| In ganzfeld experiments, subjects place two halves of an ordinary ping-pong ball over their eyes, erasing any visual stimulation. |
| Discussion of the ganzfeld controversy in Psychological Bulletin accounted for 63 citations. |
| One major concern is that the ganzfeld methodology does not in every instance produce significant results. |
| For example, the initial ganzfeld studies obtained significant results with pictures as targets. |
| As mentioned above, there were problems with the original ganzfeld experiments involving sensory leakage and randomization procedures. |
| Prior to a ganzfeld session, the experimenter turned on the autoganzfeld equipment. |
