person al ▁situations . ▁Le ary ' s ▁research ▁was ▁an ▁important ▁har b inger ▁of ▁transaction al ▁analysis , ▁directly ▁pre fig uring ▁the ▁popular ▁work ▁of ▁Eric ▁Ber ne . ▁ ▁Psych ed el ic ▁experiments ▁and ▁experiences ▁ ▁Mexico ▁and ▁Harvard ▁research ▁( 1 9 5 7 – 1 9 6 3 ) ▁ ▁Introduction ▁to ▁psych ed el ic ▁m ush rooms ▁ ▁On ▁May ▁ 1 3 , ▁ 1 9 5 7 , ▁Life ▁magazine ▁published ▁an ▁article ▁by ▁R . ▁Gordon ▁Wass on ▁about ▁the ▁use ▁of ▁ps il ocy bin ▁m ush rooms ▁in ▁religious ▁r ites ▁of ▁the ▁ind igen ous ▁Maz ate c ▁people ▁of ▁Mexico . ▁Anthony ▁Rus so , ▁a ▁colle ague ▁of ▁Le ary ' s , ▁had ▁experiment ed ▁with ▁psych ed el ic ▁Ps il ocy be ▁mex icana ▁m ush rooms ▁on ▁a ▁trip ▁to ▁Mexico ▁and ▁told ▁Le ary ▁about ▁it . ▁In ▁August ▁ 1 9 6 0 , ▁Le ary ▁tra ve led ▁to ▁Cu ern av aca , ▁Mexico ▁with ▁Rus so ▁and ▁consum ed ▁ps il ocy bin ▁m ush rooms ▁for ▁the ▁first ▁time , ▁an ▁experience ▁that ▁dr ast ically ▁alter ed ▁the ▁course ▁of ▁his ▁life . ▁In ▁ 1 9 6 5 , ▁Le ary ▁commented ▁that ▁he ▁had ▁" lear ned ▁more ▁about ▁... ▁( his ) ▁brain ▁and ▁its ▁possibilities ▁... ▁[ and ] ▁more ▁about ▁psych ology ▁in ▁the ▁five ▁hours ▁after ▁taking ▁these ▁m