EFFECTS OF OUTPUT DISPLAY AND CONTROL DISPLAY GAIN ON HUMAN-PERFORMANCE IN INTERACTIVE SYSTEMS

Human performance comparisons on interactive systems were drawn betwee n output displays (CRT and LCD) across settings of control-display gai n. Empirical evidence was sought in light of the common feeling in the user community that motor-sensory tasks are more difficult on a syste m equipped with an LCD display vs. a CRT display. In a routine target acquisition task using a mouse, movement times were 34% longer and mot or-sensory bandwidth was 25% less when the output display was an LCD v s. a CRT. No significant difference in error rates was found. Control- display (C-D) gain was tested as a possible confounding factor; howeve r, no interaction effect was found. There was a significant, opposing main effect for C-D gain on movement time and error rates, illustratin g the difficulty in optimizing C-D gain on the basis of movement time alone.