Are you a better "Mouser" or "Trackballer"?

Abstract
The method or input device by which a user indicates a selection to the computer is an important element in the design of that system. Recent advances in the technology of human-computer interfaces suggest that a "direct-manipulation" style of interface provides many advantages over traditional human-computer interfaces (e.g. Hutching, Hollan and Norman, 1986). Such an interface is typified by the presence of visual objects on a display screen (e.g., icons or other graphical elements) and the ability to manipulate those objects by somehow "pointing" to them or moving them. This approach has recently been popularized by such microcomputer systems as the Apple Macintosh (TM).

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