費茨法則又稱菲茲定律，是一個人機互動以及人體工程學中人類活動的模型，它預測了快速移動到目標區域所需的時間是目標區域的距離和目標區域的大小的函式。費茨法則多用於表現 指、點 這個動作的概念模型，無論是用手或者手指進行物理接觸，抑或是在電腦螢幕上用假想的裝置（例如滑鼠）進行虛擬的觸碰。 該法則由 於 1954 年提出。 模型 費茨法則可以用多種不同的公式進行表達。比較通用的是用於一維運動的 Shannon 公式（由 Scott MacKenzie ，約克大學教授提出，並因為其與夏農定理的相似而命名）。 T a b log_2 Bigg 1frac DWBigg 這裡 T 是完成動作的平均時間。（傳統的命名方式，會寫成 MT ，表示運動時間 Movement Time） a 代表裝置（攔截）開始 結束的時間，b 表示該裝置本身的速度（斜率）。這些常數可以以測得資料進行直線近似的方式透過實驗取得。 D 是起始位置到目標中心的距離。（傳統上來說，研究者多用 A 來表示，意味著運動的振幅 Amplitude） W 是目標區域在運動維向上的寬度。因為運動的最終點必須落在目標中心 以內，所以 W 也可以被認為是被允許的最終位置的容差。 從這個等式我們可以看出，小並且 或者遠的目標，需要更長的時間才能得以準確到達，這便是權衡指的動作的 速度的準確性。 參考文獻 Paul M Fitts 1954 The information capacity of the human motor system in controlling the amplitude of movement Journal of Experimental Psychology volume 47 number 6 June 1954 pp 381391 Reprinted in Journal of Experimental Psychology General 121 3262269 1992 Paul M Fitts and James R Peterson 1964 Information capacity of discrete motor responses Journal of Experimental Psychology 67 2103112 February 1964 Stuart K Card William K English and Betty J Burr 1978 Evaluation of mouse ratecontrolled isometric joystick step keys and text keys for text selection on a CRT Ergonomics 21 8601613 1978 I Scott MacKenzie and William A S Buxton 1992 Extending Fitts law to twodimensional tasks Proceedings of 電腦協會 CHI 1992 Conference on Human Factors in Computing Systems pp 219226 httpdoiacmorg101145142750142794 A Murata Extending effective target width in Fitts law to a twodimensional pointing task International Journal of HumanComputer Interaction 11 2137152 1999 httpwwwleaonlinecomdoiabs101207S153275901102_4 Johnny Accot and Shumin Zhai 2003 Refining Fitts law models for bivariate pointing Proceedings of ACM CHI 2003 Conference on Human Factors in Computing Systems pp 193200 httpdoiacmorg101145642611642646 Johnny Accot and Shumin Zhai 2002 More than dotting the is foundations for crossingbased interfaces Proceedings of ACM CHI 2002 Conference on Human Factors in Computing Systems pp 7380 httpdoiacmorg101145503376503390 Stuart K Card Thomas P Moran 艾倫紐厄爾 1983 The Psychology of HumanComputer Interaction I Scott MacKenzie 1992 Fitts law as a research and design tool in humancomputer interaction HumanComputer Interaction volume 7 1992 pp 91139 httpwwwyorkucamackhci1992pdf Meyer D E Smith J E K Kornblum S Abrams R A Wright C E 1990 Speedaccuracy tradeoffs in aimed movements Toward a theory of rapid voluntary action In M Jeannerod Ed Attention and performance XIII pp 173226 Hillsdale NJ Lawrence Erlbaum httpwwwumichedubcalabMeyer_Bibliographyhtml A T Welford 1968 Fundamentals of Skill Methuen 1968 Shumin Zhai 2002 On the Validity of Throughput as a Characteristic of Computer Input IBM Research Report RJ 10253 2002 Almaden Research Center San Jose California httpswebarchiveorgweb20070824104223httpwwwalmadenibmcomuzhaipapersZhaiIBMReporRJ10253pdf 外部連結 Peerreviewed Encyclopedia entry on Fitts Law by Mehmet Gokturk Fittsbits A game investigating Fitts Law by Willem Vervuurt and Laura Cuijpers this game a Webbased experiment is no longer available Fitts Law at AskTog A Quiz Designed to Give You Fitts at AskTog Fitts Law at CS Dept NSFSupported Education Infrastructure Project Fitts Law Modeling Movement Time in HCI Bibliography of Fitts Law Research compiled by I Scott MacKenzie Fitts Law in Microsoft Office User Interface by Jensen Harris Visualizing Fittss Law by Kevin Hale Category 人機互動