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Novel approaches for the design of assistive technology controls propose the usage of eye tracking devices such as for smart wheelchairs and robotic arms. The advantages of artificial feedback, especially vibrotactile feedback, as opposed to their use in prostheses, have not been sufficiently explored. Vibrotactile feedback reduces the cognitive load on the visual and auditory channel. It provides tactile sensation, resulting in better use of assistive technologies. In this study the impact of vibration on the precision and accuracy of a head-worn eye tracking device is investigated. The presented system is suitable for further research in the field of artificial feedback. Vibration was perceivable for all participants, yet it does not produce any significant deviations in precision and accuracy.
When a new product is produced, it makes sense, to test the usability before its appearance on the market. Within such a test there are different methods which can be used. For example, the eyetracking method. This research report illustrates how the eyetracking method can be used in combination with a qualitative inquiry to identify problems of a product. The study was conducted in cooperation with the company K+UPrintwareGmbH in Ettenheim. The object of the study was the EcoCash recycling and selling machine. The main element of this study is the identification of problems in the user interface and the handling of the machine. Furthermore, solutions to solve the problems were included.
Jakob Nielsen, einer der bekanntesten Experten im Bereich der Benutzerfreundlichkeit, spricht der Usability im Web neben einer großen Bedeutung auch die Fähigkeit zu, aus Besuchern Kunden zu machen: „If a website is difficult to use, people leave.“[1] Im Umkehrschluss bedeutet das, wenn eine Webseite einfach zu bedienen ist, werden die Besuchenden länger auf ihr verweilen und im Idealfall die gewünschte Handlung ausführen. Eine Handlung, die einen Besucher zum Kunden qualifiziert, wird als Coversionshandlung bezeichnet. In den meisten Fällen geht es dabei um das Absenden eines Formulars. Innerhalb dieses Forschungsberichts wird aufgezeigt, wie die Methode Eyetracking in Kombination mit einer qualitativen Nachbefragung mit halb strukturiertem Fragebogen genutzt werden kann, um Probleme bei der Benutzerfreundlichkeit zu identifizieren.