Dasher is one of the best known inventions in the area of text entry in recent years. It can be used with many input devices, but studies on user performance with it are still scarce. We ran a longitudinal study where 12 participants transcribed Finnish text with Dasher in ten 15-minute sessions using a Tobii 1750 eye tracker as a pointing device. The mean text entry rate was 2.5 wpm during the first session and 17.3 wpm during the tenth session. Our results show that very high text entry rates can be achieved with eye-operated Dasher, but only after several hours of training.

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(C)overt attention and visual speller design in an ERP-based brain-computer interface

Movement of eye from one place to another

The purpose of the current investigation was to determine which of three keyboard layouts is the most efficient for typical as well as neurologically-compromised first-time users of eye gaze access. All participants (16 neurotypical, 16 amyotrophic lateral sclerosis; ALS) demonstrated hearing and reading abilities sufficient to interact with all stimuli. Participants from each group answered questions about technology use and vision status. Participants with ALS also noted date of first disease-related symptoms, initial symptoms, and date of diagnosis. Once a speech generating device (SGD) with eye gaze access capabilities was calibrated to an individual participant’s eyes, s/he practiced utilizing the access method. Then all participants spelled word, phrases, and a longer phrase on each of three keyboard layouts (i.e., standard QWERTY, alphabetic with highlighted vowels, frequency of occurrence). Accuracy of response, error rate, and eye typing time were determined for each participant for all layouts. Results indicated that both groups shared equivalent experience with technology. Additionally, neurotypical adults typed more accurately than the ALS group on all

two systems with ALS patients Sebastian Pannasch