UNIT 5 > MODULE 1

Lesson 1: Testing the Usability of Navigational Systems

Overview

Usability testing is a way of evaluating how target users are using a website. This is a necessary step in the design process, because often users do not approach a website in the same way that its designers do. Usability testing helps to identify areas where your site navigation isn't working as you intended it to, and may reveal other user behaviors that you hadn't anticipated.

Learner Outcomes

At the completion of this exercise:

• you will be able to describe four common steps in a usability test
• you will have an opportunity to conduct your own usability test on a website of your choosing

A Typical Usability Test

A typical usability test will involve these four steps:

1. Find representative users from the target population. For example, if the site is a company's online shpoping site, represenative target users would be consumers who shop for the types of products sold by that company.
2. Ask the users to perform representative tasks on the website. For example, represenative tasks on an online shopping site might include:
   • Find a particular product (as the tester, you would specify the product)
   • Place that product in your shopping cart and proceed to checkout
   • Find a phone number to call a customer service representative
3. Observe what the users do. Write down all the steps they take, and whether they succeed or fail in performing the requested task. Don't provide any assistance to the users - just let them solve any problems on their own and write down how they go about doing so.
4. Summarize your results. By observing several users, what have you learned about the design of this website? How might it be improved?

Activities

• Read Usability 101, by Jakob Nielsen
• Your teacher will assign you to a group. The other students in your group will be the subjects in your usability test, and you will be theirs.
• Select a large website on which to conduct a usability test.
• Write down who the target audience is for this website.
• Write down three representative tasks for this website.
• Work with your other group members to decide upon an order of usability tests.
• To conduct a usability test, you must watch each of your other group members, one at a time, as they perform the three representative tasks that you've identified. When you're testing one subject, the other subjects should not be present since this will affect the results.
• Assign the subject one task at a time, and watch them perform this task. Record your observations in detail. Document all steps that each subject took, as well as anything else you might have noticed, including comments made by the subject, evidence of confusion, etc. Don't help the subject. Just observe.
• Create a new HTML document to show completion of this lesson and all of the lessons in Unit Five: Overall Site Design and Management. Save the file in the "lesson" sub folder with the file name "unit5.html". Using <h1> heading tags head this section of the document, "Usability Test". Beside the heading place an anchor like this <a name="usability"> On your portfolio, make the text referencing this lesson a hyper link to the file unit5lessons.html. Be sure to name the anchor within the link.
  
  <a href ="unit5lesson.html#usability">
  
  After all subjects have completed the tasks, write a report to post on your portfolio. In your report summarize what you learned from the usability test. Is the current design effective? Why or why not? Were subjects able to complete the tasks? Were the tasks easy for them? Could the tasks have been performed with fewer steps? How might the site be designed differently so that users could more easily perform the representative tasks?

Resources/Online Documents

• Usability 101, by Jakob Nielsen

All done?

Show your instructor the written results of your usability test. The proceed to Lesson 2.

Copyright © 2006 by University of Washington. Permission is granted to copy these materials for educational, noncommercial purposes provided the source is acknowledged. This product was funded by the National Institute on Disability and Rehabilitation Research of the U.S. Department of Education (grant #H133D010306). However, the contents do not necessarily represent the policy of the Department of Education, and you should not assume their endorsement.