Key findings from consumer research
Along with simulation experiments, we carried out consumer research to check the effectiveness of SpeakFaster. The research concerned each non-AAC and ALS eye-gaze customers, as a result of taking part in such research can tax the already-limited time and power of people with ALS that talk with eye-gaze alone. The 19 non-AAC members, typing on a cellular machine by hand, gave us useful details about the benefit of use of the system and allowed us to quantitatively validate positive factors in keystroke charges, supporting our outcomes from two people with ALS who solely use eye-gaze typing to speak.
The examine itself has two phases, a scripted and an unscripted section. Within the scripted section the members play the function of one of many folks in a two-person dialog, the place the content material that the participant must kind reveals up on display screen as textual content. Within the unscripted section the participant engages in 5- or 6-turn quick dialogues with the experimenter the place simply the dialog opener is predetermined, e.g., “What sort of music do you take heed to?” and the remaining is spontaneous. Previous to the examine, members watched a video demo and bought a small apply session of 5 conversations to familiarize themselves with the interface.
To evaluate the SpeakFaster interface, we measured motor motion financial savings (keystrokes saved in comparison with the complete set of characters to be typed), practicality (typing pace in phrases per minute), and learnability of the SpeakFaster UI (how a lot apply it takes for folks to get snug utilizing the system).
Throughout all research, SpeakFaster demonstrated substantial keystroke financial savings in comparison with conventional baselines for each eye-gaze customers and non-AAC members with each scripted and unscripted dialogs. For non-AAC customers, SpeakFaster permits for 56% (p = 8.0×10-11) keystrokes financial savings within the scripted state of affairs and 45% (p = 5.5×10−7) financial savings charge within the unscripted state of affairs. SpeakFaster additionally enabled vital keystroke financial savings within the scripted section for our ALS eye-gaze tester.