时-空整合影响图形识别的眼动研究

Temporal-Spatial Integrations During Picture Identification

采用眼动追踪的方法对在不同方向(上、下、左与右)及距离(2.0°‘和4.0°视角)上先后出现的特征组合不同的图形识别过程进行了研究。结果表明。首先,对由不同颜色和形状构成的图形的识别受到图形特征组合的影响,视觉系统对颜色和形状的加工存在明显差异,与颜色加工相比,视觉系统需要更多的时间才能完成形状识别。此外,虽然图形识别的速度和准确性受运动方向与距离的影响较小,但在不同运动方向和距离上,视觉系统是通过改变眼动的时间和空间特性来完成识别任务的,视觉系统在识别过程中的这种时间与空间的整合特点还有待于进一步研究。

Eye movements were recorded during the identification of pictures appearing at different locations (toward left, right, up and down, and away from center 2.0’and 4.0'). The combinations of two to-be-marched pictures were formed into four categories, including the same color and the same shape, the same color and different shape, different color and the same shape, different color and different shape. The results indicated that: (1) the combinations of shape and color plays an important role in picture identification; compared with color, the visual system will take more time to distinguish different shapes; (2) the identification is not affected by direction and distance significantly, but it seems that the visual system changes the spatial and temporal characteristics in fulfilling the identification tasks. More details of temporal and spatial integrations of eye movements are yet to be detected.