Help us get to over 8,748 articles in 2024.

If you know of a magician not listed in MagicPedia, start a New Biography for them. Contact us at magicpediahelp@gmail.com

Difference between revisions of "Boomerang Illusion"

From Magicpedia, the free online encyclopedia for magicians by magicians.
Jump to: navigation, search
m
(Additional info. The linked website is marked by Google as security risk ans was removed.)
Line 1: Line 1:
 
'''The Boomerang Illusion''' (also known as the Jastrow Illusion) is an effect based on an optical illusion in which two boomerang shapes appear to shrink and grow.[[File:JastrowIllusion.png|300|thumb|right|The two figures are identical.]]
 
'''The Boomerang Illusion''' (also known as the Jastrow Illusion) is an effect based on an optical illusion in which two boomerang shapes appear to shrink and grow.[[File:JastrowIllusion.png|300|thumb|right|The two figures are identical.]]
  
The optical illusion is credited to Professor [[Joseph Jastrow]], a pioneering  psychologist, who used it to illustrate optional illusions in 1891.
+
The optical illusion is often credited to Professor [[Joseph Jastrow]], a pioneering  psychologist, who used it to illustrate optional illusions in 1891. The same illusion was published by Felix Müller-Lyer in 1889 and by Wilhelm Wundt a year later. Psychologists often refter to it as the Jastrow-Wundt illusion of size.
  
It's sold as part of many magic kits to children.
+
This illusion has been used by psychologists to investigate how the we perceive size based on visual clues and has also been used as to test whether people with brain damage have a full field of vision. The psychological mechanism that causes this illusion is still a matter of discussion amongst researchers. The Jastrow Illusion has even been tested with chimpanzees to find out how our perception functions.
 
+
== Publications ==
+
* Presented as an optical illusion in [[Simple Conjuring Tricks]] by [[Will Goldston]]  (1913)
+
* A kind of bet in [[200 More Tricks You Can Do]] by [[Howard Thurston]] as ''Which Is Larger?''  (1927)
+
 
+
== Variations of the shape ==
+
* Noses
+
* Bananas
+
* Rainbows
+
* Fish
+
  
 +
Performing the Jastrow Illusion as a magic trick requires a theatrical approach. Only showing the arcs to be swapping relative size will render it a mere puzzle. Many different variations on this theme have been published and marketed over the decades. The trick can be performed with boomerangs, fish, card fans, mud flaps or anything else that resembles an arch. Magic routines using this principle can use two, three or even four arches, adding layers of deception. When using small segments, there are also possibilities to deploy slight of hand for additional trickery.
  
 +
It is often sold as part of many magic kits to children.
  
 
==Bibliography==
 
==Bibliography==
* Dayton, R. (1994). Fish Sticks. M-U-M, 83(September), 30–32.
+
* Bartolomeo, P. (2014). Unilateral Spatial Neglect: Clinical Aspects. In P. Bartolomeo, ''Attention Disorders After Right Brain Damage'' (pp. 49–83). London: Springer London.
* de Courcy, K. (1997). A brief talk on the banana. Linking Ring, 77(1), 91–93.
+
* Bateman, L. (1949). Yo-It-Chi. ''Abracadabra'', 8(183), 214–215.
* Freer, Winston . (n.d.). Boomerang Fish. In Freer’s exclusive mysteries. Miracle Factory.
+
* Braine, M. D. S., & Shanks, B. L. (1965). [http://doi.org/10.1016/S0022-5371(65)80025-1 The development of conservation of size]. ''Journal of Verbal Learning and Verbal Behavior'', 4(3), 227–242.
* Ginn, D. (2010). Baffling boomerangs. Magicana, 57, 10–13.
+
* Brodahl, L. A. (2015). ''Scripted! #1: Professors Nightmare and Fiber Optics Extended''.
* Gower, H. (1962). Magic mudguards. Abracadabra, 33, 4–6.
+
* Carson, R. (1965). Jimmy Lake, President, Fellowship of Ministers Convention. ''Linking Ring'', 45(2), 111.
* Kleefield, J. (2008). Boomerang Teach-In. Linking Ring, 88(5), 84–85.
+
* Dayton, R. (1994). Fish sticks. ''M-U-M'', 83(September), 30–32.
* Pecor, C. J. (2001). The boomerangs revisited. Linking Ring, 81(5), 108–109.
+
* de Courcy, K. (1997). A brief talk on the banana. ''Linking Ring'', 77(1), 91–93.
* Price, D. (2000). Color changing boomerangs. M-U-M, 89(May), 36–38.
+
* Eden, B. (1977). Magic from the “Perception” Perspective. ''Magic Circular'', 71, 63–64.
 +
* Freer, W. (n.d.). Boomerang Fish. In Freer’s exclusive mysteries. ''Miracle Factory''.
 +
* Ginn, D. (2010). Baffling boomerangs. ''Magicana'', 57, 10–13.
 +
* [[Will Goldston | Goldston, W.]] (1918). An Optical Illusion. In [[Simple Conjuring Tricks]] That Anyone Can Perforn (3rd ed.). London: C. Arthur Pearson.
 +
* Gower, H. (1962). Magic mudguards. ''Abracadabra'', 33(833), 4–6.
 +
* Hoy, D. (1957). The Bible and magic. Linking Ring, 37(3).
 +
* Imai, S. (1960). [http://doi.org/10.4992/jjpsy.30.350 Experiments on Jastrow Illusion]. ''The Japanese Journal of Psychology'', 30(5), 350–356.
 +
* Jastrow, J. (1892). [http://doi.org/10.2307/1411617 Studies from the Laboratory of Experimental Psychology of the University of Wisconsin]. II. ''The American Journal of Psychology'', 4(3), 381.
 +
* Kaufman, R. (2016). Genii Speaks. ''Genii'', 79(2), 10–11.
 +
* Kleefield, J. (2008). Boomerang Teach-In. ''Linking Ring'', 88(5), 84–85.
 +
* Maniatis, L. M. (2008). [http://doi.org/10.1068/p6102 The Leaning Tower illusion is not a simple perspective illusion]. ''Perception'', 37(11), 1769–1772.
 +
* Massironi, M., Antonucci, G., Pizzamiglio, L., Vitale, M. V., & Zoccolotti, P. (1988). [http://doi.org/10.1016/0028-3932(88)90039-5 The Wundt-Jastrow illusion in the study of spatial hemi-inattention]. ''Neuropsychologia'', 26(1), 161–166.
 +
* Müller-Lyer, F. C. (1889). Optische Urteilstauschungen. ''Archiv Für Anatomie Und Physiologie'', (Supplement), 263–270.
 +
* Pecor, C. J. (2001). The boomerangs revisited. ''Linking Ring'', 81(5), 108–109.
 +
* Piccardi, L., Palermo, L., Nori, R., Giusberti, F., & Guariglia, C. (2012). Landmark recognition and mental route navigation disorders in patients with imagery neglect and perceptual neglect. In Y. Spiteri & E. M. Galea (Eds.), ''Psychology of neglect'' (pp. 81–103). Hauppauge, N.Y: Nova Science Publishers.
 +
* Pick, D. F., & Pierce, K. A. (1993). [http://doi.org/10.2466/pms.1993.76.2.491 Theoretical parallels between the Ponzo illusion and the Wundt-Jastrow illusion]. ''Perceptual and Motor Skills'', 76(2), 491–498.
 +
* Price, D. (2000). Color changing boomerangs. ''M-U-M'', 89(May), 36–38.
 +
* Society of Indian Magicians. (1947). Spell of India. ''Linking Ring'', 27(10), 64–65.
 +
* Solomon, E. (n.d.). ''Tales Worth Telling''.
 +
* Spragg, B. (1959). Hocus Pocus Parade. ''Linking Ring'', 38(11), 43–46.
 +
* Sweigard, M. (1968). The two banana illusion. ''Linking Ring'', 48(1), 72–73.
 +
* [[Howard Thurston | Thurston, Howard]] (1927) Which Is Larger?. In [[200 More Tricks You Can Do]].
 +
* Tomonaga, M. (2015). [http://doi.org/10.1177/2041669515622090 Fat Face Illusion, or Jastrow Illusion with Faces, in Humans but not in Chimpanzees]. ''I-Perception'', 6(6).
 +
* Tronick, E., & Hershenson, M. (1979). [http://doi.org/10.1016/0022-0965(79)90068-7 Size-distance perception in preschool children]. ''Journal of Experimental Child Psychology'', 27(1), 166–184.
 +
* von Weber, H. (1940). Money from magic. ''Linking Ring'', 20(4), 302–305.
  
  
 
{{References}}
 
{{References}}
 
{{Wikipedia|Jastrow_illusion}}
 
{{Wikipedia|Jastrow_illusion}}
*http://www.tutztutz.com/2008/02/20-amazing-optical-illusions/
+
Peter Prevos, [http://magicperspectives.net/jastrow-illusion/ The Jastrow Illusion in Magic]
 
+
  
 
[[Category:Illusions]]
 
[[Category:Illusions]]

Revision as of 10:38, 2 June 2016

The Boomerang Illusion (also known as the Jastrow Illusion) is an effect based on an optical illusion in which two boomerang shapes appear to shrink and grow.
The two figures are identical.

The optical illusion is often credited to Professor Joseph Jastrow, a pioneering psychologist, who used it to illustrate optional illusions in 1891. The same illusion was published by Felix Müller-Lyer in 1889 and by Wilhelm Wundt a year later. Psychologists often refter to it as the Jastrow-Wundt illusion of size.

This illusion has been used by psychologists to investigate how the we perceive size based on visual clues and has also been used as to test whether people with brain damage have a full field of vision. The psychological mechanism that causes this illusion is still a matter of discussion amongst researchers. The Jastrow Illusion has even been tested with chimpanzees to find out how our perception functions.

Performing the Jastrow Illusion as a magic trick requires a theatrical approach. Only showing the arcs to be swapping relative size will render it a mere puzzle. Many different variations on this theme have been published and marketed over the decades. The trick can be performed with boomerangs, fish, card fans, mud flaps or anything else that resembles an arch. Magic routines using this principle can use two, three or even four arches, adding layers of deception. When using small segments, there are also possibilities to deploy slight of hand for additional trickery.

It is often sold as part of many magic kits to children.

Bibliography

  • Bartolomeo, P. (2014). Unilateral Spatial Neglect: Clinical Aspects. In P. Bartolomeo, Attention Disorders After Right Brain Damage (pp. 49–83). London: Springer London.
  • Bateman, L. (1949). Yo-It-Chi. Abracadabra, 8(183), 214–215.
  • Braine, M. D. S., & Shanks, B. L. (1965). The development of conservation of size. Journal of Verbal Learning and Verbal Behavior, 4(3), 227–242.
  • Brodahl, L. A. (2015). Scripted! #1: Professors Nightmare and Fiber Optics Extended.
  • Carson, R. (1965). Jimmy Lake, President, Fellowship of Ministers Convention. Linking Ring, 45(2), 111.
  • Dayton, R. (1994). Fish sticks. M-U-M, 83(September), 30–32.
  • de Courcy, K. (1997). A brief talk on the banana. Linking Ring, 77(1), 91–93.
  • Eden, B. (1977). Magic from the “Perception” Perspective. Magic Circular, 71, 63–64.
  • Freer, W. (n.d.). Boomerang Fish. In Freer’s exclusive mysteries. Miracle Factory.
  • Ginn, D. (2010). Baffling boomerangs. Magicana, 57, 10–13.
  • Goldston, W. (1918). An Optical Illusion. In Simple Conjuring Tricks That Anyone Can Perforn (3rd ed.). London: C. Arthur Pearson.
  • Gower, H. (1962). Magic mudguards. Abracadabra, 33(833), 4–6.
  • Hoy, D. (1957). The Bible and magic. Linking Ring, 37(3).
  • Imai, S. (1960). Experiments on Jastrow Illusion. The Japanese Journal of Psychology, 30(5), 350–356.
  • Jastrow, J. (1892). Studies from the Laboratory of Experimental Psychology of the University of Wisconsin. II. The American Journal of Psychology, 4(3), 381.
  • Kaufman, R. (2016). Genii Speaks. Genii, 79(2), 10–11.
  • Kleefield, J. (2008). Boomerang Teach-In. Linking Ring, 88(5), 84–85.
  • Maniatis, L. M. (2008). The Leaning Tower illusion is not a simple perspective illusion. Perception, 37(11), 1769–1772.
  • Massironi, M., Antonucci, G., Pizzamiglio, L., Vitale, M. V., & Zoccolotti, P. (1988). The Wundt-Jastrow illusion in the study of spatial hemi-inattention. Neuropsychologia, 26(1), 161–166.
  • Müller-Lyer, F. C. (1889). Optische Urteilstauschungen. Archiv Für Anatomie Und Physiologie, (Supplement), 263–270.
  • Pecor, C. J. (2001). The boomerangs revisited. Linking Ring, 81(5), 108–109.
  • Piccardi, L., Palermo, L., Nori, R., Giusberti, F., & Guariglia, C. (2012). Landmark recognition and mental route navigation disorders in patients with imagery neglect and perceptual neglect. In Y. Spiteri & E. M. Galea (Eds.), Psychology of neglect (pp. 81–103). Hauppauge, N.Y: Nova Science Publishers.
  • Pick, D. F., & Pierce, K. A. (1993). Theoretical parallels between the Ponzo illusion and the Wundt-Jastrow illusion. Perceptual and Motor Skills, 76(2), 491–498.
  • Price, D. (2000). Color changing boomerangs. M-U-M, 89(May), 36–38.
  • Society of Indian Magicians. (1947). Spell of India. Linking Ring, 27(10), 64–65.
  • Solomon, E. (n.d.). Tales Worth Telling.
  • Spragg, B. (1959). Hocus Pocus Parade. Linking Ring, 38(11), 43–46.
  • Sweigard, M. (1968). The two banana illusion. Linking Ring, 48(1), 72–73.
  • Thurston, Howard (1927) Which Is Larger?. In 200 More Tricks You Can Do.
  • Tomonaga, M. (2015). Fat Face Illusion, or Jastrow Illusion with Faces, in Humans but not in Chimpanzees. I-Perception, 6(6).
  • Tronick, E., & Hershenson, M. (1979). Size-distance perception in preschool children. Journal of Experimental Child Psychology, 27(1), 166–184.
  • von Weber, H. (1940). Money from magic. Linking Ring, 20(4), 302–305.


References

Wikipedia-logo.png This page incorporated content from Jastrow_illusion,

a page hosted on Wikipedia. Please consult the history of the original page to see a list of its authors. Therefor, this article is also available under the Creative Commons Attribution-ShareAlike License

Peter Prevos, The Jastrow Illusion in Magic