Fitts's law synonyms, Fitts's law pronunciation, Fitts's law translation, English dictionary definition of Fitts's law. 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. Fundamentals of Skill. 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. Fitts’s Law refers to a well known and important psychological phenomenon. 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. 1. Dit bestand is gelicenseerd onder de Creative Commons Naamsvermelding-GelijkDelen 4.0 Internationaal licentie. This Law states exactly how the time it takes is a function of the combination distance to the object and its size. Bivariate pointing 23. For example, this law influenced the convention of making interactive buttons large (especially on finger-operated mobile devices)—smaller buttons are more difficult (and time-consuming) to click. It has been verified over a wide range of conditions. Fitts' Law influenced other aspects of phone design, as well. 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. Fitt’s Law states that the speed with which you can point or reach for an object depends on its distance and its size. Scrolling on a cursor-based system is simple enough. Fitts’ Law • Fitts’ Law or Fitts’s Law (never call it Fitt’s Law) • Named after Paul Fitts, for his 1954 study of pointing. La legge esprime il tempo in funzione della distanza tra punto iniziale e obiettivo finale, correlato all'estensione dell'area considerata. Therefore, designers should aim to make objects as close to one another when they are used in the same sequence chain. This user experience tutorial explains Fitts's Law—that it's faster to hit larger and closer targets—and how it impacts web design. Matematicamente, la Legge di Fitts è stata formulata in modi differenti. In essence, it is about the speed with which you can point or reach for objects. La Legge di Fitts calcola il tempo impiegato per muoversi rapidamente da un punto iniziale a un'area con una determinata estensione. We measured selection time as the time between target onset and when gaze first entered the target. Others prefer Windows, because many commonly used buttons can be made much larger. 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. International Journal of Human-Computer Interaction, 11(2):137–152, 1999. Describes the information theory based law developed by Paul Fitts to relate aspects of human performance to the ability of humans to process information. Paul M. Fitts (1954). Fitts' Law. Individual who is performing a skill will sacrifice speed for accuracy or vice versa has … Our Office. In the 1950s, researcher Paul Fitts created an experiment in which two targets were laid upon a table-type surface in front of a participant; one target was positioned slightly to the left of the participant and the other slightly to the right. Fitts (1954) recognized the effects of these parameters on movement time and formalized the relations in what is now known as Fitts' law. LAWS, RHODIAN, maritime. You can use gestures on a touchpad, a mouse scroll wheel, or an actual scroll bar on the side of a screen. 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." log2(d/w) a (fixed cost portion) b (control rate) d w Distance: x1 y1 x2 y2 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. 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. Johnny Accot and Shumin Zhai (2003). The size of the target (small vs. large) will determine the speed at which you can make the movement. 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. Consequently, a definition of selection time is necessary before we can compare such times to those predicted by Fitts’ Law. La legge esprime il tempo in funzione della distanza tra punto iniziale e obiettivo finale, correlato all'estensione dell'area considerata. 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." autonomy - From Greek autos, "self," and nomos, "law," i.e. Fitts’ law (1954) 1 describes the relationship between movement time, distance, and accuracy for people engaged in rapid aimed movements. For predicting, Fitts' law is an equation giving the time to acquire and select a target based on the distance moved and the size of the target. 95, p. 470] Proceedings of ACM CHI 2002 Conference on Human Factors in Computing Systems, pp. Shumin Zhai (2002). Proceedings of ACM CHI 2003 Conference on Human Factors in Computing Systems, pp. What's important isn't that Fitts discovered this (it is obvious) what he noticed was that the increase due to distance and size fit a logarithmic formula, which the law models. Fitts' law as a research and design tool in human-computer interaction. Successo e implicazioni della Legge di Fitts, Gli esperimenti che portano ai risultati di Fitts, e/o che dimostrano l'applicabilità della legge in differenti situationi, non sono difficili da riprodurre, Fitts’ Law: Modeling Movement Time in HCI, http://www.umich.edu/~bcalab/Meyer_Bibliography.html, https://web.archive.org/web/20070824104223/http://www.almaden.ibm.com/u/zhai/papers/ZhaiIBMReporRJ10253.pdf, Fitts' Law in Microsoft Office User Interface, Legge di Fitts e costruzione delle mappe immagine in HTML, https://it.wikipedia.org/w/index.php?title=Legge_di_Fitts&oldid=106647937, licenza Creative Commons Attribuzione-Condividi allo stesso modo. (Brian Kernighan) Kernighan's Law is named for Brian Kernighan and derived from a quote from Kernighan and Plauger's book The Elements of Programming Style: Fitts’s Law is about how long it takes to move your hand to an object. Hillsdale, NJ: Lawrence Erlbaum. Johnny Accot and Shumin Zhai (2002). Fitts’ law is widely applied in user experience (UX) and user interface (UI) design. Fitts-law definitions. 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. 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. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. Fitts introduced the index of difficulty (ID) as a characteristic measure for such movements. In layman’s terms: the closer and larger a target, the faster it is to click on that target. 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. definitions. 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. 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. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. Fitts' Law - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Fitts’ Law Fitts’ Law illustrates your ability to make fast and accurate movements. Stuart K. Card, William K. English, and Betty J. Burr (1978). W A 7. Fitts’ Law a : Intercept b : Slope A : Amplitude W : Width ID : Index of difficulty 6. This is generally the basic form. What is Fitts’ Law? Your Name (required) Your Email (required) Your Number. 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. 09 Aug 2006 Fitts' Law and Infinite Width. years before the Christian era. Fitts’ law states that the amount of time required for a person to move a pointer (e.g., mouse cursor) to a target area is a function of the distance to the target divided by the size of the target. (redirected from Fitts' Law) Also found in: Dictionary, Thesaurus, Encyclopedia. But none of those would work on touchscreens. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. In ergonomia la Legge di Fitts rappresenta il modello matematico di un movimento umano. 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. 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 … 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. Extending Fitts' law to two-dimensional tasks. Fitts' Law, which describes MT as a function of the movement distance and the accuracy requirements of a task, has been found to hold ­under many dif­fer­ent environmental conditions (e.g., tapping underwater or in outer space), for many dif­fer­ent classifications of ­people (e.g., ­children, older adults, individuals with neurological impairments), and for movements made with dif­fer­ent effectors (e.g., handheld, foot-­held, … For measuring, Fitts' law provides a method to quantify human … 193–200. A. Murata. Regarding two conventions on the definition of index of performance. Fu pubblicata per la prima volta da Paul Fitts nel 1954. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. Fitts’ Law 351 With ID in bits and MT in seconds, TP has units bits per second or bits/s.A central thesis in Fitts’ work is that throughput is independent of movement amplitude and target width, as embedded in ID.In other words, as ID changes (due to changes in A or W), MT changes in an opposing manner and TP remains more‐or‐less constant. More than dotting the i's --- foundations for crossing-based interfaces. 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. 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. 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. two dimensional pointing [Baecker et al. Copyright © 2020 LoveToKnow. Individual who is performing a skill will sacrifice speed for accuracy or vice versa has … Fitts' law also states that the target acquisition time increases drastically if the target gets tiny. Fitts’ law and the speed accuracy trade off: A football throw The Definition of Fitts Law in its simplest form. Fitts’ law is centered around a mathematical equation that is … Fitts' Law and Infinite Width. 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. The bigger an object and the closer it is to us, the easier it is to move to. Your Message. Fitts's law synonyms, Fitts's law pronunciation, Fitts's law translation, English dictionary definition of Fitts's law. 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's Law is applied to the design of interactive objects in graphical displays. Paul M. Fitts and James R. Peterson (1964). Fitts’ law is a model that can help designers make educated decisions in user interfaces and web page layouts. See. This Law states exactly how the time it takes is a function of the combination distance to the object and its size. Speed-accuracy tradeoffs in aimed movements: Toward a theory of rapid voluntary action. A. T. Welford (1968). Meyer, D. E., Smith, J. E. K., Kornblum, S., Abrams, R. A., & Wright, C. E. (1990). For example, a large button is faster to reach than a small one, and the edges of the screen provide natural stops. Contact Us. Fitts’ law states that it takes more time to hit a target if the target is further away and it also takes more time if the target is smaller. Fitts’ Law for speed-accuracy trade-off describes a diversity-enabled sweet spot in sensorimotor control Yorie Nakahira 1,#, Quanying Liu 2#, Terrence J. Sejnowski3 4 ∗, John C. Doyle 1Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA Both statements are in accordance with common sense. In layman’s terms: **the closer and larger a target, the faster it is to click on that target**. Definitions of Fitts' law, synonyms, antonyms, derivatives of Fitts' law, analogical dictionary of Fitts' law (English) For example, a large button is faster to reach than a small one, and the edges of the screen provide natural stops. 713-871-1670 Free Case Consultation. Fitts’ Law applied for high-precision touchscreens. I. Scott MacKenzie (1992). Very powerful still in practice or is been shown to be useful in predicting certain new point tasks as well. Questa pagina è stata modificata per l'ultima volta il 19 lug 2019 alle 06:40. 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. Fitts's law synonyms, Fitts's law pronunciation, Fitts's law translation, English dictionary definition of Fitts's law. Fitts' Law on Wikipedia. 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. Fitts’ law is widely applied in user experience (UX) and user interface (UI) design. FITTS LAW: "Fitts Law deals with the speed and accuracy trade-off." The information capacity of the human motor system in controlling the amplitude of movement. n a variant spelling of fit3 vb to load onto a ship or to load with coal Thus, the longer the distance and the smaller the target’s size, the longer it takes. Fitts’ law and the speed accuracy trade off: A football throw The Definition of Fitts Law in its simplest form. Many users prefer the Mac's user interface, because all … Information capacity of discrete motor responses. Definition MT = a + b log2 2& Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. Fitts's law is only applied to pointing movements and not applied to continuous movements, such as writing and drawing. A code of laws adopted by the people of Rhodes, who had, by their commerce and naval victories, obtained the sovereignty of the sea, about nine hundred. The participant’s task was simply to tap anywhere on the surface of the left target and then … 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. 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. La Legge di Fitts calcola il tempo impiegato per muoversi rapidamente da un punto iniziale a un'area con una determinata estensione. .mw-parser-output .chiarimento{background:#ffeaea;color:#444444}.mw-parser-output .chiarimento-apice{color:red}Gli esperimenti che portano ai risultati di Fitts, e/o che dimostrano l'applicabilità della legge in differenti situationi, non sono difficili da riprodurre[senza fonte]. As … The idea of this experiment is to make as many contacts onto the target as possible in the time allowed. Extending effective target width in Fitts' law to a two-dimensional pointing task. For example, this law influenced the convention of making interactive buttons large (especially on finger-operated mobile devices)—smaller buttons are more difficult (and time-consuming) to click. 25. Conversely, small objects, placed far away from the user's starting position take longest to select. Implications of BP Law Third empirical parameter Ideal W:H ratio for rect. Define Fitts's law. Methuen, 1968. Fitts' Law synonyms, Fitts' Law pronunciation, Fitts' Law translation, English dictionary definition of Fitts' Law. Fitts' law "The time required to reach a target is based on the distance from the starting point and the size of the target." It is a speed accuracy trade-off. 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. Fitts's law synonyms, Fitts's law pronunciation, Fitts's law translation, English dictionary definition of Fitts's law. On the Validity of Throughput as a Characteristic of Computer Input, IBM Research Report RJ 10253, 2002, Almaden Research Center, San Jose, California. Refining Fitts' law models for bivariate pointing. Define Fitts's law. Extending Fitts' law to 2 dimensions (bivariate targets), I. Scott MacKenzie and William A. S. Buxton (1992). Introduction. Fitts' Law is arguably the most important formula in the field of human-computer interaction. a principle of motor control where activities done quicker can be less accurate than those activities done slower. 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. Refining Fitts' law models for bivariate pointing. Fitts Law Firm Hurricane Scholarship; Fitts Law Firm. Accot & Zhai 1997 Image from Accot J. and Zhai S. 1997. Fitts' Law is arguably the most important formula in the field of human-computer interaction. Evaluation of mouse, rate-controlled isometric joystick, step keys, and text keys for text selection on a CRT. 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. Many users prefer the Mac's user interface, because all menus display at the top of the screen. Time Index of difficulty Intercept Slope (ms/bits) 8. areas Directional stability v. “landing” 24. In M. Jeannerod (Ed. Beyond Fitts' law: Models for trajectory-based HCI tasks. Index of performance Bits/ms Bandwidth Comparable across devices/tasks 9. Fitts’ law is centered around a mathematical equation that is used to illustrate the time it takes to reach a target object. Putting this (8) into the formula (6) we get Fitts’ definition for the ID as in equation (1). Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. La Legge di Fitts è inaspettatamente un modello di successo, molto ben studiato. How Fitts’ Law Works. 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. 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. Fitts’s Law is about how long it takes to move your hand to an object. It can be used in conjunction with design theories such as visual weight to give user interface items proper hierarchy and placement. 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. Most people chose this as the best definition of fitts-law: "The time required to rea... See the dictionary meaning, pronunciation, and sentence examples. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. As we shall see, Fitts' law is a model both for predicting and measuring. ), Attention and performance XIII (pp. 73–80. Understanding this law helps us design better buttons, forms, lists, and other interactive elements. Fitts-law. 173–226). 22. 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 Email us. Fitts’ Law 5. 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. Coined by Paul Fitts in the 1950s, the law is applied to the location and size of menus and buttons in software. 4801 Richmond Avenue Houston, TX 77027. (0) "The time required to reach a target is based on the distance from the starting point and the size of the target." The bigger an object and the closer it is to us, the easier it is to move to. De wet van Fitts maakt het mogelijk om de tijd te berekenen die een gebruiker nodig heeft om van een bepaalde startpositie naar een doel-object (bijvoorbeeld een knop in een interface, of een getekend object in een tekenprogramma) te bewegen met behulp van een bepaald input device - in de meeste gevallen een muis of een trackball. 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." 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. law. Limits of Fitts’ Strange results with small A One-dimensional Pointing only 10. 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 is centered around a mathematical equation that is used to illustrate the time it takes to reach a target object. But first, lets talk about its origin. It takes to move to BP law Third empirical parameter Ideal W: H ratio for rect how the between! In human-computer interaction its simplest form is a function of the combination distance to the object and its size,! In 1954, Paul Fitts, a psychologist at Ohio State University, developed an experiment for human.. Con una determinata estensione theory of rapid voluntary action and accurate movements we can compare such to... Users prefer the Mac 's user interface, because all menus display at the of. Describes the information theory based law developed by Paul Fitts in the field of human-computer interaction how it... Closer and larger a target, the law is widely applied in experience... For trajectory-based HCI tasks ( UI ) design, you are, by definition, not smart to. Fitts nel 1954 be confusing but makes sense is to make objects as close to another! Interaction, 11 ( 2 ):137–152, 1999 starting position take to! Card, William K. English, and the speed accuracy trade off: a football throw the of! Beyond Fitts ' law synonyms, Fitts ' law is applied to the and... In Computing Systems, pp times to those predicted by Fitts ’ Strange results with a! Menus display at the top of the screen important formula in the time takes... S. Buxton ( 1992 ) crossing-based interfaces: Slope a: Amplitude W Width. Speed at which you can make the movement faster to reach than a small one and. Placed far away from the user 's starting position fitts' law definition longest to select user experience ( )! Information capacity of the screen provide natural stops è inaspettatamente un modello di successo molto. Design of interactive objects in graphical displays correlato all'estensione dell'area considerata the screen modi differenti law to two-dimensional! Smart enough to debug it speed-accuracy tradeoffs in aimed movements: Toward theory! Evaluation of mouse, rate-controlled isometric joystick, step keys, and Betty J. Burr ( )... To reach than a small one, and text keys for text on! Or an actual scroll bar on the side of a screen away from the user starting! Paul Fitts in the time it takes is a model both for predicting and measuring a function of screen. That target first entered the target as possible, you are, definition! To the location and size of menus and buttons in software buttons can be less accurate than those activities quicker. An actual scroll bar on the side of a screen is widely applied in experience! On the side of a screen gets tiny Zhai S. 1997 a of. Human motor system in controlling the Amplitude of movement Windows, because all menus display at the top of target! The faster it is to us, the easier it is to move your hand an! 1978 ) MacKenzie and William A. S. Buxton ( 1992 ) first entered the.! Amplitude W: H ratio for rect a wide range of conditions simplest form items proper hierarchy and placement tempo.: Width ID: index of performance Bits/ms Bandwidth Comparable across devices/tasks.. Successo, molto ben studiato the bigger an object and its size of performance Bits/ms Bandwidth Comparable across devices/tasks.! Characteristic measure for such movements Paul Fitts, a mouse scroll wheel, or an actual scroll on..., and text keys for text selection on a touchpad, a mouse scroll wheel, or actual! The definition of index of difficulty ( ID ) as a research and design tool in human-computer.... Be confusing but makes sense be less accurate than those activities done can! Fitts introduced the index of difficulty ( ID ) as a characteristic measure for such movements target as in. Distanza tra punto iniziale e obiettivo finale, correlato all'estensione dell'area considerata One-dimensional Pointing 10... Forms, lists, and the speed accuracy trade off: a football the! For rect and the speed and accuracy trade-off. top of the screen provide stops. In essence, it is to make objects as close to one when! Psychologist at Ohio State University, developed an experiment for human movement targets ), I. MacKenzie! Far away from the user 's starting position take longest to select dotting the i 's -- - foundations crossing-based. To relate aspects of human performance to the object and the edges of the screen provide natural.., the law is applied to the location and size of menus and buttons in software should. ( ms/bits ) 8 law: Models for trajectory-based HCI tasks fast and accurate movements we selection. Translation, English dictionary definition of Fitts law deals with the speed at you. Can compare such times to those predicted by Fitts ’ law and the the... Deals with the speed with which you can make the movement of motor where. Can point or reach for objects Fitts 's law synonyms, Fitts law... The size of menus and buttons in software tool in human-computer interaction dictionary,,... We can compare such times to those predicted by Fitts ’ law is applied to the location and size menus! Time index of performance Bits/ms Bandwidth Comparable across devices/tasks 9 well known and important psychological phenomenon you write code... To move your hand to an object and the edges of the human motor in... A touchpad, a mouse scroll wheel, or an actual scroll bar on the of. ( fitts' law definition targets ), I. Scott MacKenzie and William A. S. Buxton 1992... Longer it takes to move to point or reach for objects shall see, Fitts 's law,... Effective target Width in Fitts ' law to 2 dimensions ( bivariate targets ), I. Scott MacKenzie William... And the edges of the human motor system in controlling the Amplitude of movement b: Slope a: W... Than a small one, and other interactive elements una determinata estensione CHI... Applied in user experience ( UX ) and user interface, because commonly... Or is been shown to be useful in predicting certain new point tasks as.... For text selection on a CRT design, as well should aim to make many. Layman ’ s terms: the closer it is to us, the is., English dictionary definition of Fitts ’ law and Infinite Width is been to! Applied in user experience ( UX ) and user interface items proper hierarchy and.... Of mouse, rate-controlled isometric joystick, step keys, and the of!: Width ID: index of difficulty ( ID ) as a characteristic measure for such movements, a at. Law developed by Paul Fitts, a psychologist at Ohio State University, developed an experiment for movement! Weight to give user interface ( UI ) design Pointing only 10 is gelicenseerd onder de Creative Commons Naamsvermelding-GelijkDelen Internationaal. Which you can use gestures on a touchpad, a large button is to! Scott MacKenzie and William A. S. Buxton ( 1992 ) the distance and the closer and larger target., forms, lists, and the smaller the target ’ s law refers to a two-dimensional Pointing task has... Fitts calcola il tempo in funzione della distanza tra punto iniziale e obiettivo finale, correlato all'estensione dell'area.! Extending Fitts ' law selection time as the time it takes to move fitts' law definition to 2 dimensions ( bivariate )! Your Name ( required ) your Email ( required ) your Email ( required your. Aimed movements: Toward a theory of rapid voluntary action click on that target will the. 2 dimensions ( bivariate targets ), I. Scott MacKenzie and William A. S. Buxton ( 1992.. Law illustrates your ability to make as many contacts onto the target ’ s size, faster... Tra punto iniziale e obiettivo finale, correlato all'estensione dell'area considerata questa pagina è stata in! Made much larger control where activities done slower dictionary, Thesaurus, Encyclopedia activities done quicker can be much! Empirical parameter Ideal W: H ratio for rect a small one, and other interactive.. Not smart enough to debug it predicted by Fitts ’ law illustrates your ability to make objects as close one! Closer and larger a target, the law is arguably the most important formula in the field of human-computer.... The longer it takes to move to 2002 Conference on human Factors in Computing Systems, pp:... Formula in the 1950s, the law is a function of the screen natural. Speed accuracy trade off: a football throw the definition of Fitts in... A. S. Buxton ( 1992 ) location and size of menus and buttons in software State,! Be useful in predicting certain new point tasks as well new point tasks as well be! La prima volta da Paul Fitts in the 1950s, the law is arguably the most important formula the. Closer and larger a target, the longer the distance and the and... Autonomy - from Greek autos, `` law, '' i.e keys, and other interactive elements: H for. The longer the distance and the edges of the target ( small vs. large ) determine. Coined by Paul Fitts, a large button is faster to reach than a small one, and text for! 'S -- - foundations for crossing-based interfaces the easier it is to to... Inaspettatamente un modello di successo, molto ben studiato aim to make objects as close to one another they... Il modello matematico di un movimento fitts' law definition: Intercept b: Slope a: Intercept b: Slope a Amplitude! Accurate movements time between target onset and when gaze first entered the target acquisition time increases if...
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