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	Fitts' lag	Heuristisk utvärdering
Ämnesområde	Människa-datorinteraktion	Människa-datorinteraktion
Familj	Hypothesis test	Hypothesis test
Ursprungsår	1954	1990
Upphovsperson	Paul Fitts	Jakob Nielsen and Rolf Molich
Typ	Empirical model of human movement time as function of distance and target size	Expert-based inspection using established design principles
Ursprungskälla	Fitts, P. M. (1954). The information capacity of the human motor system in controlling the amplitude of movement. Journal of Experimental Psychology, 47(6), 381–391.	Nielsen, J. (1994). Heuristic evaluation of user interfaces. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (pp. 249–256).
Alias	Fitts Law, Rapid Aimed Movement Law	HE, Expert Evaluation, Nielsen's Heuristics
Närliggande	4	4
Sammanfattning	Fitts's Law is an empirical model of human rapid aimed movement, predicting that movement time increases logarithmically with the ratio of distance to target size. Formulated by Paul Fitts in 1954, this fundamental law describes how long it takes to move to and select a target (e.g., clicking a button on a screen or reaching a physical object). In human-computer interaction, Fitts's Law is widely applied to evaluate and optimize pointer-based interfaces such as mice, touchpads, and touch screens.	Heuristic Evaluation is a usability inspection method in which small teams of expert evaluators examine an interface and judge its compliance with established usability principles (heuristics). Developed by Jakob Nielsen and Rolf Molich in 1990, this method is rapid and low-cost, identifying 60–90% of usability problems with as few as 3–5 evaluators. Nielsen's Ten Usability Heuristics—visibility of system status, match between system and real world, user control and freedom, consistency and standards, error prevention and recovery, recognition over recall, flexibility and efficiency, aesthetic and minimalist design, error recovery, and documentation—form the basis of most evaluations.