1.What kinds of information and insights did it give you about
the usability of the prototype?
As an evaluator, I carefully observe the users and record their
facial expression, body language and intuitive comments. While
testing, the users would express their feelings by words and
2) What aspects of the technique worked well or were frustrating?
During the process of observation, I found I can quickly capture
the user in the process of using and record some of the facial
expressions and comments. However, I was confused about
the meaning of certain facial expression. And some users don’t
use to talk aloud while working, although this is a very good