“Whoa! It’s like Spotify but for academic articles.”

Instant Access to Thousands of Journals for just $40/month

Try 2 weeks free now


USER INTERFACE DESIGN PROCESS AND EVALUATION AN AFTER-SCENARIO QUESTIONNAIR E FOR USABILITY STUDIES : PSYCHOMETRIC EVALUATIO N OVER THREE TRIALS James R . Lewi s DISCUSSIO N Design Center/Human Factors IBM Boca Raton, Florida INTRODUCTIO N The purpose of this report is to (1) describe a psychometric evaluation of a printer scenario questionnaire (PSQ) that was used to assess user satisfaction during scenario-base d usability studies of printers and (2) compare the psychometric properties of the PSQ with those of the After Scenario Questionnaire (ASQ) (Lewis, 1991b) . The PSQ i s similar to the ASQ, but is composed of three five-poin t scales rather than three seven-point scales . METHOD The results of this study of the PSQ are similar to thos e reported for the ASQ (Lewis, 1991b) . The factor analyse s showed the same pattern of association with scenarios, but extended through three trials . The analysis of variance ha d the same pattern as well, with no main effect of printer bu t a significant Printer-by-Scenario interaction . The correlation between the summed PSQ ratings and successfu l scenario completion for the first trial was - .38, very close to that of the ASQ . In the only discrepant result from the ASQ study, coefficient alpha for the PSQ ranged from .64 to .93 . Coefficient alphas reported for the ASQ all exceeded .90 . Because the internal consistency of a questionnaire is partially determined by the number of scale step s per item (Nunnally, 1978), it is likely that the smalle r coefficient alphas found for the PSQ were primarily due to the use of five-point scales rather than seven-point scales . CONCLUSIO N A total of 70 users participated in the studies, ten users pe r printer . Seven printers were evaluated, and the studies ha d four scenarios in common . Each scenario was presented three times during the study . After participants finished a scenario, they completed the PSQ. RESULTS This research showed that the usefulness of the ASQ i s probably not dependent upon the order, format, or the exac t wording of the items, and the ASQ should remain usefu l across multiple trials. Therefore, the ASQ (see Lewis, 1991b) should be seriously considered when choosing a measurement of participant satisfaction for scenario-base d usability studies . http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ACM SIGCHI Bulletin Association for Computing Machinery

Loading next page...
1 Page

You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy unlimited access and
personalized recommendations from
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $40/month

Try 2 weeks free now

Explore the DeepDyve Library

How DeepDyve Works

Spend time researching, not time worrying you’re buying articles that might not be useful.

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from Springer, Elsevier, Nature, IEEE, Wiley-Blackwell and more.

All the latest content is available, no embargo periods.

See the journals in your area

Simple and Affordable Pricing

14-day free trial. Cancel anytime, with a 30-day money-back guarantee.

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Best Deal — 25% off

Annual Plan

  • All the features of the Professional Plan, but for 25% off!
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

billed annually