离散度参数对规则多边图形认知工效的影响

The Affect of Regular Polygon Dispersion on its Signal Cognitive Performance

本研究用实验方法研究离散度参数对规则多边图形认知工效的影响。实验的自变量是图形的离散度参数，因变量是各离散度图形信号的反应时。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工效较高，离散度从０．５增大到０．６，认知工效迅速下降，离散度继续增大，认知工效仍有下降，但趋势平缓。

An experiment was conducted to investigate the affect of regular polygon dispersion on its signal cognitive performance.The experimental variable was the dispersion of polygons and the dependent variable was the response time of every polygons. 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 the 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 became slower.