In the following study you will be shown strokes taken from hand drawn sketches. You will be asked to make a decision about each stroke, telling us whether or not it is a polyline, polygon, line, arc or ellipse.
To make your choice choose:You can use the keyboard shortcuts indicated on the buttons. However, due to bugs in some browsers, for the first stroke you may have to click one of the buttons with the mouse but subsequent strokes should respond to keystrokes.