A fun collection of visual illusions.

1. Making sense of what
you see

2. Bistable perception

4. QuickTime™ and a
GIF decompressor
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QuickTime™ and a
GIF decompressor
are needed to see this picture.

5. Visual awareness

9. So how does it work?
• Eye movements
• Expectations
• Network of frontal and parietal areas
• Activation in regions associated with what
you perceive

10. Apparent motion

14. How does it work?
• Micro saccades: involuntary movements we
make even when staring at a still object
• Refresh the photoreceptors in the eye
• Normally we don’t notice the motion
• The contrasts and shapes confuses us
Otero-Millan, Macknik, Martinez-Conde, JoN, 2012

15. Change blindness
QuickTime™ and a
QuickDraw decompressor
are needed to see this picture.
http://www.youtube.com/watch?v=6JONMYxaZ_s
http://www.youtube.com/watch?v=vBPG_OBgTWg

16. QuickTime™ and a
decompressor
are needed to see this picture.

17. QuickTime™ and a
decompressor
are needed to see this picture.

18. Hybrid images

20. How does it work?
• Viewing distance, timing

21. How does it work?
• Saccadic eye movement
• Attention
• Expertise
• We don’t perceive and remember all details

22. Artistic illusions
Jonty Hurwitz

24. via Edgar Mueller)

26. Thank you!

27. QuickTime™ and a
decompressor
are needed to see this picture.

28. QuickTime™ and a
decompressor
are needed to see this picture.