Basic Study on Incidence of Micro-Error in Visual Attention-Controlled Environment

Abstract

Efficiency of the method based on the generation frequency of micro-error (ME), which corresponds to stagnation of a reaching action, in distinguishing the mild cognitive impairment (MCI) patients among healthy elderly persons. In the previous study, the effect of visual condition on the cause of ME occurrence was clarified, and it was indicated that the gaze action just before starting the reaching action contributed to ME generation. In the present study, we investigated the incidence of ME in an environment where visual attention was controlled to determine the effect of gaze behavior. In the present study, we measured two factors such as the viewing angle (5°, 10°, 20°, 30°) and direction (top, bottom, right, left) as independent variables. Although no significant difference was observed in terms of the direction, a considerable variation was noted in the visual field angle, and a positive correlation was indicated between the number of occurrences of ME and the visual field angle. Based on these results, the relationship between the gazing behavior and ME was clarified.