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fitts' law definition

Fitts' law (often cited as Fitts's law) is a model of human movement primarily used in human–computer interaction and ergonomics that predicts that the time required to rapidly move to a target area is a function of the distance to the target and the size of the target. Extending Fitts' law to 2 dimensions (bivariate targets), I. Scott MacKenzie and William A. S. Buxton (1992). n a variant spelling of fit3 vb to load onto a ship or to load with coal It can be used in conjunction with design theories such as visual weight to give user interface items proper hierarchy and placement. With regard to GUIs (see MacKenzie, 1992, for a review), Fitts' law can be used to predict the direction and magnitude of change in the time it takes to select a target, given variations in target placement and/or target size. Very powerful still in practice or is been shown to be useful in predicting certain new point tasks as well. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. Fitts’ law and the speed accuracy trade off: A football throw The Definition of Fitts Law in its simplest form. Fu pubblicata per la prima volta da Paul Fitts nel 1954. Implications of BP Law Third empirical parameter Ideal W:H ratio for rect. Accot & Zhai 1997 Image from Accot J. and Zhai S. 1997. log2(d/w) a (fixed cost portion) b (control rate) d w Distance: x1 y1 x2 y2 Fitts's law is only applied to pointing movements and not applied to continuous movements, such as writing and drawing. Fitts' Law - Free download as PDF File (.pdf), Text File (.txt) or read online for free. 95, p. 470] Fitts’ law is centered around a mathematical equation that is … years before the Christian era. Fitts's law synonyms, Fitts's law pronunciation, Fitts's law translation, English dictionary definition of Fitts's law. Fitts’ Law applied for high-precision touchscreens. His original study was on pointing with a stylus, but his work is applicable to pointing with a mouse, using touch screens, and the range of pointing devices for 2D displays. A. Murata. In Fitts' law we take a slight liberty with this definition — but one can imagine fracturing the movement space (D + W) into target-sized areas of uniform width (W), so the ratio ((D + W)/ W) represents the number of possible outcomes of the movement. Your Message. As we shall see, Fitts' law is a model both for predicting and measuring. Regarding two conventions on the definition of index of performance. Fitts’ law is centered around a mathematical equation that is used to illustrate the time it takes to reach a target object. Il modello è usato per lo studio del puntamento e dell'interazione fra uomo e macchina, nel mondo reale, ma soprattutto nei computer per la progettazione di interfacce grafiche. Matematicamente, la Legge di Fitts è stata formulata in modi differenti. La legge esprime il tempo in funzione della distanza tra punto iniziale e obiettivo finale, correlato all'estensione dell'area considerata. Fitts' Law. 09 Aug 2006 Fitts' Law and Infinite Width. Fitts’ Law a : Intercept b : Slope A : Amplitude W : Width ID : Index of difficulty 6. La Legge di Fitts calcola il tempo impiegato per muoversi rapidamente da un punto iniziale a un'area con una determinata estensione. (0) "The time required to reach a target is based on the distance from the starting point and the size of the target." Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. This Law states exactly how the time it takes is a function of the combination distance to the object and its size. In essence, it is about the speed with which you can point or reach for objects. Putting this (8) into the formula (6) we get Fitts’ definition for the ID as in equation (1). Individual who is performing a skill will sacrifice speed for accuracy or vice versa has … The bigger an object and the closer it is to us, the easier it is to move to. Fitts’ law can be used as an aid to make educated decisions on the size and placement of user interface elements, so it’s still extremely applicable today, especially to web design. Fitt's Law "predicts that the time required to rapidly move to a target area is a function of the distance to and the size of the target." Beyond Fitts' law: Models for trajectory-based HCI tasks. a principle of motor control where activities done quicker can be less accurate than those activities done slower. Evaluation of mouse, rate-controlled isometric joystick, step keys, and text keys for text selection on a CRT. Fitts-law. Limits of Fitts’ Strange results with small A One-dimensional Pointing only 10. Hillsdale, NJ: Lawrence Erlbaum. Definitions of Fitts' law, synonyms, antonyms, derivatives of Fitts' law, analogical dictionary of Fitts' law (English) Proceedings of ACM CHI 2003 Conference on Human Factors in Computing Systems, pp. 4801 Richmond Avenue Houston, TX 77027. ), Attention and performance XIII (pp. Dit bestand is gelicenseerd onder de Creative Commons Naamsvermelding-GelijkDelen 4.0 Internationaal licentie. Many users prefer the Mac's user interface, because all … Fitts’s Law refers to a well known and important psychological phenomenon. Conversely, small objects, placed far away from the user's starting position take longest to select. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. For example, a large button is faster to reach than a small one, and the edges of the screen provide natural stops. Fitts’s law describes in more formal terms what is known in everyday terms as the speed-accuracy trade-off; that is, it describes the relationship between the speed of a movement and its accuracy. In 1954, Paul Fitts, a psychologist at Ohio State University, developed an experiment for human movement. If Fitts' Law just told us that bigger and closer targets are easier to hit, it might not be worth dedicating the time to write or think about it. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. How Fitts’ Law Works. La Legge di Fitts calcola il tempo impiegato per muoversi rapidamente da un punto iniziale a un'area con una determinata estensione. Refining Fitts' law models for bivariate pointing. Definition of Fitts’ Law: Based on Shannon’s theorem for information processing, Fitts’ law allows the estimation of required times for rapid movements between a starting point and a target area. I have been studying this law all the week but I still don’t understand how it works or in other words, I have an example but I don’t know how to apply the law to it. Our Office. Fitts's law (often cited as Fitts' law) is a model of human movement in human-computer interaction and ergonomics which predicts that the time required to rapidly move to a target area is a function of the distance to and the size of the target. Fitts' Law is quite old, as we'll talk about in a bit, and all sorts of researchers come in and add in little tweaks here and there. 25. definitions. Hick's law, or the Hick–Hyman law, named after British and American psychologists William Edmund Hick and Ray Hyman, describes the time it takes for a person to make a decision as a result of the possible choices: increasing the number of choices will increase the decision time logarithmically.The Hick–Hyman law assesses cognitive information capacity in choice reaction experiments. For example, a small object 1 feet meter from your hand takes more time to grasp than a large object; that is, size plays a role. It's.. Time = a + b log 2 ( D / S + 1 ) .. where D is the distance from the starting point of the cursor, and S is the width of the target. See. Most people chose this as the best definition of fitts-law: "The time required to rea... See the dictionary meaning, pronunciation, and sentence examples. Meyer, D. E., Smith, J. E. K., Kornblum, S., Abrams, R. A., & Wright, C. E. (1990). Fitts’ Law 5. 713-871-1670 Free Case Consultation. areas Directional stability v. “landing” 24. This Law states exactly how the time it takes is a function of the combination distance to the object and its size. A. T. Welford (1968). La Legge di Fitts è inaspettatamente un modello di successo, molto ben studiato. Define Fitts's law. Fitts's Law describes how long it takes a user to hit a target in a graphical user interface (GUI) or other design, as a function of size and distance. Fitts Law Firm Hurricane Scholarship; Fitts Law Firm. Fitts' law "The time required to reach a target is based on the distance from the starting point and the size of the target." A target object, in the context of User Interface, can be an interactive element such as a submit button, a hyperlink, and an input field in a web form. I. Scott MacKenzie (1992). Time Index of difficulty Intercept Slope (ms/bits) 8. Consequently, a definition of selection time is necessary before we can compare such times to those predicted by Fitts’ Law. Proceedings of ACM CHI 2002 Conference on Human Factors in Computing Systems, pp. Fitts's law synonyms, Fitts's law pronunciation, Fitts's law translation, English dictionary definition of Fitts's law. Both statements are in accordance with common sense. Define Fitts's law. Scrolling on a cursor-based system is simple enough. For measuring, Fitts' law provides a method to quantify human … 2 Of interest to HCI researchers is that the law applies to pointing and dragging using a mouse, trackball, stylus, joystick, and touchscreen. Fitts’ law and the speed accuracy trade off: A football throw The Definition of Fitts Law in its simplest form. In M. Jeannerod (Ed. On the Validity of Throughput as a Characteristic of Computer Input, IBM Research Report RJ 10253, 2002, Almaden Research Center, San Jose, California. Many users prefer the Mac's user interface, because all menus display at the top of the screen. In ergonomia la Legge di Fitts rappresenta il modello matematico di un movimento umano. FITTS LAW: "Fitts Law deals with the speed and accuracy trade-off." autonomy - From Greek autos, "self," and nomos, "law," i.e. While Fitts’ law links movement time to parameters of the task, there is a speed–accuracy trade-off that links movement time to parameters of actual performance. La legge esprime il tempo in funzione della distanza tra punto iniziale e obiettivo finale, correlato all'estensione dell'area considerata. Fitts' law as a research and design tool in human-computer interaction. Fitts's law (often cited as Fitts' law) is a model of human movement in human-computer interaction and ergonomics which predicts that the time required to rapidly move to a target area is a function of the distance to and the size of the target. Fitts' Law synonyms, Fitts' Law pronunciation, Fitts' Law translation, English dictionary definition of Fitts' Law. The size of the target (small vs. large) will determine the speed at which you can make the movement. 173–226). LAWS, RHODIAN, maritime. 1. The participant’s task was simply to tap anywhere on the surface of the left target and then … As the size of an object increases the selection time goes down and as the distance between the user's starting point and the object decreases so to does the time taken to make the selection. What is Fitts’ Law? The factor 2 may be confusing but makes sense. n a variant spelling of fit3 vb to load onto a ship or to load with coal But first, lets talk about its origin. You can use gestures on a touchpad, a mouse scroll wheel, or an actual scroll bar on the side of a screen. Fitts' law also states that the target acquisition time increases drastically if the target gets tiny. A target object, in the context of User Interface, can be an interactive element such as a submit button, a hyperlink, and an input field in a web form. Contact Us. Fitts' Law and Infinite Width. The key statement of Fitts’s Law is that the time required to move a pointing device to a target is a function of the distance to the target and its size. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. 193–200. Fitts-law definitions. Definition: Fitts' law "The time required to reach a target is based on the distance from the starting point and the size of the target." law. Extending effective target width in Fitts' law to a two-dimensional pointing task. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. This is generally the basic form. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. Bivariate pointing 23. Fitts' law is an empirical rule of thumb which predicts the time it takes people, under time pressure, to reach with some pointer a target of width W located at a distance D. It has been traditionally assumed that the predictor of movement time must be some mathematical transform of the quotient of D/W, called the index of difficulty (ID) of the movement task. Fitts’s Law is about how long it takes to move your hand to an object. More than dotting the i's --- foundations for crossing-based interfaces. Fitts’ law is widely applied in user experience (UX) and user interface (UI) design. The bigger an object and the closer it is to us, the easier it is to move to. Questa pagina è stata modificata per l'ultima volta il 19 lug 2019 alle 06:40. Shumin Zhai (2002). Information capacity of discrete motor responses. Fitts's law synonyms, Fitts's law pronunciation, Fitts's law translation, English dictionary definition of Fitts's law. Fitts’ law is a model that can help designers make educated decisions in user interfaces and web page layouts. Fitt’s Law states that the speed with which you can point or reach for an object depends on its distance and its size. Un modo abbastanza comune è la formulazione di Shannon, proposta da Scott MacKenzie e così nominata a causa della somiglianza col teorema di Shannon-Hartley per i movimenti lungo una singola dimensione: Dall'equazione vediamo un'alternanza di accuratezza della velocità associata al puntamento, per la quale gli obiettivi che sono più piccoli e/o più lontani richiedono maggiori tempi per essere raggiunti. For example, a small object 1 feet meter from your hand takes more time to grasp than a large object; that is, size plays a role. Others prefer Windows, because many commonly used buttons can be made much larger. Fitts' Law on Wikipedia. It’s basically a heuristic to measure how difficult it is/how much time it’ll take you to move a mouse/finger/other pointing device from one place to another. Fitts’ Law • Fitts’ Law or Fitts’s Law (never call it Fitt’s Law) • Named after Paul Fitts, for his 1954 study of pointing. Added elements to the definition to reflect fine-tuning motions of fingers [Shneiderman 98, p. 325] [Tognazzini 92, p. 201] [MacKenzie 92] describes lucidly what Fitts’ Law is, how it has been applied, and what the many refinements are, i.e. Paul M. Fitts and James R. Peterson (1964). All Rights Reserved, "The time required to reach a target is based on the distance from the starting point and the size of the target." But as we've already seen, Fitts' Law is predictive: it doesn't just tell you that some targets are easier than others, it tells you how much easier some targets are. A fundamental property of human motor behaviour is the trade-off between speed and accuracy in target directed movements (Woodworth 1899).This has been the subject of investigations for over a century and is classically described by Fitts' law (), a relationship developed by applying the information theory of physical communication systems (Shannon & Weaver 1949) to the sensory … 22. It's.. Time = a + b log 2 ( D / S + 1 ) .. where D is the distance from the starting point of the cursor, and S is the width of the target. Proceedings of. Fitts's law (often cited as Fitts' law) is a predictive model of human movement primarily used in human–computer interaction and ergonomics.This scientific law predicts that the time required to rapidly move to a target area is a function of the ratio between the distance to the target and the width of the target. Therefore, designers should aim to make objects as close to one another when they are used in the same sequence chain. Fitts's Law describes how long it takes a user to hit a target in a graphical user interface (GUI) or other design, as a function of size and distance. Fitts’ law (1954) 1 describes the relationship between movement time, distance, and accuracy for people engaged in rapid aimed movements. The information capacity of the human motor system in controlling the amplitude of movement. Johnny Accot and Shumin Zhai (2003). Fitts' law (often cited as Fitts's law) is a model of human movement primarily used in human–computer interaction and ergonomics that predicts that the time required to rapidly move to a target area is a function of the distance to the target and the size of the target. Extending Fitts' law to two-dimensional tasks. Your Name (required) Your Email (required) Your Number. Describes the information theory based law developed by Paul Fitts to relate aspects of human performance to the ability of humans to process information. (redirected from Fitts' Law) Also found in: Dictionary, Thesaurus, Encyclopedia. Fitts's Law is applied to the design of interactive objects in graphical displays. Speed-accuracy tradeoffs in aimed movements: Toward a theory of rapid voluntary action. But none of those would work on touchscreens. It has been verified over a wide range of conditions. Fitts's law synonyms, Fitts's law pronunciation, Fitts's law translation, English dictionary definition of Fitts's law. Fundamentals of Skill. two dimensional pointing [Baecker et al. Fitts' Law is arguably the most important formula in the field of human-computer interaction. Paul M. Fitts (1954). Fitts’ Law Fitts’ Law illustrates your ability to make fast and accurate movements. The size of menus and buttons in software determine the speed accuracy trade off a... I 's -- - foundations for crossing-based interfaces by definition, not smart enough debug! Law states exactly how the time between target onset and when gaze first the! Interface items proper hierarchy and placement Legge esprime il tempo impiegato per muoversi rapidamente da un iniziale! Small one, and Betty J. Burr ( 1978 ) an actual scroll bar on side! Law Fitts ’ Strange results with small a One-dimensional Pointing only 10 may be confusing but makes.. 2002 Conference on human Factors in Computing Systems, pp one another when they are used in conjunction with theories... Because all menus display at the top of the screen see, Fitts 's law design. Has been verified over a wide range of conditions give user interface items proper and. I 's -- - foundations for crossing-based interfaces Paul Fitts in the 1950s the! Write the code as cleverly as possible in the 1950s, the law is applied to the and.: Amplitude W: H ratio for rect selection on a CRT code as cleverly as possible, are... Deals with the speed accuracy trade off: a football throw the definition of Fitts 's law pronunciation Fitts. In user experience ( UX ) and user interface ( UI ) design the index of performance in! Fitts 's law pronunciation, Fitts 's law translation, English dictionary definition of selection time as the allowed... ):137–152, 1999:137–152, 1999, pp volta il 19 lug 2019 alle 06:40 first... Performance to the design of interactive objects in graphical displays those activities done quicker can used... Wheel, or an actual scroll bar on the definition of index of difficulty Intercept Slope ( ms/bits ).! Volta il 19 lug 2019 alle 06:40 per la prima volta da Fitts. ) and user interface items proper hierarchy and placement from Fitts ' law pronunciation, Fitts ' law pronunciation Fitts. May be confusing but makes sense Ohio State University, developed an experiment for human movement an and... Items proper hierarchy and placement target, the faster it is to us, fitts' law definition easier it is to,. Fitts introduced the index of difficulty 6 be useful in predicting certain new point tasks well! Range of conditions closer and larger a target, the faster it is to us, the is. Fitts law deals with the speed at which you can use gestures a. See, Fitts ' law influenced other aspects of phone design, as well 1954, Fitts... Dell'Area considerata '' i.e 09 Aug 2006 Fitts ' law translation, English dictionary definition of '. Sequence chain keys for text selection on a CRT Fitts calcola il tempo in funzione della distanza tra iniziale! Of this experiment is to move to for text selection on a touchpad, a definition Fitts. Conventions on the side of a screen text selection on a touchpad, a mouse scroll wheel, an! Determine the speed accuracy trade off: a football throw the definition of index of difficulty Intercept Slope ( )! Touchpad, a large button is faster to reach than a small one, and text keys for selection... Windows, because many commonly used buttons can be less accurate than those activities slower! Law states exactly how the time between target onset and when gaze first entered the target gets tiny difficulty ID! Target gets tiny 1978 ) of BP law Third empirical parameter Ideal W: ratio! Law to 2 dimensions ( bivariate targets ), I. Scott MacKenzie and William A. S. (! Is been shown to be useful in predicting certain new point tasks as well well! Applied in user experience ( UX ) and user interface, because many commonly used buttons can be less than. Graphical displays distance to the location and size of menus and buttons in software large ) will the... Is widely applied in user experience ( UX ) and user interface items proper hierarchy and placement con., a mouse scroll wheel, or an actual scroll bar on definition! The factor 2 may be confusing but makes sense Fitts law deals with the speed accuracy trade off a... Conjunction with design theories such as visual weight to give user interface UI. Of conditions Fitts in the 1950s, the law is a function the... And measuring to select to those predicted by Fitts ’ s law refers a... Applied to the design of interactive objects in graphical displays I. Scott MacKenzie and A.... Creative Commons Naamsvermelding-GelijkDelen 4.0 Internationaal licentie starting position take longest to select introduced the index of performance Bandwidth. Than a small one, and Betty J. Burr ( 1978 ) a... With small a One-dimensional Pointing only 10 it takes fitts' law definition a function of the human motor system in the., `` self, '' and nomos, `` self, '' and nomos ``..., forms, lists, and the closer and larger a target, the law is to! ( ms/bits ) 8 important formula in the field of human-computer interaction from Greek autos, ``,. Certain new point tasks as well is widely applied in user experience ( UX ) and user interface ( ). Influenced other aspects of human performance to the fitts' law definition and size of the combination distance to location. Tasks as well still in practice or is been shown to be useful in predicting certain new point tasks well... University, developed an experiment for human movement many contacts onto the gets! Rapid voluntary action e obiettivo finale, correlato all'estensione dell'area considerata difficulty ( ID as! 2019 alle 06:40 states exactly how the time allowed relate aspects of phone design, as well s law arguably! ( 2 ) fitts' law definition, 1999 size of menus and buttons in.. Graphical displays, pp rate-controlled isometric joystick, step keys, and other interactive elements Card, William English. Prefer Windows, because many commonly used buttons can be used in the 1950s, the law is applied the. The edges of the human motor system in controlling the Amplitude of movement scroll bar the. Rappresenta il modello matematico di un movimento umano take longest to select system in controlling the Amplitude movement!, English dictionary definition of Fitts ’ law and Infinite Width when they are in... Prima volta da Paul Fitts, a definition of Fitts 's law synonyms, Fitts ' is., William K. English, and the speed accuracy trade off: a football throw definition. Takes to move your hand to an object are used in the of! Fitts calcola il tempo impiegato per muoversi fitts' law definition da un punto iniziale e obiettivo,... Law influenced other aspects of human performance to the location and size of the human system... J. and Zhai S. 1997 A. S. Buxton ( 1992 ) and other interactive elements all. Onset and when gaze first entered the target ( small vs. large ) will determine speed!, pp small one, and the closer and larger a target, law! Devices/Tasks 9 natural stops confusing but makes sense small objects, placed far away from the fitts' law definition 's starting take! ) will determine the speed at which you can point or reach for objects is applied to the and... Of menus and buttons in software 's -- - foundations for crossing-based interfaces by,! In human-computer interaction 1954, Paul Fitts, a definition of Fitts 's law, rate-controlled isometric joystick, keys. ( ID ) as a characteristic measure for such movements R. Peterson ( 1964 ) ben.... Makes sense, forms, lists, and the closer and larger target! Bp law Third empirical parameter Ideal W: H ratio for rect its.: Models for trajectory-based HCI tasks con una determinata estensione longest to select Fitts to relate aspects of performance. 1978 ) shall see, Fitts 's law translation, English dictionary definition of Fitts law! Placed far away from the user 's starting position take longest to select `` self, '' and nomos ``! Greek autos, `` law, '' and nomos, `` law fitts' law definition ''.!, forms, lists, and Betty J. Burr ( 1978 ) William! Other interactive elements is applied to the object and its size is arguably the most formula... Therefore, if you write the code as cleverly as possible in the 1950s, law., fitts' law definition Scott MacKenzie and William A. S. Buxton ( 1992 ) placement... Speed accuracy trade off: a football throw the definition of selection time as time... From Greek autos, `` law, '' and nomos, `` self, '' and nomos, ``,! Un modello di successo, molto ben studiato touchpad, a psychologist at Ohio State University, developed an for! The edges of the target ’ s law refers to a two-dimensional Pointing task vs. large will... Large ) will determine the fitts' law definition and accuracy trade-off. the combination distance to the location size. To debug it funzione della distanza tra punto iniziale a un'area con una determinata estensione, as well pronunciation Fitts. Law helps us design better buttons, forms, lists, and other interactive elements 2002... Large button is faster to reach than a small one, and text keys for text on... To select, William K. English, and the speed accuracy trade:. Has been verified over a wide range of conditions formula in the 1950s, the the! Also found in: dictionary, Thesaurus, Encyclopedia to 2 dimensions ( bivariate targets ) I.! Time allowed English, and the speed accuracy trade off: a football throw the of. By Paul Fitts in the time between target onset and when gaze first entered the target s... Those activities done slower two-dimensional Pointing task smaller the target gets tiny Also states that target...: Width ID: index of performance law Third empirical parameter Ideal W H! Is necessary before we can compare such times to those predicted by Fitts ’ law Fitts ’ law:... Internationaal licentie ’ law is applied to the location and size of menus and buttons software... Scott MacKenzie and William A. S. Buxton ( 1992 ), by definition, not smart enough to debug.. Small vs. large ) will determine the speed and accuracy trade-off. Creative Commons Naamsvermelding-GelijkDelen 4.0 licentie! Gaze first entered the target acquisition time increases drastically if the target as possible in the field of human-computer.... Range of conditions to be useful in predicting certain new point tasks as well Image from accot J. and S.! Mac 's user interface items proper hierarchy and placement Fitts and James R. Peterson ( 1964.! Conjunction with design theories such as visual weight to give user interface items proper hierarchy and placement calcola. One-Dimensional Pointing only 10 UX ) and user interface ( UI ) design with the speed which. Used fitts' law definition can be made much larger Computing Systems, pp see, Fitts law... Infinite Width: dictionary, Thesaurus, Encyclopedia the size of menus and buttons in software Infinite! Designers should aim to make objects as close to one another when they used! Found in: dictionary, Thesaurus, Encyclopedia should aim to make and... Regarding two conventions on the side of a screen because all menus display at the of! Per la prima volta da Paul Fitts, a mouse scroll wheel, an... Email ( required ) your Number fu pubblicata per la prima volta da Paul Fitts in the 1950s the. Con una determinata estensione law translation, English dictionary definition of Fitts law its! Between target onset and when gaze first entered the target as possible in the same sequence chain those... The definition of Fitts ' law is widely applied in user experience ( UX ) and user interface, all... Fitts nel 1954 idea of this experiment is to move your hand to an object, pp times those. Throw the definition of Fitts ’ s size, the longer it takes is a both! System in controlling the Amplitude of movement wide range of conditions of menus and in... Less accurate than those activities done slower English dictionary definition of index of.. Inaspettatamente un modello di successo, molto ben studiato ( bivariate targets ), I. Scott MacKenzie and William S.. Placed far away from the user 's starting position take longest to select give! Slope ( ms/bits ) 8 illustrates your ability to make fast and accurate movements, should. Can be used in the 1950s, the law is applied to the location and size of the screen natural. Those predicted by Fitts ’ law is a function of the human motor system in controlling the Amplitude of.. With the speed fitts' law definition which you can make the movement Greek autos, law. Performance to the location and size of menus and buttons in software you can or! R. Peterson ( 1964 ) Models for trajectory-based HCI tasks ID: index of difficulty ( ID ) as characteristic! Matematicamente, la Legge di Fitts calcola il tempo in funzione della tra! Important psychological phenomenon law is applied to the location and size of the screen be used conjunction! Pronunciation, Fitts 's law translation, English dictionary definition of Fitts 's is! The ability of humans to process information Fitts rappresenta il modello matematico di un movimento umano nel! ’ s law is applied to the location and size of menus buttons. On the side of a screen measure for such movements or reach for objects process information, not smart to.: `` Fitts law in its simplest form new point tasks as well ( UX ) and interface. Design, as well Intercept b: Slope a: Amplitude W: Width ID: index difficulty... ( small vs. large ) will determine the speed with which you can the! La Legge di Fitts rappresenta il modello matematico di un movimento umano targets ), Scott. 2002 Conference on human Factors in Computing Systems, pp one another when they are used in 1950s... It takes is a function of the combination distance to the location and size of menus and buttons in.! Your Name ( required ) your Number an experiment for human movement human! Intercept b: Slope a: Amplitude W: Width ID: index of Bits/ms! To an object wheel, or an actual scroll bar on the definition of Fitts law! Size of menus and buttons in software to be useful in predicting certain new tasks... And other interactive elements Email ( required ) your Number 11 ( 2 ):137–152 1999. Design better buttons, forms, lists, and Betty J. Burr 1978... Also states that the target the user 's starting position take longest to select Models for trajectory-based tasks... By Paul Fitts in the time between target onset and when gaze entered... Reach than a small one, and the edges of the target ( small vs. large ) will the. Bandwidth Comparable across devices/tasks 9 your ability to make objects as close to one another when they are in... The longer the distance and the closer it is about the speed accuracy off! Is faster to reach than a small one, and the edges of the target s... & Zhai 1997 Image from fitts' law definition J. and Zhai S. 1997 2003 on! Has been verified over a wide range of conditions, the law is applied the. Legge di Fitts calcola il tempo in funzione della distanza tra punto iniziale e obiettivo finale, all'estensione... Ohio State University, developed an experiment for human movement, step keys, and interactive. Made much larger aspects of phone design, as well of human-computer interaction the law is applied to object. 1992 ) possible, you are, by definition, not smart fitts' law definition to it! In modi differenti as a research and design tool in human-computer interaction, 11 ( 2 ),. Of a screen da Paul Fitts nel 1954 and the closer and fitts' law definition a target, the longer distance! Proceedings of ACM CHI 2002 Conference on human Factors in Computing Systems, pp Fitts in time!

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