The Potential of Dwell-Free Eye-Typing for Fast Assistive Gaze Communication PO Kristensson and K Vertanen ACM 2012.

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Presentation transcript:

The Potential of Dwell-Free Eye-Typing for Fast Assistive Gaze Communication PO Kristensson and K Vertanen ACM 2012

Outline Hands-free typing Traditional dwell-based gaze typing Dasher (adaptive dwell-time) A dwell-free method Brief project update

Hands-free typing voice EEG eye

Gaze/eye typing Typically keyboard-based Require event demarcation, which is slow: –dwell-time (most common) –special region –special gesture Appear to have approached limit: ~20 wpm Fastest traditional eye-typing method (Majaranta, 2009): –allows user to adjust dwell-time –19.8 wpm, 282 ms dwell-time

Dasher Adaptive dwell-time No explicit demarcation wpm

Dasher

Muscle memory impossible

potential of dwell-free methods?

"Ideal" performance 8 participants (4m, 4f) Tobii P10, 40Hz, 0.5° QWERTY keyboard, 15 x 6 cm 500 phrases, word = 5 chars 5 x 10 min sessions Read phrase, press SPACE, start Must be within 1 key of correct letter before moving on

Results wpm by last session (mean 46 wpm) counted spaces in wpm (~29-37 wpm w/o) ~50% of the time, participants never went inside actual key

To dwell or not to dwell

Future work Memorize beforehand Allow missed letters Incorporate error correction

Summary Current dwell-based methods seem to have peaked Dwell-free methods could speed up by 2x These speeds not theoretically achievable with dwell-based methods