▁and ▁Charles ▁Ol son ). ▁ ▁Con cord ▁Pr ison ▁Ex periment ▁ ▁Le ary ▁argued ▁that ▁psych ed el ic ▁subst ances — in ▁proper ▁dos es , ▁a ▁stable ▁setting , ▁and ▁under ▁the ▁guidance ▁of ▁psych olog ists ▁could ▁benefit ▁behavior ▁in ▁ways ▁not ▁easily ▁obtained ▁by ▁regular ▁ther apy . ▁He ▁experiment ed ▁in ▁tre ating ▁alco hol ism ▁and ▁reform ing ▁crim inals , ▁and ▁many ▁of ▁his ▁subjects ▁said ▁they ▁had ▁prof ound ▁myst ical ▁and ▁spiritual ▁experiences ▁which ▁perman ently ▁improved ▁their ▁lives . ▁ ▁The ▁Con cord ▁Pr ison ▁Ex periment ▁evaluated ▁the ▁application ▁of ▁ps il ocy bin ▁and ▁psych other apy ▁in ▁the ▁re h abil itation ▁of ▁released ▁prisoners . ▁Th irty - six ▁prisoners ▁were ▁reported ▁to ▁have ▁rep ented ▁and ▁sw orn ▁off ▁criminal ity ▁after ▁being ▁gu ided ▁through ▁the ▁psych ed el ic ▁experience ▁by ▁Le ary ▁and ▁his ▁associ ates . ▁The ▁overall ▁rec id iv ism ▁rate ▁for ▁American ▁prisoners ▁was ▁ 6 0 ▁percent , ▁whereas ▁the ▁rate ▁for ▁those ▁in ▁Le ary ' s ▁project ▁reported ly ▁dropped ▁to ▁ 2 0 ▁percent . ▁The ▁experiment ers ▁concluded ▁that ▁long - term ▁reduction ▁in ▁criminal ▁rec id iv ism ▁could ▁be ▁effect ed ▁with ▁a ▁combination ▁of ▁ps il ocy bin - ass isted ▁group ▁psych other apy ▁( inside ▁the ▁prison ) ▁along ▁with ▁a ▁compreh ensive ▁post - release ▁follow - up ▁support ▁program ▁mode led ▁on ▁Al co hol ics ▁An