In this paper, we will discuss the philosophical traditions invoked by various hypertext theorists and the reader roles that are accommodated or required by those traditions. Therefore, we conducted a user study in which we experimentally evaluated GUIs tailored for a smartphone and a tablet PC, respectively. The exercise used in the survey, a dialogue that the participants were asked to evaluate is then given. But I made it.". 4 0 obj It is due to the bias of the evaluator, questions. Molich & Nielson suggest nine basic items of usability (Molich & Nielson, Table 2: Molich & Nielson’s nine basic items of usability, Although it is possible to do a successful evaluation with these nine basic items of, Heuristics for Web Communications. It gives a number in per cent a, usability problems that can be derived from the 203 questions but hardly identifies, The identification of concrete usability problems and suggestions on how to impr, usability are the practical advantages of the "Heuristics f, heuristics are not simply checklists that can be answered b, 'no'. technical equipment had to be arranged, the test scenario had to be designed and tested, participants had to be recruited and tests had to be conducted with two experimenters, who had to be present all the time to supervise the participa, equipment. The book provides the tools needed to avoid usability surprises and improve product quality. Usability plays a very important role in improving the effectiveness of these systems. shows a sketch of the laboratory in which the tests take place. A general problem of, usability is that it is "soft" concept, i.e. Visited: 08/17/00. The tool enables the visualization of different types of geo-tagged content and sensor data collected using mobile devices. They help the evaluator to, consider all substantial usability issues and to focus on the important points. Three independent variables represented user differences: level of expertise (faculty vs. student), age, and gender. $�����"���Hhxj�"������*�G,����lg^��GH���n�E��dT6�HD�ᢲ-�(�qe����~͘S���c��vB���E܇w��99�.�6i۫�"q/���iև7ݖyZ��g��]r�W�Wo���A������2Kab�U��̊ \W��6w�JW앫�%Lj7z�ԙ�N�!9�璡��r�x�"��� Refining the Test Phase of Usability Evaluation: How Many Subjects Is Enough? Text Comprehension and the Web: Heuristics for Writing Understandable. Der Betrag beschreibt eine Usability-Studie zur Evaluation eines betrieblichen Intranet- 2 0 obj It also indicates that a system should work the way users expect it to. This paper reports on a usability evaluation of Lazada mobile application, an online shopping app for mobile devices. Michalak, Susan/Coney, Mary (1993): Hypertext and the Author/Reader Dialogue. Etwa dann, wenn am Bankautomaten Menüoptionen zum Geldabheben nicht direkt parallel zu den Knöpfen angebracht sind, über welche die Auswahl erfolgen soll. When pages must, scroll, provide visual cues to encourage users to scroll down to links that are below the, scroll line." The rating ranged from 0 (no usability problem) to 4 (usability catastrophe, and was conducted with respect to the frequency and persistence of the problems and, the impact they have on users. However, there are some observed usability issues with the main menu and the payment method that necessitates improvements to increase the application's effectiveness, efficiency and satisfaction. Finally, we will discuss the hypertext author’s virtual presence, the implied author, as a corollary of reader role. 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