Abstract: 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.

Key words: dispersion, rate of information transfer, cognitive performance