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The article studies the effect of delayed visual control on writing, drawing and tracing. The first experiments employing delayed sensory feedback were performed in the acoustic field. Delay in acoustic feedback also affects non-vocal activities. The experiments consisted of replaying speech of a person recorded after a variable delay. For the experiments, Bell Telephone Laboratories employed an apparatus, which consisted of a telewriter, which would produce a delayed trace on a Hughes memoscope, which was watched by the writing subject. A panel of judges would observe the images of the resulting oscillograms for their neatness.