Abstract

Today the concept of 'schizophrenia' is often presented in psychiatric texts as a construct, a construct bringing together a diverse and, allegedly, independently assailable range of signs and symptoms. According to such a diagnostic scheme two patients may both be allowed to count as suffering from schizophrenia despite sharing hardly a single symptom. The validity of the concept has accordingly been contested by psychologists for its apparent lack of unity. In the absence of clear independent evidence of a unitary physiological disease process underlying such diverse phenomena, a natural enough suggestion has been to...