▁of ▁Er ick son ' s ▁accounts ▁of ▁his ▁th era pe ut ic ▁approaches ▁and ▁lecture ▁demonstr ations ▁in ▁the ▁context ▁of ▁scientific ▁literature ▁on ▁hyp not ism ▁and ▁his ▁own ▁experience ▁in ▁giving ▁live ▁demonstr ations ▁of ▁hyp not ic ▁technique . ▁Em phas ising ▁social - ps ych ological ▁pers pect ives , ▁Ts ander ▁introdu ces ▁an ▁" inter pret ive ▁filter " ▁with ▁which ▁he ▁re - evalu ates ▁Er ick son ' s ▁own ▁accounts ▁of ▁his ▁demonstr ations ▁and ▁introdu ces ▁pro sa ic ▁explan ations ▁for ▁occurr ences ▁that ▁both ▁Er ick son ▁and ▁other ▁authors ▁tend ▁to ▁port ray ▁as ▁remarkable . ▁ ▁In flu ence ▁on ▁others ▁ ▁Er ick son ' s ▁friend , ▁and ▁som etime ▁collabor ator , ▁Andre ▁We itzen hof fer , ▁a ▁well - known ▁hyp nos is ▁research er ▁himself , ▁has ▁repeatedly ▁raised ▁concerns ▁over ▁the ▁nature ▁of ▁Er ick son ' s ▁legacy . ▁ ▁The ▁majority ▁of ▁today ' s ▁Er ick son ians ▁consist ▁of ▁individuals ▁who ▁have ▁never ▁known ▁Er ick son , ▁even ▁less ▁been ▁directly ▁trained ▁by ▁him . ▁ ▁Today , ▁and ▁for ▁some ▁time ▁now , ▁much ▁of ▁the ▁teaching ▁of ▁the ▁Er ick son ian ▁approach ▁is ▁and ▁has ▁been ▁done ▁by ▁individuals ▁who ▁have ▁acquired ▁their ▁knowledge ▁second ▁and ▁third ▁hand . ▁... ▁Some ▁of ▁those ▁who ▁did ▁spend ▁time ▁with ▁Er ick son , ▁like ▁Jeff rey ▁Ze ig , ▁Ernest ▁Ros si ,