Anyone who has done user research is familiar with Murphy's Law – the participant doesn’t show up on time, the test equipment fails (it was working this morning!) – and the list goes on.
For online testing, the main things to cover are:
For more on handling problems during a test, see Checking for technical problems in Chapter 10 and Monitoring the test's progress in Chapter 11.
For tips on testing people in person, see Recruiting for in-person sessions.
Next: Documenting our plan