When I worked as an user, I’m pretty bland about the use of and the difference between both of the two techniques taught on Tutorial– hard to figure out how to use & what’s the difference between them. While, when I worked as an evaluator, they became clearer.

1) What kinds of information and insights did it give you about the useability of the prototype?

For user observation: visual information( frowning, smiling, surprised, and furrowed brow etc.) is directly given through their faces. Plus, the feedback & insights( unhappy, happy, unexpected, concentration, and impatience etc.) could be observed at the same time.

For think aloud: verbal information( demonstrating what the user is thinking at the moment) is given directly through users’ oral expression, which provides observers with more reliable truth about the real situation of mind of the specific user.

2) What aspects of the technique worked well or were frustrating?

For user observation: It worked well for most of the time we did user research because of its great efficacy through read users’ faces. But it is also misleading owing to observers’ different understandings of users’ facial expressions– sometimes it did lead to frustrating results.

For think aloud: Although thinking aloud provides observers with more reliable truth, it indeed have a con– there is a situation that– even the user himself/ herself could not display his/ her feelings through their verbal expressions…

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