 Six of these concerned statistical defects, the other six covered procedural flaws such as inadequate documentation, randomization and security as well as possibilities of sensory leakage.Over half of the studies failed to safeguard against sensory leakage and all of the studies contained at least one of the 12 flaws.Because of the flaws, Honorton agreed with Hyman the 42 ganzfeld studies could not support the claim for the existence of psi.