Analysis on visual ergonomics of instrument display system through event-related-potential

The present study investigates the visual ergonomics of different instrument shapes and colors based on event-related-potential. Two color combinations of the dial scales were used, which were named G-dials and B-dials respectively under each dial shape. Fifteen participants took part in the experiments. The two groups of dials were used as target stimuli respectively with P300 recorded. The participants were required to press specific key when the target stimuli appeared. Reaction time (RT) and accuracy were recorded simultaneously. The influence on amplitude and change of beta band power spectra was significant (p<;0.05). Visual stimuli intensity of G-dials (white-red combination) is stronger than that of B-dials (green-yellow combination) and the degree to motivate the brain is higher than that of B-dials. Moreover the color combinations of B-dials have the trend of accelerating visual fatigue. P300 can be the better metric than reaction time and accuracy in ergonomic analyzing of instrument interface. The findings may be of value for the evaluation of instrument display design.