Form of non-schizophrenic psychosis wherein indications and symptoms of standard nuclear schizophrenia exist, but there is, however, sound premorbid adjustment, abrupt development as a reaction to an obvious precipitating occurrence, as well as a decent prognosis and good likelihood of regaining ordinary levels of function. For defining characteristics, see: DSM-IV-TR diagnostic category of schizophreniform disorder. Also known as: schizophreniform state.