Download - Illusions - in Dutch
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Waarom je ziet wat je ziet
Frans W. Cornelissen & Barbara Nordhjem
Laboratorium voor Experimentele OogheelkundeUMCG
www.visualneuroscience.nl
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Google: visueel vergelijkbare beelden?
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Niet slecht
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Google vindt dit vergelijkbaar
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Google had ook deze beelden kunnen tonen
Maar deed dat niet
Waarnemen en herkennen is geen triviaal probleem!
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Waarom zien we wat we zien?
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Kijk naar de rode stip
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Kijk naar je buurvrouw of -man
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Functionele specialisatie
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Medische relevantie?
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Patiënten met schizofrenie minder invloed van context, daardoor BETER in matching taken
Anderson et al. 2012
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Mogelijk samenhang met kleinere receptieve velden
in de primaire visuele cortex
Anderson et al. 2012
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Face adaptation
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Waarom je ziet wat je ziet
Je brein vergelijkt visuele informatieover de tijd en ruimte,past zich heel snel aan,
en laat weg wat er altijd is
www.visualneuroscience.nl
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Zien is vergelijken
Workshop: Hand illusie
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Zien is leren en interpreteren
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Hoog Contrast Laag Contrast
Zelfde gezicht
Vrouw Man
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Zien is leren en interpreteren
Hollow Face Ilusion
Workshop: maak je eigen illusie
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Waarom je ziet wat je ziet
Je (brein) ziet niet noodzakelijk wat er echt is, maar wat je hebt leren zien
Je brein vergelijkt visuele informatieover de tijd en ruimte,past zich heel snel aan,
en laat weg wat er altijd is
www.visualneuroscience.nl
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Tube illusion
Take a cardboard tube, such as from a kitchen paper role, and hold it close to your eye, while keeping the other eye open. Look at a bright wall. The disk-shaped area seen through the tube will appear strikingly brighter than the same surface area viewed by the other eye. The effect is reminiscent of a flashlight illuminating the area under consideration. The effect takes a few seconds to fully develop. It also works with a textured surface where it enhances not only the brightness and color, but also the detail.
Lothar Spillmann, Joe Hardy, Peter Delahunt, Baingio Pinna, and John S. Werner
UCD Medical Center, USA;University of Freiburg, Germany;PositScience, USA;University of Sassari, Italy
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Courtesy Stevin Dakin, UCL
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Courtesy Stevin Dakin, UCL
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What do we need to perceive a moving person?
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“Change blindness”
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6060
Can you see this?Can you see this?
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Neon color spreading
van Tuijl (1975)
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Watercolor effect
Pinna, Brelstaff & Spillmann (2001)