Index 307 A Access task survey, public health record case study methodology, 241­243 objectives, 240­241 outcomes doctor's electronic health information access, 245, 246 drug interactions, 243­245 medical information entry, 243­249 updating of profile, 245­247, 248, 249 Advanced Text Analyzer, comment task data metrics, 25, 154 Combinations, data analysis and presentation, 163­166 Combination studies expert review, 12 overview, 10­14 usability lab testing, 11­12 Web traffic analysis, 13­14 Commercial tools, see also specific tools comparison of tools, 215 questions for selection, 212­215 Competitive evaluation, 20, 299­300 Comprehensive usability study, task success modification, 114 participant removal, 109­112 quality checks, 108­109 recoding and creating new variables clickstream data, 117­119 self-reported variables, 116­117 task success, 114­115 time variables, 115­116 Demographic questions, post-session, 87­88 Design comparisons, 6, 171­173 improvements, 7­8