A lot of efforts have been directed to enriching human-computer interaction to make the user experiencemore pleasing or efficient. In this paper, we briefly present work in the fields of subliminal perception and affective computing, before we outline a new approach to add analog communication channels to the human-computer interaction experience. In this approach, in addition to symbolic predefined mappings of input to output, a subliminal feedback loop is used that provides feedback in evolutionary subliminal steps. In two studies involving concentration-intensive games, we investigated the impact of this approach. In a first study evolutionary feedback loops adjusted the user interface of a memory game whereas in the second study the lighting of the test room was adjusted dynamically. The results show that in settings with an evolutionary feedback loop test participants were able to reach significantly higher scores compared to the static counterparts. Finally, we discuss the impact that such subliminally working applications might have on the user's acceptance.

/pdf/benefits-of-subliminal-feedback-loops-in-human-computer-36ihovkypc.pdf

Benefits of subliminal feedback loops in human-computer interaction

A Software-Engineering Approach to Multi-Modal Interaction

Weltweit wird an der Entwicklung von Technologien für zukünftige interaktive Systeme gearbeitet, die neue Möglichkeiten bieten, Usability-Probleme zu adressieren. In diesem Beitrag werden einige aktuelle Forschungsansätze des Fraunhofer-Instituts für Graphische Datenverarbeitung zu kontinuierlichen und nichtsymbolischen Interaktionsparadigmen vorgestellt und ihre Auswirkungen auf die Usability-Forschung diskutiert. An konkreten Projekten werden neue Herausforderungen an die Usability-Forschung dargestellt, neuartige Lösungen für Usability-Probleme erläutert und neue Werkzeuge und Frameworks für die Unterstützung des Usability Engineerings vorgestellt.

Die Zukunft interaktiver Systeme: Herausforderungen an die Usability-Forschung (The Future of Interactive Systems: Challenges to the Usability Research)

Holger Diener

Papers

Die Zukunft interaktiver Systeme: Herausforderungen an die Usability-Forschung (The Future of Interactive Systems: Challenges to the Usability Research)