The reasoning behind the tests — what intuition is, what it is not, and where these particular games are honest.
Yes, but not the way most tests imply. Intuition is fast pattern recognition. It works well in some situations and badly in others, and the difference is predictable.
Five symbols, twenty-five cards, and the most famous experiment in parapsychology. What Rhine found at Duke, what was wrong with how he found it, and how to score the test properly.
Turning an image greyscale does not hide colour, it destroys it. The arithmetic that throws the information away, and why most versions of this test are broken anyway.