title: The experimenter as an independent variable in studies of animal hypnosis in chickens (Gallus gallus).
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D001522:Behavior, Animal; D002645:Chickens; D004777:Environment; D005239:Fear; D005403:Fixation, Ocular; D006799:Housing, Animal; D006990:Hypnosis; D007103:Immobilization; D009949:Orientation; D013037:Spatial Behavior; D014796:Visual Perception