M. Hambrecht, A 2ND CASE OF SCHIZOPHRENIA IN THE FAMILY - IS IT OBSERVED DIFFERENTLY, European archives of psychiatry and clinical neuroscience, 245(4-5), 1995, pp. 267-269
Comparing reports on emerging symptomatology of schizophrenia by famil
ies with and without a prior case of the disorder shows that experienc
ed families are more sensitive to delusions and hallucinations; howeve
r, they observe unspecific, affective, negative, and social/behavioral
symptoms less adequately than relatives who have no previous case of
schizophrenia in their families. The results only partly support the h
ypothesis that already-affected families tend to deny a second case. A
contrast effect of the first psychosis over the second case (as long
as it is prepsychotic) appears to be plausible also.