Philipp Janssen

Easy to Draw, but Hard to Trace?: On the Observability of Grid-based (Un)lock Patterns

Heinrich Hußmann, Alexander De Luca, Emanuel von Zezschwitz, 2015, CHI.

Should I Interrupt or Not?: Understanding Interruptions in Head-Mounted Display Settings

Florian Alt, Ceenu George, Philipp Janssen, 2019, Conference on Designing Interactive Systems.