“[When testing psychic abilities of normal people who claimed no psychic powers, J.B Rhine found that] success rate deteriorates if you undertake prolonged experimentation. As with telepathy, clairvoyance and precognition experiments, J.B Rhine observed that this decline effect reflected the subject's loss of interest. [...] And as with other ESP experiments, the degree of belief in your powers can prove significant. Rhine found that sceptics again scored below what you would expect from chance alone.”