Q: "How do you define screen, test, assess, and evaluate?"
A: Screen, test and assess are all versions of evaluate.
Evaluate is the "parent" word that is a verb, to form an idea of the value of the subject.
A screen is a evaluation that filters a subject into two main categories - pass or fail. Another way to describe the category is - competent or not. The screen is there to look for RISK and COMPETENCE of movement. A screen is NOT for predicting injury. A movement screen does not tell us what is wrong. It only tells us that some movement is below acceptable.
An assessment is a evaluation that reveals DISABILITY. An assessment is used to tell us what is contributing to the individual having risk, or incompetence.
A test is an evaluation to tell us about the ABILITY of the individual. When an individual passes a screen, we know they are competent, but we don't know about their capacity, so we test them for ABILITY.