Eleftherios Papachristos

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In this paper, a novel methodology for selecting appropriate color scheme for a web site is presented. The methodology uses a machine learning algorithm for generating a network that relates the color model of a web site with the emotional values that are attributed to it by its users. The approach involves an empirical study to collect data, used to train(More)
The usability is recognized as an important quality factor of any modern website. In this paper, techniques for usability evaluation of a website are proposed and their use is described. The results of application of these techniques are discussed in the frame of the design and evaluation of a web portal, serving an Academic Department. The applicability of(More)
This paper investigates whether immediate impression about web-sites influences only perceptions of attractiveness. The evaluative constructs of perceived usability, credibility and novelty were investigated alongside visual appeal in an experimental setting in which users evaluated 20 website screen-shots in two phases. The websites were rated by the(More)
This paper explores the possibility to predict positive aesthetic impression and user preference of website design through a combination of objective and subjective factors. The objective factors used are symmetry, order, balance, complexity while the subjective ones include familiarity-novelty ratings. The advantages of such an approach is the reduction of(More)
Color plays an important role in web site design. The selection of effective chromatic combinations and the relation of color to the perceived aesthetic and emotional value of a web site is the focus of this paper. The subject of the reported research has been to define a model through which to be able to associate color combinations with specific desirable(More)
When people interact with digital artefacts they perceive their pragmatic and hedonic qualities. In the case of interacting with mobile devices and applications, users seek utility as they try to satisfy certain needs, but at the same time they have certain feelings and emotions when, for example, they feel attached to their personal phone and/or trust its(More)
Social media provide businesses with a great opportunity for monitoring customer views about their products or their brand. However this valuable information is hidden often in large amounts of data. So there is a need for new tools that filter data and enable businesses to find easily relevant info rmation. Recently research that focuses on methods and(More)
Social Media (SM) are today engaging millions of users over the Web. Within this realm, it has become a necessity for Small and Medium Size Enterprises (SMEs) to be present and get feedback about their products and services, as SM can be a great venue for increasing their customer base, implementing customer relationship management , targeting advertisement(More)
This paper investigates whether users' aesthetic impressions about websites vary considerably across different domains. The assumption that aesthetic judgments about websites that belong to diverse domains are based on different visual design aspects has been investigated in three distinct studies in healthcare, tourism, and web design business. In these(More)