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VI DETOURS ROUND SEPARATE INTERVENINGOBJECTIVES
VII CHANCE AND IMITATION
VIII THE HANDLING OF FORMS
SOME CONTRIBUTIONS TO THEPSYCHOLOGY OF CHIMPANZEES
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achieve action animal psychology animal’s animals anthropoids apes association psychology attempt banana bars basket beginning behaviour cage centimetres chance Chica chimpanzee chimpanzee’s climb connexion course covered with ants creature deﬁnitely described detour difﬁcult direction distance door drag easily efforts experiment ﬁeld ﬁnal ﬁnally ﬁnd ﬁrmly ﬁrst ﬁt ﬁve ﬂoor fruit further grasp ground gymnastic hand happened human imitation immediately implement inﬂuence intelligence jump Koko Konsul ladder later lift look ment method metres movements notice Nueva observed once optical optical contact play position possible problem procedure pulls the objective pushed Rana reach the objective repeated repetition result rope roundabout second box seems seizes seqq side signiﬁcance situation solution squatted standing statics stick stones straw string suddenly sufﬁcient Sultan Tenerife Tercera theory thing tion tries Tschego tube turned underneath the objective wall whole wire