Technical Details

          The maximum number of dots to be displayed can be set by the experimenter to be 100, 200, or 400. The number of dots in the standard may be set between 1 and 400.The area of the display is 240 by 240 pixels. A dot is 2 by 2 pixels in area. (There would be 14,400 possible dot positions if side-by-side dot placement was allowed.) The position of the dots is random and subject to the minimum dot-to-dot distance. This may be set to either 5 or 10 display pixels. When the minimum dot-to-dot distance is set to 5, there are 1600 possible dot positions available in the display (40 by 40). When the minimum dot-to-dot distance is set to 10, there are 400 possible dot positions (20 by 20). Thus, a setting of 10 increases the regularity of the dot pattern by limiting the number of dot patterns that may be displayed (for the same total number of dots). Note that both the maximum dots (max size) and dot regularity settings affect the average density of dots in the display.