Human Centered Design & Engineering UW

Heuristic evaluation consists of a method of analysis where evaluators comment on what is good or bad about an interface design. The main purpose of the study, Heuristic Evaluation of User Interfaces by Rolf Molich and Jakob Nielsen is to demonstrate the benefit of conducting heuristic evaluations when aggregating the evaluations from several evaluators as opposed to conducting evaluations with a single assessor. To support this claim, the researchers conducted a study consisting of four different experiments where a number of participants were asked to analyze an interface heuristically. The outcomes were compared with the usability problems developed by the authors. As a result, the study demonstrates that, on average, only 20 to 51% of the problems were found by individual participants. However, the authors note that the percentage of usability problems discovered increases when several people conduct the evaluation and their results are aggregated to form a larger set of usability problems. The study, through use of graphically displayed results, shows that “the ‘collected wisdom’ of several evaluators is not just equal to that of the best evaluator of the group.” Aggregates were formed by randomly selecting different numbers of evaluators from the total set of evaluators in the experiments. …


Human Centered Design & Engineering

Heuristic evaluation consists of a method of analysis where evaluators comment on what is good or bad about an interface design. The main purpose of the study, Heuristic Evaluation of User Interfaces by Rolf Molich and Jakob Nielsen is to demonstrate the benefit of conducting heuristic evaluations when aggregating the evaluations from several evaluators as opposed to conducting evaluations with a single assessor. To support this claim, the researchers conducted a study consisting of four different experiments where a number of participants were asked to analyze an interface heuristically. The outcomes were compared with the usability problems developed by the authors. As a result, the study demonstrates that, on average, only 20 to 51% of the problems were found by individual participants. However, the authors note that the percentage of usability problems discovered increases when several people conduct the evaluation and their results are aggregated to form a larger set of usability problems. The study, through use of graphically displayed results, shows that “the ‘collected wisdom’ of several evaluators is not just equal to that of the best evaluator of the group.” Aggregates were formed by randomly selecting different numbers of evaluators from the total set of evaluators in the experiments. …


Using Rhetorical Strategies for Technology Persuasion 

During the 4th century BCE, Aristotle wrote Rhetoric where the philosopher presented the possible ways that orators or writers could persuade their spectators by the use of evidence. Aristotle was a Greek philosopher that lived during the 384 BC — 322 BC. He shared classrooms with Plato and Alexander the Great. Some of the subjects where he was an innovator included theater, music, logic, physics, metaphysics, linguistics, politics, and rhetoric. Aristotle is considered one of the most important figures of Western philosophy.

Aristotle‘s Rhetoric has been the foundation for philosophers and writers during centuries and the use of persuasive writing was as useful for the old ancients as it is during this century. As a result, rhetoric has been used in fields such as politics, literature and technology. In the case of technology, due to its constant change and evolution, rhetorical strategies get adapted as technology advances. This paper researches how the use of traditional rhetorical strategies such as Aristotle´s rhetorical modes of appeal can help to persuade users to buy technological products or to motivate decisions regarding technology. …

About

Carlos Marin Burgos

I like to design easy-to-use and beautiful user interfaces and experiences. www.carlosmarin.net

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