Evaluation Measures

Quantitative Data:

• Time to completion of each task
• Number of participants completing tasks within allocated time
• Number of participants completing tasks with extra time
• Number of problems encountered
• Number of errors (unsuccessful tries)
• Number of local problems
• Number of times each participant uses “help” menu
• Number of times each participant accesses advertising sites
• Length of time each participant spends on browsing advertisements

Qualitative Data:

• Facial expressions
• Verbal comments when they think out loud
• Spontaneous verbal expressions (comments)
• Interviews before the test
• Interviews after the test
• Miscellaneous activities (stretching, wanting breaks, etc.)

taken from: Barnum, Carol. “Usability Testing and Research” p186

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