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Quote: derive Fitts' Law by assuming that the relative accuracy of movement is constant; the measured time for acquiring a target is within the computed range
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Group:
testing and evaluating user interfaces
Topic:
selecting with a mouse
Quotation Skeleton
moving the hand towards a target, can be … [refs]. … [p. 52] To make a correction [in moving to the target] takes a … Processor to decide on the correction, and one … Let X_i be the distance remaining to the … Assume that the relative accuracy of movement is … [p. 53] Hence the total movement time T_pos is … I_M log_2 (2D/S) [2.2], where I_M = -(.tau._P+.tau._C+.tau._M)/log_2 … [and D is the total distance, and S is the target width] … [p. 55] The measured correction times correspond to I_M=50 … [27 .tilde. 122] msec/bit). Google-1 Google-2
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Group: testing and evaluating user interfaces (9 topics, 258 quotes)
Topic: selecting with a mouse (44 items)