adoption study A01 Flashcards
what is the aim of this study
to see how many adopted children with biological mothers who had schizophrenia would go on to have schizophrenia themselves
what years were the experimental subjects born between
1915 and 1945
where was it the mothers were confirmed to be confined to
an oregon state psychiatric hospital
why had the children been adopted at birth
due to the mothers suffering with schix
what was there no attempt of assessing
the psychiatric status of the father
the matched group had how many adoptees and what were their mothers believed to be
50, mentally healthy
what were the control subjects matched for
sex and type of eventual placemtns(adoptive,foster family)
why were the control subjects matched for sex
as males predominantly suffer with schizophrenia more
when the subjects were located what were they contacted by and what were they asked to participate in
a letter , a personal interview
why were the adults interviewed
in order to see whether any of them had gone on to develop schizophrenia themselves
where were nearly all of the interviews conducted and what did this add to
in the homes of the subjects , added to the range of possible observations
the information compiled on each subject was evaluated blindly and independently by how many researchers
2 psychiatrists but a final evaluation was made by a third researcher
what was the risk of developing schizophrenia if one parent has it
10%
what was the rationale of this study
if there was no genetic influences on schizophrenia we would expect none to develop the condition
what would we expect the percentage to be of the children with biological mothers with schizophrenia to develop
10%
in the control group it was essential to
eliminate that adoption itself might be responsible for schizophrenia
results-of the 47 adults interviewed whose mothers suffered from schizophrenia how many of them had been hospitalised with schizophrenia
5
results- how many of them were chronically ill
3
results- how many of the adopted children of schizophrenia mothers develop schizophrenia
10%
results-in the control group how many of them developed schizophrenia
none
what was the conclusion for this study
no evidence emerged from this study of any role at all for environmental factors in the development of schizophrenia
