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Effects of stimulus modality, information processing activity and motor response on the blink rate were examined. In Experiment 1, visual and auditory stimuli were employed. The blink rate peaked just after a stimulus and then progressively decreased until thenext stimulus. The changes in the blink rate were similar for both the visual and the auditory stimulus conditions. In Experiment 2, only auditory stimuli were given to examine the effects of discriminative responses and motor responses on the blink rate. The heights of peaks increased as the processing load increased, while the motor responses had no effect on the post-stimulus peaks. Attention level was used to explain the pre-stimulus attenuation, and processing load to the post-stimulus peaks.

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This study reports four points about the portable Rod and Frame Test performance of 30 Japanese women in terms of body balance. The primary findings using a stabilometer are: (a) field dependence correlated negatively with increased sway path within 1 min. both while a dot pattern as a visual stimulus was stationary and while it was moving. (b) Field dependence correlated positively with the difference in sway path between the two following phases, in one of which the subjects watched the horizontal visual movement to the right and in the other movement to the left. (c) Motion aftereffect had no direct and immediate influence on sway path, but rather a latent and long-term effect. And on a pedograph which measures the distribution of foot pressure and the shape of the sole, (d) field dependence correlated negatively with anterior positions of the center of foot pressure and with the proportion of the front part to the rear of the sole. Over-all, field dependence measured by the Rod and Frame Test seems to be associated with body posture when dot patterns are viewed.