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I. Scott MacKenzie
Ian Scott MacKenzie
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- affiliation: York University, Toronto, Canada
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2020 – today
- 2023
- [j27]Vera Remizova
, Antti Sand
, I. Scott MacKenzie
, Oleg Spakov
, Katariina Nyyssönen
, Ismo Rakkolainen
, Anneli Kylliäinen
, Veikko Surakka
, Yulia Gizatdinova
:
Mid-Air Gestural Interaction with a Large Fogscreen. Multimodal Technol. Interact. 7(7): 63 (2023) - [c133]Dev Raj Lamichhane
, Janet C. Read
, I. Scott MacKenzie
:
When Children Chat with Machine Translated Text: Problems, Possibilities, Potential. IDC 2023: 198-209 - [c132]Saba Fallah
, I. Scott MacKenzie
:
H4VR: One-handed Gesture-based Text Entry in Virtual Reality Using a Four-key Keyboard. CHI Extended Abstracts 2023: 151:1-151:7 - [c131]Ian Scott MacKenzie
, Janet C. Read
, Matthew Horton
:
Empirical Research Methods for Human-Computer Interaction. CHI Extended Abstracts 2023: 536:1-536:3 - 2022
- [j26]Tafadzwa Joseph Dube
, Yuan Ren
, Hannah Limerick
, I. Scott MacKenzie
, Ahmed Sabbir Arif
:
Push, Tap, Dwell, and Pinch: Evaluation of Four Mid-air Selection Methods Augmented with Ultrasonic Haptic Feedback. Proc. ACM Hum. Comput. Interact. 6(ISS): 207-225 (2022) - [c130]Baosheng James Hou, John Paulin Hansen
, Cihan Uyanik
, Per Bækgaard
, Sadasivan Puthusserypady, Jacopo M. Araujo, I. Scott MacKenzie:
Feasibility of a Device for Gaze Interaction by Visually-Evoked Brain Signals. ETRA 2022: 62:1-62:7 - [c129]Elias Bestard Lorigados, I. Scott MacKenzie, Melanie Baljko
:
Movement Control Methods for Mobile Devices: An Empirical Study of Displacement Interfaces. HCI (33) 2022: 3-21 - [c128]Mathieu Raynal, Georges Badr, I. Scott MacKenzie:
DESSK: Description Space for Soft Keyboards. HCI (2) 2022: 109-125 - [c127]Mathieu Raynal, I. Scott MacKenzie:
TBS3: Two-Bar Single-Switch Scanning for Target Selection. ICCHP-AAATE (1) 2022: 338-346 - 2021
- [c126]Saurabh Garg, I. Scott MacKenzie:
Comparison of Touch and Touchless Zoom Control Methods for Single-Handed Mobile Interaction. AHFE (7) 2021: 71-78 - [c125]Saurabh Garg, I. Scott MacKenzie:
Fingerprint Scroll: Comparison of Touchless and Touch-Based Scroll Navigation Methods. INTERACT (3) 2021: 139-150 - [c124]Janet C. Read, Eunice Ratna Sari, I. Scott MacKenzie, Josh Adi Tedjasaputra:
Words, Worlds and Freedom - Insights from School Students in Indonesia and UK. INTERACT (4) 2021: 361-370 - 2020
- [c123]Chandan Kumar, Ramin Hedeshy
, I. Scott MacKenzie, Steffen Staab:
TAGSwipe: Touch Assisted Gaze Swipe for Text Entry. CHI 2020: 1-12 - [c122]Korok Sengupta
, Sabin Bhattarai, Sayan Sarcar, I. Scott MacKenzie, Steffen Staab
:
Leveraging Error Correction in Voice-based Text Entry by Talk-and-Gaze. CHI 2020: 1-11 - [c121]Baosheng James Hou, Per Bækgaard
, I. Scott MacKenzie, John Paulin Hansen
, Sadasivan Puthusserypady:
GIMIS: Gaze Input with Motor Imagery Selection. ETRA Adjunct 2020: 18:1-18:10 - [c120]Mehedi Hassan, John J. Magee, I. Scott MacKenzie:
Evaluating Hands-On and Hands-Free Input Methods for a Simple Game. HCI (8) 2020: 124-142 - [c119]Linghui Ye, Frode Eika Sandnes
, I. Scott MacKenzie:
QB-Gest: Qwerty Bimanual Gestural Input for Eyes-Free Smartphone Text Input. HCI (8) 2020: 223-242 - [c118]Antti Sand, Vera Remizova
, I. Scott MacKenzie, Oleg Spakov
, Katariina Nieminen, Ismo Rakkolainen, Anneli Kylliäinen
, Veikko Surakka, Julia Kuosmanen:
Tactile feedback on mid-air gestural interaction with a large fogscreen. Mindtrek 2020: 161-164
2010 – 2019
- 2019
- [c117]Brendan Cassidy, Janet C. Read, I. Scott MacKenzie:
An Evaluation of Radar Metaphors for Providing Directional Stimuli Using Non-Verbal Sound. CHI 2019: 59 - [c116]I. Scott MacKenzie, Steven J. Castellucci:
Empirical Research Methods for Human-Computer Interaction. CHI Extended Abstracts 2019 - [c115]Per Bækgaard
, John Paulin Hansen
, Katsumi Minakata
, I. Scott MacKenzie:
A Fitts' law study of pupil dilations in a head-mounted display. ETRA 2019: 32:1-32:5 - [c114]Katsumi Minakata
, John Paulin Hansen
, I. Scott MacKenzie, Per Bækgaard
, Vijay Rajanna:
Pointing by gaze, head, and foot in a head-mounted display. ETRA 2019: 69:1-69:9 - [c113]Abdelrahman Abdelhamed, I. Scott MacKenzie, Michael S. Brown:
MarkWhite: An Improved Interactive White-Balance Method for Smartphone Cameras. Graphics Interface 2019: 24:1-24:8 - [c112]Mehedi Hassan, John J. Magee, I. Scott MacKenzie:
A Fitts' Law Evaluation of Hands-Free and Hands-On Input on a Laptop Computer. HCI (8) 2019: 234-249 - [c111]Chandan Kumar, Daniyal Akbari, Raphael Menges, I. Scott MacKenzie, Steffen Staab
:
TouchGazePath: Multimodal Interaction with Touch and Gaze Path for Secure Yet Efficient PIN Entry. ICMI 2019: 329-338 - [c110]Brendan Cassidy, Janet C. Read, I. Scott MacKenzie:
FittsFarm: Comparing Children's Drag-and-Drop Performance Using Finger and Stylus Input on Tablets. INTERACT (3) 2019: 656-668 - [c109]Steven J. Castellucci, I. Scott MacKenzie, Mudit Misra, Laxmi Pandey, Ahmed Sabbir Arif
:
TiltWriter: design and evaluation of a no-touch tilt-based text entry method for handheld devices. MUM 2019: 7:1-7:8 - 2018
- [j25]Margaree Peacocke, Robert J. Teather, Jacques Carette
, I. Scott MacKenzie, Victoria McArthur:
An empirical comparison of first-person shooter information displays: HUDs, diegetic displays, and spatial representations. Entertain. Comput. 26: 41-58 (2018) - [j24]Maria Francesca Roig-Maimó
, I. Scott MacKenzie, Cristina Manresa-Yee
, Javier Varona
:
Head-tracking interfaces on mobile devices: Evaluation using Fitts' law and a new multi-directional corner task for small displays. Int. J. Hum. Comput. Stud. 112: 1-15 (2018) - [j23]Maria Francesca Roig-Maimó, Ian Scott MacKenzie, Cristina Manresa-Yee
, Javier Varona Gómez
:
Ley de Fitts: Sobre el Cálculo del Rendimiento y Tareas No ISO. Rev. Colomb. de Computación 19(1): 7-28 (2018) - [c108]I. Scott MacKenzie, Steven J. Castellucci:
Empirical Research Methods for Human-Computer Interaction. CHI Extended Abstracts 2018 - [c107]John Paulin Hansen
, Vijay Rajanna, I. Scott MacKenzie, Per Bækgaard
:
A Fitts' law study of click and dwell interaction by gaze, head and mouse with a head-mounted display. COGAIN@ETRA 2018: 7:1-7:5 - [c106]Sean DeLong, I. Scott MacKenzie:
Evaluating Devices for Object Rotation in 3D. HCI (7) 2018: 160-177 - [c105]Manoel Farhad, I. Scott MacKenzie:
Evaluating Tap-and-Drag: A Single-Handed Zooming Method. HCI (3) 2018: 233-246 - [c104]Mahdieh Abbaszadegan, Sohrab Yaghoubi, I. Scott MacKenzie:
TrackMaze: A Comparison of Head-Tracking, Eye-Tracking, and Tilt as Input Methods for Mobile Games. HCI (3) 2018: 393-405 - [c103]Sibu Varghese Jacob, I. Scott MacKenzie:
Comparison of Feedback Modes for the Visually Impaired: Vibration vs. Audio. HCI (7) 2018: 420-432 - 2017
- [j22]Robert J. Teather, Andrew Roth, I. Scott MacKenzie:
Tilt-Touch synergy: Input control for "dual-analog" style mobile games. Entertain. Comput. 21: 33-43 (2017) - [c102]Thomas S. Young, Robert J. Teather, I. Scott MacKenzie:
An arm-mounted inertial controller for 6DOF input: Design and evaluation. 3DUI 2017: 26-35 - [c101]Chris T. Waddington
, I. Scott MacKenzie, Janet C. Read, Matthew Horton:
Comparing a Scanning Ambiguous Keyboard to the On-screen QWERTY Keyboard. BCS HCI 2017 - [c100]Justin Cuaresma, I. Scott MacKenzie:
FittsFace: Exploring Navigation and Selection Methods for Facial Tracking. HCI (8) 2017: 403-416 - [c99]Maria Francesca Roig-Maimó
, I. Scott MacKenzie, Cristina Manresa-Yee
, Javier Varona
:
Evaluating fitts' law performance with a non-ISO task. Interacción 2017: 5:1-5:8 - 2016
- [c98]I. Scott MacKenzie, Steven J. Castellucci:
Empirical Research Methods for Human-Computer Interaction. CHI Extended Abstracts 2016: 996-999 - [c97]Tomoki Shibata, Daniel Afergan, Danielle Kong, Beste F. Yuksel, I. Scott MacKenzie, Robert J. K. Jacob:
Text Entry for Ultra-Small Touchscreens Using a Fixed Cursor and Movable Keyboard. CHI Extended Abstracts 2016: 3770-3773 - [c96]Maria Francesca Roig-Maimó
, Cristina Manresa-Yee
, Javier Varona
, I. Scott MacKenzie:
Evaluation of a Mobile Head-Tracker Interface for Accessibility. ICCHP (2) 2016: 449-456 - [c95]Torsten Felzer, Ian Scott MacKenzie, John J. Magee:
Comparison of Two Methods to Control the Mouse Using a Keypad. ICCHP (2) 2016: 511-518 - [c94]Tomoki Shibata, Daniel Afergan, Danielle Kong, Beste F. Yuksel, I. Scott MacKenzie, Robert J. K. Jacob:
DriftBoard: A Panning-Based Text Entry Technique for Ultra-Small Touchscreens. UIST 2016: 575-582 - 2015
- [c93]Margaree Peacocke, Robert J. Teather, Jacques Carette, I. Scott MacKenzie:
Evaluating the effectiveness of HUDs and diegetic ammo displays in first-person shooter games. GEM 2015: 1-8 - [c92]I. Scott MacKenzie:
User studies and usability evaluations: from research to products. Graphics Interface 2015: 1-8 - [c91]John J. Magee, Torsten Felzer, I. Scott MacKenzie:
Camera Mouse + ClickerAID: Dwell vs. Single-Muscle Click Actuation in Mouse-Replacement Interfaces. HCI (7) 2015: 74-84 - [c90]I. Scott MacKenzie:
Fitts' Throughput and the Remarkable Case of Touch-Based Target Selection. HCI (2) 2015: 238-249 - 2014
- [c89]I. Scott MacKenzie, Steven J. Castellucci:
Empirical research methods for human-computer interaction. CHI Extended Abstracts 2014: 1013-1014 - [c88]John Paulin Hansen
, Alexandre Alapetite
, I. Scott MacKenzie, Emilie Møllenbach:
The use of gaze to control drones. ETRA 2014: 27-34 - [c87]Catalina I. Constantin, I. Scott MacKenzie:
Tilt-controlled mobile games: Velocity-control vs. position-control. GEM 2014: 1-7 - [c86]Justin Cuaresma, I. Scott MacKenzie:
A comparison between tilt-input and facial tracking as input methods for mobile games. GEM 2014: 1-7 - [c85]Robert J. Teather, I. Scott MacKenzie:
Position vs. velocity control for tilt-based interaction. Graphics Interface 2014: 51-58 - [c84]Torsten Felzer, I. Scott MacKenzie, Stephan Rinderknecht:
Applying Small-Keyboard Computer Control to the Real World. ICCHP (2) 2014: 180-187 - [c83]Mathieu Raynal
, I. Scott MacKenzie, Bruno Merlin:
Semantic Keyboard: Fast Movements between Keys of a Soft Keyboard. ICCHP (2) 2014: 195-202 - [c82]Robert J. Teather, I. Scott MacKenzie:
Comparing Order of Control for Tilt and Touch Games. IE 2014: 5:1-5:10 - 2013
- [j21]Javier Quevedo-Fernández, J.-B. O. S. Martens, John Paulin Hansen
, Wusheng Wang, Irina Shklovski, Jari Varsaluoma, Ville Kentta, Alexandre Alapetite, I. Scott MacKenzie:
Demo hour. Interactions 20(5): 8-9 (2013) - [c81]Daniel Fitton, I. Scott MacKenzie, Janet C. Read, Matthew Horton:
Exploring tilt-based text input for mobile devices with teenagers. BCS HCI 2013: 25 - [c80]Torsten Felzer, I. Scott MacKenzie, Stephan Rinderknecht:
OnScreenDualScribe: A Computer Operation Tool for Users with a Neuromuscular Disease. HCI (6) 2013: 474-483 - 2012
- [c79]I. Scott MacKenzie, Steven J. Castellucci:
Reducing visual demand for gestural text input on touchscreen devices. CHI Extended Abstracts 2012: 2585-2590 - [c78]I. Scott MacKenzie:
Modeling Text Input for Single-Switch Scanning. ICCHP (2) 2012: 423-430 - [c77]Torsten Felzer, I. Scott MacKenzie, Stephan Rinderknecht:
DualScribe: A Keyboard Replacement for Those with Friedreich's Ataxia and Related Diseases. ICCHP (2) 2012: 431-438 - [c76]Bartosz Bajer, I. Scott MacKenzie, Melanie Baljko
:
Huffman Base-4 Text Entry Glove (H4 TEG). ISWC 2012: 41-47 - [c75]I. Scott MacKenzie, Robert J. Teather:
FittsTilt: the application of Fitts' law to tilt-based interaction. NordiCHI 2012: 568-577 - [c74]Alexandre Alapetite
, John Paulin Hansen
, I. Scott MacKenzie:
Demo of gaze controlled flying. NordiCHI 2012: 773-774 - 2011
- [j20]I. Scott MacKenzie, Behrooz Ashtiani:
BlinkWrite: efficient text entry using eye blinks. Univers. Access Inf. Soc. 10(1): 69-80 (2011) - [c73]Steven J. Castellucci, I. Scott MacKenzie:
Gathering text entry metrics on android devices. CHI Extended Abstracts 2011: 1507-1512 - [c72]Adam J. Sporka, Torsten Felzer, Sri Hastuti Kurniawan, Ondrej Polácek, Paul Haiduk, I. Scott MacKenzie:
CHANTI: predictive text entry using non-verbal vocal input. CHI 2011: 2463-2472 - [c71]I. Scott MacKenzie, R. William Soukoreff, Joanna Helga:
1 thumb, 4 buttons, 20 words per minute: design and evaluation of H4-writer. UIST 2011: 471-480 - 2010
- [j19]I. Scott MacKenzie, Torsten Felzer:
SAK: Scanning ambiguous keyboard for efficient one-key text entry. ACM Trans. Comput. Hum. Interact. 17(3): 11:1-11:39 (2010) - [c70]I. Scott MacKenzie:
An eye on input: research challenges in using the eye for computer input control. ETRA 2010: 11-12 - [c69]Behrooz Ashtiani, I. Scott MacKenzie:
BlinkWrite2: an improved text entry method using eye blinks. ETRA 2010: 339-345 - [c68]Daniel Natapov, I. Scott MacKenzie:
Gameplay evaluation of the trackball controller. Future Play 2010: 167-174 - [c67]Daniel Natapov, I. Scott MacKenzie:
The trackball controller: improving the analog stick. Future Play 2010: 175-182 - [c66]Rados Javanovic, I. Scott MacKenzie:
MarkerMouse: Mouse Cursor Control Using a Head-Mounted Marker. ICCHP (2) 2010: 49-56 - [c65]Torsten Felzer, I. Scott MacKenzie, Philipp Beckerle
, Stephan Rinderknecht:
Qanti: A Software Tool for Quick Ambiguous Non-standard Text Input. ICCHP (2) 2010: 128-135 - [c64]Hussain Tinwala, I. Scott MacKenzie:
Eyes-free text entry with error correction on touchscreen mobile devices. NordiCHI 2010: 511-520
2000 – 2009
- 2009
- [j18]Dan Beamish, Shabana Bhatti, C. Scott Chubbs, I. Scott MacKenzie, Jianhong Wu, Zhujun Jing:
Estimation of psychomotor delay from the Fitts' law coefficients. Biol. Cybern. 101(4): 279-296 (2009) - [c63]Robert J. Teather, Andriy Pavlovych, Wolfgang Stürzlinger
, I. Scott MacKenzie:
Effects of tracking technology, latency, and spatial jitter on object movement. 3DUI 2009: 43-50 - [c62]I. Scott MacKenzie:
The one-key challenge: searching for a fast one-key text entry method. ASSETS 2009: 91-98 - [c61]I. Scott MacKenzie:
Citedness, uncitedness, and the murky world between. CHI Extended Abstracts 2009: 2545-2554 - [c60]Steven J. Castellucci, I. Scott MacKenzie:
TnToolkit: a design and analysis tool for ambiguous, QWERTY, and on-screen keypads. EICS 2009: 55-60 - [c59]Victoria McArthur, Steven J. Castellucci, I. Scott MacKenzie:
An empirical comparison of "wiimote" gun attachments for pointing tasks. EICS 2009: 203-208 - [c58]Daniel Natapov, Steven J. Castellucci, I. Scott MacKenzie:
ISO 9241-9 evaluation of video game controllers. Graphics Interface 2009: 223-230 - [c57]R. William Soukoreff, I. Scott MacKenzie:
An Informatic Rationale for the Speed-Accuracy Trade-Off. SMC 2009: 2890-2896 - 2008
- [c56]Steven J. Castellucci, I. Scott MacKenzie:
Graffiti vs. unistrokes: an empirical comparison. CHI 2008: 305-308 - [c55]Jacob O. Wobbrock, Edward Cutrell, Susumu Harada, I. Scott MacKenzie:
An error model for pointing based on Fitts' law. CHI 2008: 1613-1622 - [c54]I. Scott MacKenzie, Poika Isokoski
:
Fitts' throughput and the speed-accuracy tradeoff. CHI 2008: 1633-1636 - [c53]Hussain Tinwala, I. Scott MacKenzie:
Letterscroll: text entry using a wheel for visually impaired users. CHI Extended Abstracts 2008: 3153-3158 - [c52]Steven J. Castellucci, I. Scott MacKenzie:
Unigest: text entry using three degrees of motion. CHI Extended Abstracts 2008: 3549-3554 - [c51]I. Scott MacKenzie, Xuang Zhang:
Eye typing using word and letter prediction and a fixation algorithm. ETRA 2008: 55-58 - [c50]Ehsan Fazl Ersi
, I. Scott MacKenzie, John K. Tsotsos:
slab: smart labeling of family photos through an interactive interface. JCDL 2008: 351-354 - [c49]Jun Gong, Peter Tarasewich, I. Scott MacKenzie:
Improved word list ordering for text entry on ambiguous keypads. NordiCHI 2008: 152-161 - 2007
- [c48]Akiyo Kano, Janet C. Read, Alan J. Dix, I. Scott MacKenzie:
ExpECT: an expanded error categorisation method for text input. BCS HCI (1) 2007: 147-156 - [c47]I. Scott MacKenzie, Janet C. Read:
Using paper mockups for evaluating soft keyboard layouts. CASCON 2007: 98-108 - [c46]Jun Gong, Peter Tarasewich, Carole D. Hafner, I. Scott MacKenzie:
Improving dictionary-based disambiguation text entry method accuracy. CHI Extended Abstracts 2007: 2387-2392 - [c45]Xuan Zhang, I. Scott MacKenzie:
Evaluating Eye Tracking with ISO 9241 - Part 9. HCI (3) 2007: 779-788 - 2006
- [j17]Dan Beamish, I. Scott MacKenzie, Jianhong Wu:
Speed-accuracy trade-off in planned arm movements with delayed feedback. Neural Networks 19(5): 582-599 (2006) - [j16]Päivi Majaranta, I. Scott MacKenzie, Anne Aula, Kari-Jouko Räihä:
Effects of feedback and dwell time on eye typing speed and accuracy. Univers. Access Inf. Soc. 5(2): 199-208 (2006) - [c44]Darius Miniotas, Oleg Spakov, Ivan Tugoy, I. Scott MacKenzie:
Speech-augmented eye gaze interaction with small closely spaced targets. ETRA 2006: 67-72 - [c43]Chris Klochek, I. Scott MacKenzie:
Performance measures of game controllers in a three-dimensional environment. Graphics Interface 2006: 73-79 - [c42]I. Scott MacKenzie, Javier Chen, Aleks Oniszczak:
Unipad: single stroke text entry with language-based acceleration. NordiCHI 2006: 78-85 - 2005
- [c41]Sergey Kulikov, I. Scott MacKenzie, Wolfgang Stürzlinger
:
Measuring the effective parameters of steering motions. CHI Extended Abstracts 2005: 1569-1572 - [i1]I. Scott MacKenzie:
Attention Demands in Text Entry Interfaces. Efficient Text Entry 2005 - 2004
- [j15]R. William Soukoreff, I. Scott MacKenzie:
Towards a standard for pointing device evaluation, perspectives on 27 years of Fitts' law research in HCI. Int. J. Hum. Comput. Stud. 61(6): 751-789 (2004) - [c40]Darius Miniotas, Oleg Spakov, I. Scott MacKenzie:
Eye gaze interaction with expanding targets. CHI Extended Abstracts 2004: 1255-1258 - [c39]R. William Soukoreff, I. Scott MacKenzie:
Recent developments in text-entry error rate measurement. CHI Extended Abstracts 2004: 1425-1428 - [c38]Aleks Oniszczak, I. Scott MacKenzie:
A comparison of two input methods for keypads on mobile devices. NordiCHI 2004: 101-104 - 2003
- [c37]R. William Soukoreff, I. Scott MacKenzie:
Metrics for text entry research: an evaluation of MSD and KSPC, and a new unified error metric. CHI 2003: 113-120 - [c36]Poika Isokoski
, I. Scott MacKenzie:
Combined model for text entry rate development. CHI Extended Abstracts 2003: 752-753 - [c35]I. Scott MacKenzie, R. William Soukoreff:
Phrase sets for evaluating text entry techniques. CHI Extended Abstracts 2003: 754-755 - [c34]I. Scott MacKenzie, R. William Soukoreff:
Card, English, and Burr (1978): 25 years later. CHI Extended Abstracts 2003: 760-761 - [c33]Päivi Majaranta
, I. Scott MacKenzie, Anne Aula, Kari-Jouko Räihä
:
Auditory and visual feedback during eye typing. CHI Extended Abstracts 2003: 766-767 - [c32]R. William Soukoreff, I. Scott MacKenzie:
Input-based Language Modelling in the Design of High Performance Text Input Techniques. Graphics Interface 2003: 89-96 - 2002
- [j14]I. Scott MacKenzie:
Introduction to This Special Issue on Text Entry for Mobile Computing. Hum. Comput. Interact. 17(2-3): 141-145 (2002) - [j13]I. Scott MacKenzie, R. William Soukoreff:
Text Entry for Mobile Computing: Models and Methods, Theory and Practice. Hum. Comput. Interact. 17(2-3): 147-198 (2002) - [c31]I. Scott MacKenzie, R. William Soukoreff:
A Model of Two-Thumb Text Entry. Graphics Interface 2002: 117-124 - [c30]I. Scott MacKenzie:
KSPC (Keystrokes per Character) as a Characteristic of Text Entry Techniques. Mobile HCI 2002: 195-210 - [c29]I. Scott MacKenzie:
Mobile text entry using three keys. NordiCHI 2002: 27-34 - [c28]I. Scott MacKenzie, R. William Soukoreff:
A character-level error analysis technique for evaluating text entry methods. NordiCHI 2002: 243-246