A useful interactive application that calculates the coordinates of equidistant points on a circle. Perfect for working out where to place targets / images in visual world, visual search paradigms. Input the desired number of points/co-ordinates and adjust the radius. By default the radius value is degrees of visual angle, in which case the correct screen width and distance should be entered. The radius units can be changed to mm or pixels. The points can be rotated by adjusting the Start Degree value. The center coordinates of the circle can also be adjusted. Output is a list of coordinates that can be copied for use in Experiment Builder and other stimulus presentation software.
The connection to the calculator will close after a few minutes of inactivity – just refresh the page and it will be back! We also have calculators for computing the coordinates of targets targets in a grid and for computing degrees of visual angle – give them a try!