Perception and the Conditioned Reflex

a-rhythm depression action activity alteration appearance application associated auditory background becomes changes combination complex component conditioned adaptation reflexes conditioned reflex conditioned stimulus connected connexion continued cortex cortical course darkness defence reaction defence reflex demonstrated depends differentiation diminishes disappears duration effect elaboration electrical elements established excitation experiments extinction extinguished fact Figure formation frequency galvanic skin reaction gives rise hand higher illumination important impulses increased indicated influence inhibition intensification intensity latent period latter leads light stimulus liminal manifests means measured mechanism motor reaction movement nature negative non-signal non-specific observed operation orientation reaction orientation reflex pain perception photic positive produced pupil reactivity reappearance recording reduction reinforcement relationship repetition resistance response result reticular rhythm sensitivity shown shows signal stimulus significance similar Sokolov sound specific strong threshold tion unconditioned units various vascular vasoconstriction verbal visual analyser weak weakening