Beginning a class or school year with this question would serve as a basis for teaching the specific students. Keeping this board up all year would also serve as a reminder to the importance of art. Also, allowing students to read what their peers have written might create critical thinking that they did not initially think of.
Art is healing in and of itself and is a great resource in therapy. 'It's a whole-brainer'. This graphic shows how art effects the brain and highlights ways that it could be incorporated into therapy; for example for reflection or problem-solving, etc.