The bloopers include mistakes in window design, labeling consistency, visual/grammatical parallel construction, coherence of look and feel, and clarity. Most perceptively, Johnson observes that CPU speed in the development group hides many design mistakes. Moreover, context-scoping, already a subtle problem in software design, must be implemented in GUI design. Input error handling is the most psychologically sensitive of all GUI design characteristics. User error messages can easily be too vague or too specific, and diagnostic error messages should be user-manageable, if not actually user-interpretable.
Like the Hollywood outtakes that gave us the "blooper," the entertainment quotient here is measured in mistakes, not successes. Teaching by counter example rather than by example at an estimated ratio of three to one, Johnson panders to our invertebrate instinct to measure our own successes by someone else's failure. To his credit, he recognizes that user interfaces include pedestrian texts (like his) as well as graphical interfaces for computer applications. His self-referential style gives the book an egocentric slant, but he is both priest and practitioner: he submitted a draft to usability testers and reports the results in an appendix. One criticism was that there were too many negative examples. Hmmm.
Thanks to other tester comments, GUI Bloopers is a browsable book, allowing the few nuggets of wisdom to be located. For the most part, the book's value can be captured by reading the seven-page table of contents carefully. --Peter Leopold
From Library Journal
Copyright 2000 Reed Business Information, Inc.