http://dl.gi.de/handle/20.500.12116/39735 Tue, 21 Jul 2026 13:29:16 GMT 2026-07-21T13:29:16Z http://dl.gi.de:80/bitstream/id/460e7034-89e5-4b9c-8951-9e7184b868ec/ http://dl.gi.de/handle/20.500.12116/39735 http://dl.gi.de/handle/20.500.12116/39740 Time related changes of affective dimensions and distinct emotions in the interaction with a tablet PC Brandenburg, Stefan; Spang, Robert Examining peoples’ affect and emotions over time and their effects on peoples’ behavior are ongoing endeavors in human-computer-interaction (HCI) research. This paper reports an experiment in which participants watched either positive or negative film clips on a tablet PC to enter a positive or negative affective state. Successively, they accomplished four basic system interaction tasks like changing fonts of an app on the same device. Results show that, in line with previous studies, peoples’ general valence ratings quickly reverted to neutral when starting the task accomplishment. At the level of distinct positive emotions, participants’ ratings of hope, joy, and serenity decreased after watching negative film clips. Moreover, amusement, love, and serenity decreased during the interaction with the tablet PC. Amongst the negative emotions, only ratings of sadness increased after watching negative film clips and decreased again after the interaction. Also, participants in the positive film group were slower in executing one of the basic tasks than participants in the negative film group. The findings suggest that only few emotions may be causal for peoples’ ratings of general affect. Results also indicate that negative emotions may help people executing standard tasks, in contrast to positive emotions. Implications for HCI design and research are discussed. Sat, 01 Jan 2022 00:00:00 GMT http://dl.gi.de/handle/20.500.12116/39740 2022-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/39741 Design and implement a mobile-based system to teach traffic signs to illiterate people Alfayez, Zainab Hameed Nowadays, most information and communication technologies target literate users and neglect the 800 million illiterate individuals around the world. Although there have been several attempts to develop systems that help illiterate people and try to reduce the digital gap between them and those who are literate, it is still challenging to find accessible systems for illiterate people. This research aims to reduce the digital gap between illiterate and literate people in Iraq through developing a mobile application for learning traffic signs. Firstly, a requirement elicitation study was conducted to explore a set of design considerations and build an accessible interface for illiterate people. The study resulted in several design principles, such as using voice instructions, focusing on graphic content, and using the local language. Then, the mobile application was developed based on these design principles. Finally, an evaluation study was conducted to measure the usability of the developed application. The results revealed that the built application is efficient and effective, and the users were extremely satisfied in several aspects, such as easy usage and learnability, and declared that they would use it in the future and recommend it to others. Sat, 01 Jan 2022 00:00:00 GMT http://dl.gi.de/handle/20.500.12116/39741 2022-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/39736 Editorial Koch, Michael Sat, 01 Jan 2022 00:00:00 GMT http://dl.gi.de/handle/20.500.12116/39736 2022-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/39739 Self-touch: an immersive interaction-technique to enhance body awareness Keppler, Sebastian; Döllinger, Nina; Wienrich, Carolin; Latoschik, Marc Erich; Israel, Johann Habakuk Physical well-being depends essentially on how the own body is perceived. A missing correspondence between the perception of one’s own body and reality can be distressing and eventually lead to mental illness. The touch of the own body is a multi-sensory experience to strengthen the feeling of the own body. We have developed an interaction technique that allows the self-touch of the own body in an immersive environment to support therapy procedures. Through additional visual feedback, we want to strengthen the feeling for the own body to achieve a sustainable effect in the own body perception. We conducted an expert evaluation to analyse the potential impact of our application and to localize and fix possible usability problems. The experts noted the ease of understanding and suitability of the interaction technique for increasing body awareness. However, the technical challenges such as stable and accurate body tracking were also mentioned. In addition, new ideas were given that would further support body awareness. Sat, 01 Jan 2022 00:00:00 GMT http://dl.gi.de/handle/20.500.12116/39739 2022-01-01T00:00:00Z