The five characteristic symptoms for the diagnosis of schizophrenia
with the requirement that at least twoof these symptoms be present for
a month will be retained in DSM-5 (Table 1). Three changes are made
and include the elimination of the special treatment of bizarre delusions
and Schneiderian “first-rank” hallucinations, clarification of the definition
of negative symptoms, and the addition of a requirement that at
least one of the minimum two requisite characteristic symptoms must
be delusions, hallucinations, or disorganized speech.