Cognitive Walkthrough

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There isn't a usability thermometer to tell us how usable an interface is. We observe the effects and indicators of bad interactions then improve the design. There isn't a single silver bullet technique or tool which will uncover all problems. Instead, practitioners are encouraged to use multiple techniques and triangulate to arrive at a more complete set of problems and solutions. Triangles of course have

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Heuristic Evaluations and Cognitive Walkthroughs belong to a family of techniques called Inspection Methods. Inspection methods, like Keystroke Level Modeling, are analytic techniques. They don't involve users and tend to generate results for a fraction of the time and cost as empirical techniques like usability testing. They are also referred to as Expert Reviews because they are usually performed by an expert in usability or

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