TY - CHAP U1 - Konferenzveröffentlichung A1 - Kruijff, Ernst A1 - Biswas, Saugata A1 - Trepkowski, Christina A1 - Maiero, Jens A1 - Ghinea, George A1 - Stuerzlinger, Wolfgang T1 - Multilayer Haptic Feedback for Pen-Based Tablet Interaction T2 - CHI '19: Proceedings of the 2019 CHI, Conference on Human Factors in Computing Systems, May 04-09, 2019, Glasgow, Scotland, UK N2 - We present a novel, multilayer interaction approach that enables state transitions between spatially above-screen and 2D on-screen feedback layers. This approach supports the exploration of haptic features that are hard to simulate using rigid 2D screens. We accomplish this by adding a haptic layer above the screen that can be actuated and interacted with (pressed on) while the user interacts with on-screen content using pen input. The haptic layer provides variable firmness and contour feedback, while its membrane functionality affords additional tactile cues like texture feedback. Through two user studies, we look at how users can use the layer in haptic exploration tasks, showing that users can discriminate well between different firmness levels, and can perceive object contour characteristics. Demonstrated also through an art application, the results show the potential of multilayer feedback to extend on-screen feedback with additional widget, tool and surface properties, and for user guidance. KW - Multilayer interaction KW - pen interaction KW - haptic feedback SN - 978-1-4503-5970-2 SB - 978-1-4503-5970-2 U6 - https://doi.org/10.1145/3290605.3300373 DO - https://doi.org/10.1145/3290605.3300373 SP - 1 EP - 14 PB - Association for Computing Machinery CY - New York, NY, United States ER -