During a summer reading clinic held at the Kent State University Child Study Center, 40 school children were asked to record their guesses in regard to 25 cards in a sealed envelope. The multiple-choice answer sheets listed 25 series of 5 words. The envelope, however, contained coded symbols of these words in the form of photographic reproductions. Test II involved a deck of 25 cards containing the words themselves rather than pictures of the words. To encourage motivation, a transistor radio was promised to the highest scorer. On Test I, correct choices were not made significantly more often than chance. On Test II, the number of hits was statistically significant, indicating that coded symbol targets were more difficult to perceive by clairvoyance than non-coded targets.
