Effect of position in visual field on conspicuity

摘要

Signs such as traffic signals and signboards can be presented at various positions in a visual field. However, the effect of the position on conspicuity has not been thoroughly examined, and so it is still not completely understood. In this investigation, a visual experiment was conducted to clarify the effect of position on conspicuity. The results show that conspicuity is high in the vertically upward and downward directions at visual angles of 1° and 5°, and in the horizontal direction at visual angles of 20° and 30°.