xerox SSL-77-1 Evaluation of Mouse Rate-Controlled Isometric Joystick Step Keys and Text Keys for Text Sel free download

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Palo Alto Research Center Palo Alto Research Center Palo Alto Resec h Center Palo Alto Research Center Palo Alto Research Center Palo Ito Research Center Palo Alto Research Center Palo Alto Research ( nter Palo Alto Research Center Palo Alto Research Center Palo Alto esearch Center Palo Alto Research Center Palo Alto Research Cente Palo Alto Research Center Palo Alto Research Center Palo Alto Rese rch Center Palo Alto Research Center Palo Alto Research Center Pale Alto Research Center Palo Alto Research Center Palo Alto Research ~ enter Palo Alto Research Center Palo Alto Research Center Palo Alto ~esearch Center Palo Alto Research Center Palo Alto Research Cente Palo Alto Research Center Palo Alto Research Center Palo Alto Rese , rch Center Palo Alto Research Center Palo Alto Research Center Pale Alto Research Center Palo Alto Research Center Palo Alto Research ~enter Palo Alto Research Center Palo Alto Research Center Palo Altc Research Center Palo Alto Research Center Palo Alto Research CentE '" Palo Alto Research Center Palo Alto Research Center Palo Alto ResE ~rch Center Palo Alto Research Center Palo Alto Research Center Pall Alto Research Center Palo Alto Research Center Palo Alto Research ~enter Palo Alto Research Center Palo Alto Research Center Palo Alto ={esearch Center Palo Alto Research Center Palo Alto Research CentE Palo Alto Research Center Palo Alto Research Center Palo Alto Rese; EVALUATION OF MOUSE, RATE-CONTROLLED ISOMETRIC JOYSTICK, STEP KEYS, AND TEXT KEYS FOR TEXT SELECTION ON A CRT BY STUART K. CARD, WILLIAM K. ENGLISH, AND BETTY BURR APRIL 1977 SSL-77-1 ABSTRACT Four devices are evaluated with respect to how rapidily they can be used to select text on a CRT display. The mouse is found to be fastest on all counts and also to have the lowest error rates. It is shown that variations in positioning time with the mouse and joystick are accounted for by Fitts's Law. In the case of the mouse, the measured Fitts's Law slope constant is close to that found in other eye-hand tasks leading to the conclusion that positioning time with this device is almost the minimal achievable. Positioning time for the key devices is shown to be proportional to the number of keystrokes which must be typed. KEY WORDS AND PHRASES pointing device, target aquisition, step tracking, mouse, joystick, step keys, text keys, text-editing, Fitts's Law CR CATEGORIES 3.36, 8.1 XEROX PALO ALTO RESEARCH CENTER 3333 Coyote Hill Road I Palo Alto I California 94304 An important element in the design of the man-computer interface is the method of pointing by which the user indicates to the computer his selection of some element on the computer display. This is especially important for