1.What kinds of information and insights did it give you about the usability of the prototype?
User observation and Think aloud these two processes provide us different ways to observe user. For the user observation process, we can observe user’s facial expression to know the feelings and thoughts of users. For example, we could know that user might face some difficulty while using the interface when he was frowning or thinking for long time to continue. For the think aloud process, user could directly tell the observer what he feel and what he thought, and it’s easier to capture the real thoughts from users.
2.What aspects of the technique worked well or were frustrating?
For the user observation process, the observer might misinterpret users’ feelings. For example, most of people would frowning while thinking, but it doesn’t mean there are some problems with the interface design. So, I consider the process of user observation might misinterpret users’ feelings and thoughts in somehow. For the process of think aloud, I think this technique worked well than the other one a little bit, because it’s clearer for observer to understand what users’ feelings and thoughts. And it’s easier to capture users’ ideas through verbal expression.