Presentation of our full paper at the CHI conference on Human Factors in Computing Systems, San Jose, 2016.
Abstract:
This paper revisits the present understanding of typing, which originates mostly from studies of trained typists using the ten- finger touch typing system. Our goal is to characterise the majority of present-day users who are untrained and employ diverse, self-taught techniques. In a transcription task, we compare self-taught typists and those that took a touch typing course. We report several differences in performance, gaze deployment and movement strategies. The most surprising finding is that self-taught typists can achieve performance levels comparable with touch typists, even when using fewer fingers. Motion capture data exposes 3 predictors of high performance: 1) unambiguous mapping (a letter is consistently pressed by the same finger), 2) active preparation of upcoming keystrokes, and 3) minimal global hand motion. We release an extensive dataset on everyday typing behavior.
More information about the work: http://userinterfaces.aalto.fi/how-we-type/
More than Just Lines on a Map: Best Practices for U.S Bike Routes
How we type: Movement Strategies and Performance in Everyday typing
1. How we type
Movement Strategies and Performance in Everyday Typing
Anna Maria Feit, Daryl Weir, Antti Oulasvirta
Aalto University, Helsinki, Finland
8. Professional typists from 1920s – 1980s:
• Avg. speed: 75 wpm
[e.g. Grudin, 1983]
• Random letters typed less than half as
fast
[e.g. Shaffer, 1968]
• Hand alternation: 30-60 ms faster
[e.g. Salthouse, 1984]
What we do knowWhat we do know
9. Basis for Models and Theories
• Central control model [Terzuolo and Viviana, 1980]
• Mathematical model [Hiraga, 1980]
• Simulation model [Rumelhart and Norman,1982]
• Heuristic model [Salthouse, 1986]
• TYPIST model [John, 1996]
• Queuing Network Model [Wu and Liu, 2008]
13. 30 Typists (17 female)
Age: 20 – 55
Performance: 34 -79 wpm
Language:
English or Finnish
14. 13 learned the touch
typing system
“Touch typists”
17 never took a typing
course
“Non-touch typists”
15. Sentences
Voitko jo paremmin? Are you feeling better?
Random
vrphme vrphme
Mix
Voitko jo vrphme paremmin? Are you vrphme feeling better?
Task and Stimulus
