119 students at a South African University were divided into 4 test groups. One group received hypnosis and relaxation treatment; a second group received hypnosis only. A third group received relaxation only and the fourth group received no special treatment. The treatment was carried out between April and June examinations. The improvement in test results was significantly greater for the two groups receiving hypnosis than for the control groups.
reported in American Journal of Clinical Hypnosis Oct 2006