PURPOSE Accurate characterization of diagnosis instruments is crucial in medical applications such as radiology and clinical neurosciences. While classical CRT medical displays have been replaced almost exclusively with liquid crystal devices (LCDs), the assessment of their temporal properties (response times) is still largely based on heuristic methods, which have not been evaluated thoroughly...

Single Display Groupware (SDG) is a research area that focuses on providing collaborative computing environments. Traditionally, most hardware platforms for SDG support only one person interacting at any given time, which limits collaboration. In this paper, we present laser pointers as input devices that can provide concurrent input streams ideally required to the SDG environment. First, we di...

Human beings perceive their surroundings based on sensory information from diverse channels. However, for humancomputer interaction we mostly restrict the user on visual perception. To investigate the effect of additional tactile feedback on pointing and selection tasks we conducted a comparative evaluation study based on ISO 9241-9. The 20 participants performed horizontal and vertical one-dir...

A test battery was developed for cursor control device evaluation: four tasks were taken from ISO 9241-9, and three from previous studies conducted at NASA. The tasks focused on basic movements such as pointing, clicking, and dragging. Four cursor control devices were evaluated with and without Extravehicular Activity (EVA) gloves to identify desirable cursor control device characteristics for ...

Global competition requires that new technical products are launched at the same time in all relevant global markets. Therefore the Human Computer Interface (HCI) product designers need to know all requirements of all global customer groups before starting the global development process of user interfaces (UI), which takes normally place in dispersed intercultural mixed UI designer teams. There...

Öz. Kullanılabilirlik kavramı günümüzde çok fazla bilginin çok küçük cihazlara sığdırma zorunluluğu, rekabetin artması, kullanıcı için alternatiflerin çoğalması gibi nedenlerle oldukça popüler olup, kullanıcı deneyiminin kontrol altına alınması olarak tanımlanmaktadır. ISO 9241 standardında ise kullanıcının amacına etkin, etkili ve tatmin edici şekilde ulaşılmasının sağlanması olarak açıklanmak...

GeoTest is a project initiated by Future Position X (a GIS cluster organization in Gävle, Sweden), the National Land Survey of Sweden (NLS) and the University of Gävle. The project aims to test Swedish geodata, services and geoportals and make sure they comply with the INSPIRE the other specifications. GeoTest has developed a method for testing the usability of geoportals. The method is based o...

One of the main problems of standards (e.g., DIN 66234, ISO 9241) in the context of usability of software quality is, that they can not be measured in product features. We present a new approach to measure user interface quality in a quantitative way. First, we developed a concept to describe user interfaces on a granularity level, that is detailed enough to preserve important interface charact...

We present two studies to comparatively evaluate the performance of gesture-based 2D and 3D pointing tasks. In both of them, a Wiimote controller and a standard mouse were used by six participants. For the 3D experiments we introduce a novel configuration analogous to the ISO 9241-9 standard methodology. We examine the pointing devices’ conformance to Fitts’ law and we measure eight extra param...

One of the main problems of standards (e.g., DIN 66234, ISO 9241) in the context of usability of software quality is, that they can not be measured in product features. We present a new approach to measure user-interface quality in a quantitative way. First, we developed a concept to describe user-interfaces on a granularity level, that is detailed enough to preserve important interface charact...