Index_E

E

Editing and ordering survey questions, 319–321

Editorial voice, 50

Efficiency

as success criterion, 19

of user-centered processes, 516

See also functionality; usability

Ejecting focus group participants, 238

Elms, Teresa, 414

Email

contacting specialists by, 454

mailing lists for recruiting, 91

problem report diary form, 380, 381

recruiting by, 88

screeners, 102–103

spam, 91

survey invitations, 336–337

survey-structured diary form, 376, 377

unstructured diary study form, 374–375

unstructured diary study instructions, 371–373

usability test diary form, 378, 379

Emotional topics in focus groups, 236

Emphasis, user interfaces and, 49

Employees, new, 92

End users. See users

Engineers, presentations to, 496–498

Environment attributes of audiences, 138–139

Equipment costs, 76, 530–531

Errors in surveys

checking, 325

confidence interval, 351–352

estimating, 350–352

measurement errors, 352–354

sample size for 95% confidence, 332

standard deviation, 351–352

standard error, 332, 350–351

systematic error, 353

Ethics of log analysis, 408

European Society for Opinion and Market Research, 113

Evaluation instructions for usability testing, 279–280

Evaluator for usability testing, 259, 290

Evaluator profiles section of reports, 487–488

Evolutionary lifecycle, 30–31. See also iterative development

Examination step in iterative development

overview, 31

scheduling service example, 37, 38, 39–41

Executive summary section of reports, 484–485

Expectations

of audience for reports and presentations, 481, 503

probing in usability testing, 288

set by familiarity, 369

set by research plan, 75

setting with specialists, 454–457

survey bias from, 335

Expert/novice model for contextual inquiry, 168

Expiration dates for cookies, 407–408

Explanatory goals, 307

Exploratory focus groups, overview, 205–206

Eye tracking, 466–467

EyeTools, 466

EZSort software for card sorting, 196–198