1. Please read this sentence and count the number of F’s:
FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS.

4. Which of the two inner circles is the same size
Which of the two inner circles is the same size? Measure them and see for yourself.

7. Can you see the grey spots where the dark lines intersect?

9. Is the top or the bottom of the box closest to you?

12. Does this box really have curved edges?

13. Are the two lines the same length?

18. Do you think the diamonds on the bottom are much lighter than the diamonds on top? Actually all the diamonds in the picture are exactly the same.

19. How many horses can you see?

23. The human mind
I cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdanieg. The phaonmneal pweor of the hmuan mind. Aoccdrnig to rscheearch at Cmabrigde Uinervtisy, it deson't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoatnt tihng is taht the frist and lsat ltteer be in the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe.
Amzanig Huh?

24. Do we perceive with our eyes or our brain?
Change blindness – Derren Brown
Scene 1
Scene 2
Scene 3
Balls and Cups

25. Motion blindness
Waterfall effect

26. The Right Brain vs Left Brain test
The Right Brain vs Left Brain test ... do you see the dancer turning clockwise or anti-clockwise?
If clockwise, then you use more of the right side of the brain and vice versa. Most of us would see the dancer turning anti-clockwise though you can try to focus and change the direction; see if you can do it.