多靶搜索中的扫视眼动研究

本文研究在二维多靶视觉搜索实验中的眼动。通过对成功扫视幅度的计算和分析，发现视力角（有用周边视网膜区域）在一定条件下随着靶干扰物的密度增大而减小，随着搜索场景对比度的增大而增大。熟练的搜索者比不熟练者呈现较大视力角；在显示屏作平面图形搜索场景，头部固定的试验条件下，绝大多数扫视幅度不大于８度。

Saccadic Eye Movements in Multiple Target Search

The present paper concerns eye movements in 2-D multiple target search. The author studied visual lobe by measuring and calculating successful saccade sizes. The experiment results showed that in some certain conditions, visual lobe is influenced by the nature of the target and of the visual scene or search area. For example, with same clutter (decoy) density, high contrast corresponds to wide lobe; while under same contrast high clutter density caused narrower lobe size. The author also found that,in a screen display search scene and fixed-head condition, most saccade sizes are seldom larger that 8 degrees.