“ The "real world" is a construct, and some peculiarities of scientific thought become more intelligible when this fact is recognized ... Einstein himself in 1926 told Heisenberg it was nonsense to found a theory on observable facts alone, saying "In reality the very opposite happens. It is theory which decides what we can observe." ” - D. O. Hebb

This section contains information about psychological disorders.  Now either click on "An initial series of important general comments" below to look at some important orientating points about diagnosis, general approach to symptoms, and treatment choice, or click on "Specific disorders" to move straight to more detailed information about individual diagnoses.