But how do these tests work? Surely we all change constantly?

Firstly, psychometric tests are only part of the overall process. They are valuable in the information that we glean from them, but they MUST be accompanied with lots of time spent interacting and talking through options with a real person. When we discuss the results of the questionnaires, we stress that YOU are the final validator of your own profile. Psychometric tests should never place you in a box. Each one of us is unique and spills out of the box somewhere. However, tests do give us valuable insights upon which to build our discussion.

Secondly, most dimensions that are measured are relatively stable. We are unlikely to change diametrically over a period of time although some dimensions might modify a bit or become less radical as we grow older or mature.