Usability has become a critical quality factor of software systems. Although it was defined as one attribute of software quality in the first quality decompositions at the end of the 70’s, it has not been really considered and it has been historically relegated in relation to other quality factors such as efficiency, reliability, safety and so one. For this reason, most software development met...

Interaction with user interfaces only with usage of hands and bodies was a few years back still science fiction, but now present reality. Touchless interfaces are slowly becoming mainstream and therefore it is of crucial importance to address them in a concise and standardized way. Usability is an important factor in all software quality models and a key factor during development of interactive...

An empirical study examined the effects of two influencing factors in usability tests on user performance and usability ratings. Aesthetics of design (high vs. low) as the main independent factor and prior usage event (positive vs. negative) as a subsidiary independent factor were varied in a between-participants design. 60 participants took part in the experiment, completing a number of typica...

In the recent years, many factors have been recognised as an important contributor in evaluating software quality. Evaluating software is significant for managing, controlling and improving a software development life cycle. Quality of software cannot be measured easily, it depends on various factors. Usability is one of the chief quality factor and important aspect of software quality. This pa...

In this work we propose a methodology named QUEM (Quantitative Usability Evaluation Model) for quantitative usability evaluation of e-commerce websites. Many e-commerce websites lack user friendliness. The main factor that prevents these firms to conduct usability testing is the high costs and the need for usability experts. In this work, ISO/IEC 9126-1:2001 quality model was selected as a basi...

In this work we propose a methodology named QUEM (Quantitative Usability Evaluation Model) for quantitative usability evaluation of e-commerce websites. Many e-commerce websites lack user friendliness. The main factor that prevents these firms to conduct usability testing is the high costs and the need for usability experts. In this work, ISO/IEC 9126-1:2001 quality model was selected as a basi...

Two-factor authentication is often considered by users as annoying, hard to use and time consuming due to their complexity and implementation this often leads to users making usability-focused decisions at the expense of security. We believe the development of biometric recognition technology allows for an improvement in the way we implement twofactor authentication systems. In this paper we st...

Dynamic usability-testing is required for the improvement of various Human-Computer interactive systems. This paper examines the indices of assessing usability using the frequency spectrum of eyemovements up to four Hz. An input operational task experiment was conducted using a mouse (Mouse), a keyboard (KeyBD) and a keypad (KeyPAD), and the conventional subjective system usability measurements...