<i>In-Situ</i> Immersive Analytics Authoring Through Ergonomic Keyboard Support

Immersive analytics uses augmented reality (AR) to integrate data analysis and authoring within physical environments. However, extensive text entry required for immersive analytics authoring remains a fundamental challenge in AR, as popular natural user interfaces often hinder expressive input. We present the Body-Supported Keyboard (BSK), an ergonomic system that allows the mobile use of Bluetooth keyboards in AR. We conducted a study with 20 participants to compare the BSK with a standing desk during text transcription and a mobile AR scenario. We found slightly higher error rates but comparable task completion times. Participants reported comfort improvements during mobile use and positive usability ratings (mean SUS = 74.5). With BSK, users move freely and maintain stable postures while authoring in AR. The findings provide evidence that body-supported input can enhance expressive and ergonomic workflows in immersive analytics and emphasize the importance of comfort and mobility in the design of AR authoring tools.