Information Technology Reference
In-Depth Information
Figure 7.21 In this visualization of data from the PressureMouse, the mouse leaves a “trail” on the
screen. The thickness of the trail indicates how tightly the participant is gripping the mouse. In this
example, the participant is initially gripping with normal pressure while completing the online survey.
When he clicked on the “Continue” button (#1), the pressure was still normal, until he started reading
the error message, which caused him to grip the mouse tighter (#2). Finally, after dismissing the dialog
box and seeing that the data he had entered was now gone, his grip on the mouse got even tighter (#3).
Adapted from Reynolds (2005); used with permission.
patience for download times or error messages, or measuring teenagers' level of
engagement with new social networking applications.
7.5 SUMMARY
This chapter covered a variety of ways to measure user behaviors and emotions.
This provides potentially valuable insights into the deeper user experience that
is often very easy to miss in the course of a usability test. These tools are becom-
ing much easier to use, more accurate, more versatile and powerful, and even
quite affordable. Despite these many advances, we strongly recommend taking
advantage of other UX metrics and not relying solely on this technology to tell
you everything about the user experience. Here's a summary of some of the key
points to remember.
1. A structured approach to collecting unprompted verbal expressions
during a usability test can be very helpful by tabulating the number of
positive and negative comments made by participants during each of
the tasks.
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