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also can not account for the fact that the
Hermann grid illusion is perceived over a range of bar widths. Lateral inhibition theory would predict that decreasing the size of the grid (and therefore decreasing the amount of inhibition at the intersection) would eradicate the illusory effect. One alternative explanation is that the illusion is due to S1 type
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It is constructed by superimposing white discs on the intersections of orthogonal gray bars on a black background. Dark dots seem to appear and disappear rapidly at random intersections, hence the label "scintillating". When a person keeps their eyes directly on a single intersection, the dark dot
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There is strong evidence that the retinal ganglion cell theory is untenable. For example, making the lines of the grid wavy rather than straight eliminates both the
Hermann grid and scintillating grid illusions. The Baumgartner / RGC theory does not predict this outcome. Lateral inhibition theory
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The difference between the
Scintillating Grid Illusion and the Hermann Grid Illusion is that the former has dots already in place at the intersections, which is not the case for the latter. Since, at first sight, the graphs appear similar, the two illusions are occasionally confused. But the
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evenly spaced intersections with superimposed discs are required to produce the effect. This requirement suggests the participation of global processes of the kind proposed for the linking and grouping of features in an image, in addition to local processes.
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in 1870. The illusion is characterized by "ghostlike" grey blobs perceived at the intersections of a white (or light-colored) grid on a black background. The grey blobs disappear when looking directly at an intersection.
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the ganglion cell. Thus, since a point at an intersection is surrounded by more areas of intensity than a point at the middle of a line, the intersection appears darker due to the increased inhibition.
152:; the area in physical space to which the photoreceptors respond is the ganglion cell's "receptive field". In the center of a so-called on-center receptive field, the individual photoreceptors
99:, discovered by E. and B. Lingelbach and M. Schrauf in 1994. It is often considered a variation of the Hermann grid illusion but possesses different properties.
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Bach, Michael (2008). "Die
Hermann-Gitter-Täuschung: Lehrbucherklärung widerlegt (The Hermann grid illusion: the classic textbook interpretation is obsolete)".
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scintillating illusion does not occur with an isolated intersection, as is the case for the
Hermann grid; observations suggest that a minimum of
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Baumgartner G (1960). "Indirekte Größenbestimmung der rezeptiven Felder der Retina beim
Menschen mittels der Hermannschen Gittertäuschung".
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Schrauf, M.; Lingelbach, B.; Lingelbach, E.; Wist, E. R. (1995). "The
Hermann Grid and the scintillation effect".
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Geier J, Bernáth L, Hudák M, Séra L (2008). "Straightness as the main factor of the
Hermann grid illusion".
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133:, but the result of a group of receptors which respond to the presentation of stimuli in what is called a
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Lingelbach B, Block B, Hatzky B, Reisinger E (1985). "The
Hermann grid illusion–retinal or cortical?".
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An example of the scintillating grid illusion. Dark dots seem to appear and disappear at intersections.
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the ganglion cell when they detect increased luminance; the photoreceptors in the surrounding area
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Geier J, Bernáth L (2004). "Stopping the
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does not appear. The dark dots disappear if one is too close to or too far from the image.
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129:. The intensity at a point in the visual system is not simply the result of a single
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that deceives a person's vision. The two most common types of grid illusions are the
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The effect of both optical illusions is often explained by a neural process called
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An example of the Hermann grid illusion. Dark blobs appear at the intersections
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Differences between the scintillating and Hermann grid illusions
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Dynamic transitions of blind spots in the Hermann grid illusion
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Refutation of classical explanation of Hermann Grid Illusion
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Hermann L (1870). "Eine Erscheinung simultanen Contrastes".
543:"Stopping the Hermann grid illusion by sine distortion"
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440:Schiller, Peter H.; Carvey, Christina E. (2005).
266:Schrauf, M.; Lingelbach, B.; Wist, E. R. (1997).
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27:Kind of grid that deceives a person's vision
358:PflĂĽgers Archiv fĂĽr die gesamte Physiologie
215:PflĂĽgers Archiv fĂĽr die gesamte Physiologie
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307:Alexander, D.M.; Van Leeuwen, C. (2010).
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414:. Malden Ma: Blackwell. pp. 33–53.
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600:Scintillating Grid Illusion – Mathworld
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442:"The Hermann grid illusion revisited"
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268:"The Scintillating Grid Illusion"
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285:10.1016/S0042-6989(96)00255-6
144:pools the inputs of several
617:Large Hermann Grid Illusion
93:scintillating grid illusion
79:Scintillating grid illusion
52:scintillating grid illusion
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570:10.1007/s00347-008-1845-5
325:10.1007/s11571-009-9098-9
938:Ascending and Descending
313:Cognitive Neurodynamics
169:in the visual cortex.
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541:Geier, János (2008).
255:. 24 Suppl. A: 88–89.
142:retinal ganglion cell
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64:Hermann grid illusion
58:Hermann grid illusion
48:Hermann grid illusion
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18:Hermann grid illusion
972:Accidental viewpoint
148:over an area of the
877:Vertical–horizontal
977:Auditory illusions
772:Impossible trident
610:2018-05-22 at the
370:10.1007/BF00680926
227:10.1007/BF01855743
189:Lateral inhibition
184:Cornsweet illusion
127:lateral inhibition
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1013:Optical illusions
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992:Temporal illusion
987:Tactile illusions
957:(2015 photograph)
658:Optical illusions
452:(11): 1375–1397.
179:Spatial summation
16:(Redirected from
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857:Schroeder stairs
832:Peripheral drift
827:Penrose triangle
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933:(1864 book)
837:Poggendorff
812:Oppel-Kundt
807:Necker cube
802:MĂĽller-Lyer
777:Irradiation
319:(1): 1–24.
930:Spectropia
847:Rubin vase
797:McCollough
792:Mach bands
742:Ehrenstein
737:Ebbinghaus
702:Barberpole
677:Afterimage
605:Giant grid
500:Perception
484:2011-10-03
446:Perception
421:0631224211
412:Perception
393:Perception
253:Perception
200:References
194:Mach bands
982:Illusions
954:The dress
946:Waterfall
747:Flash lag
727:Cornsweet
712:Café wall
692:Ames room
670:Illusions
364:: 21–22.
221:: 13–15.
1007:Category
732:Delboeuf
682:Ambigram
608:Archived
578:18830602
528:21028439
520:18605141
474:15740144
466:16355743
399:(1): A7.
378:45209673
343:19898958
235:41109941
173:See also
131:receptor
121:Theories
50:and the
965:Related
892:Zöllner
882:White's
817:Orbison
782:Jastrow
334:2837531
294:9196721
158:inhibit
917:Op art
872:Ternus
852:Sander
767:Hering
707:Bezold
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154:excite
150:retina
95:is an
66:is an
887:Wundt
842:Ponzo
722:Chubb
524:S2CID
470:S2CID
374:S2CID
231:S2CID
114:3 Ă— 3
762:Grid
662:list
574:PMID
516:PMID
462:PMID
416:ISBN
339:PMID
290:PMID
91:The
62:The
44:grid
566:doi
562:106
508:doi
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366:doi
362:272
329:PMC
321:doi
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