Pea-ESP! 2

Pea-ESP is a program to test whether you possess ESP, ie Extrasensory Perception. It includes a lot of discussion about the merits and weaknesses of the idea of ESP. The game that's played to test whether you have ESP powers is a simple guessing game: Concentrate your mind carefully, and guess which cup the marble is under. It seems like ESP claims / interest were bigger in the 20th century than they are in the 21st, so this program has lost a lot of it's relevance. But it's interesting as an attempt to study the supposed phenomenon; you can submit your results as part of a supposed study, which likely didn't receive enough interest to generate any worthwhile results.