Tracking performance on a visual display apparently vibrating at one to ten Hertz

Abstract

20 20-34 yr. old males performed compensatory 2-dimensional tracking on a visual display. This was viewed through a periscope, the lower mirror of which was oscillated about an axis so as to impose apparent vertical vibration on the display. The vibration frequency range 1-10 Hz. was explored, at (double) amplitudes of 2 and 4–. The decrement due to apparent vibration was frequency dependent, being greatest at those frequencies (3-5 Hz.) where a changeover in viewing technique was taking place. Over this range, progressively, reflexive eye pursuit is abolished and a virtual image at the limit of vibration excursion becomes usable. Data from eye movement studies on an additional group of 6 Ss corroborate this. (27 ref.) (PsycInfo Database Record (c) 2025 APA, all rights reserved)