OE Effect Sizes (d)
l Adolescent OE programs (43 studies)            : .31
(Cason & Gillis, 1994)
l All OE research (96 studies)                       : .34
(cited in Hattie, Marsh, Neil, & Richards, 1997)
l Adventure Therapy - LOC                      : .38
(Hans, 1997, 2000)
l USA summer camps with self-focus      : .41
(cited in Hattie, Marsh, Neil, & Richards, 1997)