Setting usability tasks for participants to test a website

1. What are the four 4 principles of usability testing?

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.