RSVP on the Go - Implicit Reading Support on Smart Watches Through Eye Tracking

While smartwatches have become common for mobile interaction, one of their main limitation is the limited screen size. To facilitate reading activities despite these limitations, reading with Rapid Serial Visual Presentation (RSVP) has been shown to be feasible. However, when text is presented in rapid sequence, single words are easily missed due to blinking or briefly glancing up from the screen. This gets worse the more the reader is engaged in a secondary task, such as walking. To give implicit control over the reading flow we combined an RSVP reading application on a smartwatch with a head-worn eye tracker. When the reading flow is briefly interrupted, the text presentation automatically pauses or backtracks. In a user study with 15 participants we show that using eye tracking in combination with RSVP increases users' comprehension compared to a touch-based Ul to control the text presentation. We argue that eye tracking will be a valuable extension for future smartwatch interaction.