User experience (UX) is gaining more and more relevance for designing interactive systems. But the real character, drivers and influences of UX are not sufficiently described until now. There are different theoretical models trying to explain UX in more detail, but there are still essential definitions missing regarding influencing factors i.e. temporal aspects. UX is increasingly seen as a dyn...

The propose of this paper is to present a literature review, in a grouping of common criteria for usability approaches of Bastien and Scapin (1993), Nielsen (1994), Shnneiderman(1998), Dix et al (1998), Preece et al (2005) and ISO 9241-110 (2006). After establishment of prerequisites for knowledge of the general characteristics of the users who will use the system, are defined and explained the...

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 characterise foot movements as input for seated users. First, we built unconstrained foot pointing performance models in a seated desktop setting using ISO 9241-9-compliant Fitts’s Law tasks. Second, we evaluated the effect of the foot and direction in one-dimensional tasks, finding no effect of the foot used, but a significant effect of the direction in which targets are distributed. Third,...

424  Abstract:Usability is one of the most important factors for evaluating the quality of software/website. There are different dimensions through which usability of software can be evaluated. But the concept of usability is complicated. As the evaluation of usability is dependent on user experience, the data becomes difficult to work on as it is fuzzy in nature. There are different types of ...

In this study, an investigation was conducted into the extent to which ergonomic requirements for work on computers are met in Greek office workstations. The ergonomic requirements considered were those included in Council Directive 90/270/EEC (1990) of the European Union and the ISO 9241 (1997) standard. 593 office workstations were assessed using an assessment tool consisting of 70 assessment...

Longan has been regarded as an important economic fruit for export of Thailand. In order to support Thai longan growers, the Thai government has set a strategic plan to enhance longan production and knowledge distribution by funding research and development, and constructing of Longan Knowledgebased System (LKS). This paper presents the construction process of LKS called ‘easy’ knowledge engine...

The present study investigated the effect of menu orientation on user performance in a menu items' selection task in virtual environments. An ISO 9241-9-based multi-tapping task was used to evaluate subjects’ performance. We focused on a local interaction task in a mixed reality context where the subject’s hand directly interacted with 3D graphical menu items. We evaluated the pointing performa...

We propose MarkerMouse, an inexpensive method for controlling the mouse cursor using a web cam and a marker placed on the user’s forehead. Two modes of cursor control were compared: position-control and velocitycontrol. In position-control mode the cursor is positioned where the user's head is pointing. In velocity-control mode the mouse cursor moves in a constant speed in the direction the use...

There are many different types of measures of usability and user experience (UX). The overall goal of usability from a user perspective is to obtain acceptable effectiveness, efficiency and satisfaction (Bevan, 1999, ISO 9241-11). This paper summarises the purposes of measurement (summative or formative), and the measures of usability that can be taken at the user interface level and at the sys...