规则多边图形的离散度与图形信号认知绩效的关系

用实验方法研究规则多边图形的离散度与图形信号认知绩效的关系。实验的自变量是图形的离散度参数，因变量是单位时间图形信号的视觉通道信息传递量。实验的刺激材料是２５个离散度为０．３～０．７的规则多边图形。刺激材料的呈现与被试的反应记录都由计算机控制。结果表明：离散度适中（０．５左右）及偏小的图形信号认知绩效较高，离散度从０．５增大到０．６，认知绩效迅速下降，离散度继续增大，认知绩效仍有下降，但趋势平缓。

THE RELATIONSHIP BETWEEN THE DISPERSION OF REGULAR POLYGON SIGNALS AND THE COGNITIVE PERFORMANCE

An experiment was conducted to investigate the relationship between the dispersion of regular polygon signals and its cognitive performance;The experimental variable was the dispersion of polygons, and the dependent variable was the rate of visual information transfer.The stimuli materials were 25 regular polygons with different dispersion ranging from 0.3 to 0.7.The experimental procedure was carried on a computer,including stimuli presenting and the reaction data collecting.The results showed that the polygon signals with middle(about 0.5)or lower dispersion had higher cognitive performance.With the dispersion increasing from 0.5 to 0.6,the cognitive performance decreased rapidly,then with the dispersion further increasing,the cognitive performance decreased continuously,but the decrease rate bacame slower.