Human computer interaction Flashcards
Heuristic evaluation
Heuristic evaluation involves reviewing a user interface and assessing whether the interface violates any design or usability standards. Examples of commonly used heuristics in interface design include Jakob Nielsen’s checklist. In informatics, recent work by Horsky, Middleton, and others may be used to develop heuristics for decision support and medication prescribing.
developer or tester reviewing a user interface against a set of design guidelines or “rules of thumb.”
Usability Testing
Think-aloud exercises are an example of Usability Testing, as they involve direct measurement of a user’s performance
Usability Inquiry
In contrast, focus groups, surveys, and usage-log analysis are examples of Usability Inquiry, as they involve assessing use/usability after the fact. T
Usability inspection
third category is Usability Inspection – in which analysts scrutinize the user interface, typically with a cognitive walkthrough of a low fidelity prototype
Visibility of system status
system violated the heuristic of “visibility of system status” – after submitting the order, the interface did not change to reflect that the order was being processed. The user perceived no change in the system status and assumed the task had not been completed.
effective design of CDS to support medication prescribing include which of the following recommendations:
orsky and Middleton papers cited in the lecture. Recommendations include use of a consistent color palette (ex: the color red should be used sparingly, and should always “mean” the same thing within the context of the EHR). Pick lists should not have an overwhelming number of options (recall that the Hick-Hyman law predicts a logarithmic increase in response time as the number of options in a pulldown menu increase). When displaying concurrent alerts, alerts of similar severity should be grouped together. Consistency and minimalism in a user interface are desirable from a usability standpoint.
