Which of the following findings presents a serious challenge to the theory of schizophrenia that proposes an excess amount of dopamine to be at the core of this disorder?
a) Antipsychotic drugs relieve the symptoms of both drug psychoses and the psychosis of schizophrenia.
b) Homovanillic acid, the major metabolite of dopamine, is not present in greater amounts in schizophrenics.
c) Positive symptoms of schizophrenia are reduced by antipsychotic drugs more than negative symptoms.
d) None of the above represents a challenge to the dopamine activity theory.
Question 2
The technique of systematic desensitization is based on the theory that relaxation is
a) more natural than fear.
b) reinforced by attention.
c) incompatible with previously learned anxiety.
d) the ideal behavioral response to environmental situations.
Schizophrenia
Explaining “Moving Continents”— The Theory of Plate Tectonics
Applying Signal Detection Theory
Four kinds of evidence supporting the theory that species evolve.
Gate control theory. A. open gate, B. closed gate
Modern Cell Theory