While the shortcomings of our current diagnostic approach to
schizophrenia are presently easy to enumerate, it is rathermore difficult
to come up with an approach that is more valid, more clinically useful,
and more reliable all at the same time. Starting with DSM-III, both
DSM and ICD systems have promoted better diagnostic agreement
(reliability) and thereby improved diagnostic communication and consistency
of health statistics reporting across the world. The validity of
our construct of schizophrenia has, however, been increasingly drawn
into question (Hyman, 2010; Insel, 2010).