Leonard Heston conducted an adoption study of the possible causes of schizophrenia. What was the major finding in his study?
a. There was no evidence of a genetic influence on schizophrenia.
b. Adopted individuals had higher rates of schizophrenia regardless of the mental health status of their parents.
c. An individual's childhood environment has a much greater impact on the incidence of schizophrenia than do genetic factors.
d. Adopted children whose birth mothers were schizophrenic developed schizophrenia at a higher rate than did children born to normal mothers.
Answer: d.
You might also like to view...
Which of the following drugs may be used to treat depression?
A. Valium B. Prozac C. Ritalin D. Lithium
Both positive and negative reinforcement increase the probability of a behavior
a. True b. False Indicate whether the statement is true or false
Due to social movements within the African American community, African American adolescents __________.
A. show few self-esteem differences when compared with white adolescents B. have lower self-esteem compared to white adolescents C. demonstrate a stronger sense of racial identity and a higher level of self-esteem when compared with Hispanics D. demonstrate a weaker sense of racial identity and a higher level of self-esteem when compared with Asian Americans
Functionalism is demonstrated by __________.
A. no brain differences between different songbird species B. same-sized spatial reasoning areas in the brains of members of a species that primarily hunts and one that does not C. more activity in the emotional brain centers in an aggressive species D. equal levels of activity in the emotional brain centers for calm and aggressive species