“…That is, paranoid schizophrenia would be expected to occur at a later age, since paranoid patients are characterized by a higher developmental level than nonparanoid patients (Eysenck, 1961;Freud, reviewed in Swanson et al, 1970;Swanson et al, 1970;Zigler et al, 1976Zigler et al, , 1977. However, several studies (reviewed by Zigler et al, 1976) have failed to confirm this diagnostic status-developmental level relation. Furthermore, European psychiatrists (see Swanson et al, 1970, p. 28) and others (Kay, Cooper, Garside, & Roth, 1976) appear to question whether any difference in age of onset would be found between paranoid and other schizophrenic diagnoses.…”