism in the Age of Reason
Search Results : Illusion
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A grid illusion is any kind of grid that deceives a person's vision. The two most common types of grid illusions are Hermann grid illusion and the Scintillating grid illusion. The Hermann grid illusion is an optical illusion reported by Ludimar He...
... effect, stroboscopic effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly than the true rotation, it can appear stationary, or it can appear to ...
... motions into jerky snapshots, and wagon-wheel illusions where rotating spokes appear to stop or spin backwards.11,12,13 [fig]5;1[/fig]In addition to retaining visual information, perceptual frames hold the totality of multi-modal sensory render...
The peripheral drift illusion (PDI) refers to a motion illusion generated by the presentation of a sawtooth luminance grating in the visual periphery. This illusion was first described by Faubert and Herbert (1999), although a similar effect called t...
A Motion Illusion Reveals Mechanisms of Perceptual Stabilization
Visual illusions are valuable tools for the scientific examination of the mechanisms underlying perception. In the peripheral drift illusion special drift patterns appear to move although they are static. During fixation small involuntary eye movemen...
--> Content on this page requires a newer version of Adobe Flash Player. --> What to observe When this page has loaded, the neighboring demo is in “auto run” mode: the wheel rotation smoothly varies between standing still and a ...
Why are Psychedelics Spiritual?
... as ego death is a means of escaping the illusion of self, timelessness is a means of escaping the forward march of time. On psychedelics time may appear to slow or stop or even move backwards; or more often time is perceived as an illusion ...
Does time dilate during a threatening situation?
... stimulus is referred to as the time dilation illusion, and three possible, but not mutually exclusive, explanations for why it might occur have been put forward. First, the stimulus might be perceived as lasting longer because it has unusual pro...
... the generation of this “continuous Wagon Wheel illusion” (c-WWI). Consistent with our hypothesis, we found that the illusion was effectively weakened following disruption of right, but not left, parietal regions by low frequency repetitive trans...
The Phase of Ongoing EEG Oscillations Predicts Visual Perception
Oscillations are ubiquitous in electrical recordings of brain activity. While the amplitude of ongoing oscillatory activity is known to correlate with various aspects of perception, the influence of oscillatory phase on perception remains unknown. In...
The continuous Wagon Wheel Illusion is object-based
... stimulus (the “continuous Wagon Wheel illusion”) has been taken as evidence that some aspects of motion perception rely on discrete sampling of visual information. The spatial extent of this sampling is currently under debate. When ...
Pinna illusion is the first visual illusion showing a rotating motion effect. In Figure 1 the squares, delineated by two white and two black edges each, are grouped by proximity in two concentric rings. All the squares have the same width, length, an...
Timewarp: How your brain creates the fourth dimension
... with studies of the well-known "wagon wheel illusion", in which the wheels of a forward-moving vehicle appear to slow down or even roll backwards. The illusion was first noted during the playback of old films, and it's due to the fact that the ...
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