FILE://ARCHIVE
Community-documented anomalies. Entertainment categories, not verified science.
Curated archive entry based on published research. Two stationary lights flashed in nearby positions in rapid sequence can be perceived as a single light moving between them. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A rotating wheel can appear to turn backward in film or stroboscopic displays, and reversal-like percepts have also been reported under continuous light. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A single dim light viewed in a completely dark room can appear to move randomly even though it remains stationary. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. Some repeating light-dark patterns appear to drift when viewed in peripheral vision, especially as the eyes move across them. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. Repeated asymmetric luminance patterns can create a strong impression of rotation in a stationary image; eye movements help trigger the percept. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A rotating two-dimensional outline can be perceived as a three-dimensional object turning in space, despite the display lacking a unique depth solution. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. When each eye is shown a different image, conscious perception can alternate between the two rather than combining them into one stable picture. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A brief afterimage can remain after a person looks away from a high-contrast or colored stimulus, even though the original stimulus is gone. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A stationary, visible target can temporarily disappear from perception while a surrounding pattern moves. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. With steady fixation, an unchanging object in peripheral vision can fade from awareness, especially against a uniform background. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. When a moving object and a brief flash are physically aligned, the moving object is often perceived farther along its path than the flash. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. After prolonged viewing of movement in one direction, a stationary scene can appear to drift in the opposite direction. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A specially distorted room viewed from one position can make people at opposite corners appear dramatically different in size. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A concave face mask is often perceived as a normal, outward-facing face, even when viewers know the mask is hollow. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. The same photograph has led viewers to report blue-and-black or white-and-gold, with studies linking the difference to how observers infer illumination and surface color. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. Two checker squares with equal measured luminance can appear different in lightness when one is interpreted as being in shadow. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. When two objects have equal physical weight, the smaller one often feels heavier after being lifted. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. The drawn bars appear to join into a continuous triangular object, although their depth relations cannot all hold in a single three-dimensional object. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A single line drawing can alternate between a duck-facing view and a rabbit-facing view as the same features are interpreted differently. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A shared outline can be perceived as either a central vase or two facing profiles; attention to one figure makes the other recede. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. The same wireframe cube can switch spontaneously between two interpretations of which face is in front. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. Four disk-shaped inducers can create a subjective square that appears brighter than the background and in front of the inducers. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. Three appropriately oriented disk fragments can make viewers perceive a bright triangle and its contour even though no triangle edge is drawn. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A central grating can appear lower in contrast when surrounded by a high-contrast annulus than an otherwise identical grating without that surround. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. Opposing luminance gradients at a narrow boundary can make adjoining uniform regions appear to have different brightness even when their interiors match. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. An identical gray patch tends to look lighter on a dark surround and darker on a light surround, despite equal target luminance. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. Identical gray patches embedded in alternating dark and light bars can appear to have different lightness depending on which bar they occupy. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. A grid of pale lines on a dark background can produce illusory gray smudges at peripheral intersections; the spots fade when directly fixated. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. At a boundary between adjacent gray levels, observers can perceive extra bright and dark bands that are not present in the luminance profile. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
Curated archive entry based on published research. Rows of offset dark and light tiles can make the horizontal mortar lines between them appear tilted, though they are parallel. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.
