User testing asking experienced users to bring frustrating test cases?

1. What are the four 4 principles of usability testing?
2. What kind of testing is done to provide a good user experience?

What are the four 4 principles of usability testing?

1) Determine whether testers can complete tasks successfully and independently. 2) Assess their performance and mental state as they try to complete tasks, to see how well your design works. 3) See how much users enjoy using it. 4) Identify problems and their severity.

What kind of testing is done to provide a good user experience?

Usability testing is important for creating an optimal user experience and should be done early and often during the design process.