Jarinee Chattratichart

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Given that heuristic evaluation (HE) is a popular evaluation method among practitioners despite criticisms surrounding its performance and reliability, there is a need to improve the method's performance. Several studies have shown HE-Plus, an emerging variant of HE, to outperform HE in both effectiveness and reliability. HE-Plus uses the same set of(More)
For more than a decade, the number of usability test participants has been a major theme of debate among usability practitioners and researchers keen to improve usability test performance. This paper provides evidence suggesting that the focus be shifted to task coverage instead. Our data analysis of nine commercial usability test teams participating in the(More)
The lack of standard assessment criteria for reliably comparing usability evaluation methods (UEMs) is an important gap in HCI knowledge. Recently, metrics for assessing thoroughness, validity, and effectiveness of UEMs, based on user data, have been proposed to bridge this gap. This paper reports our findings of applying these proposed metrics in a study(More)
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Research into the psychology of programming has been mostly related to textual programs. The application of the theory of programming to visual programs could be further supported by empirical evidence. Graphical readership, a skill that cannot be ignored in visual programming, has been little explored; similarly the case with regard to the effect of(More)
Historically, graphical programming and visual programming most commonly used arrows, lines or juxtaposition to represent visually the order or a sequence of actions. The choice of representation can affect the performance of a user of such systems in following a sequence of actions, both in terms of time and of accuracy. However, there is little empirical(More)
<b>Motivation</b> -- To design ways of attracting users onto Internet sites, which are more persuasive than Banner advertisements, and which maintain the usability of the host site equally well. <b>Research approach</b> -- An initial example of a "Follow-on" 'advertisement' is developed in a demonstration domain and tested in a usability laboratory. The(More)