Parkinson's disease results from a reduction in dopamine in the brain; therefore, it would seem that the likely treatment would be to administer dopamine. Why doesn't this treatment work?
a) The blood-brain barrier prevents dopamine from entering the brain.
b) The digestive tract destroys dopamine before it can get to the brain.
c) There are no known sources of dopamine for use in such a proposed treatment.
d) The surgical intervention that must be done is more dangerous than the disease.
ANS: a
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Yang, Choe, Baity, Lee, and Cho studied the personality characteristics of Korean adolescents who were addicted to the Internet and found that Internet addicts:
a. were higher in Factor C than minimal Internet users b. were lower in irritability than minimal Internet users c. derived most of their satisfaction from Internet activity than from friendships d. were lower in anxiety than minimal Internet users
If the correlation between IQ scores of identical twins raised together is found to be +.85 and the correlation between IQ scores of identical twins reared apart is found to be +.70, the .15 difference found between the two groups is most likely attributa
a. the impact of genetics. b. the impact of the environment. c. sampling errors. d. problems with the instruments used to measure IQ.
In operant conditioning, __________
A) a neutral stimulus is paired with a conditioned stimulus that leads to a reflexive response B) babies build expectations about stimulus events, but do not influence the stimuli that occur C) infants act, and stimuli that follow their behavior change the probability that the behavior will occur again D) once a baby’s nervous system makes the connection between two stimuli, the neutral stimulus produces the behavior
In interpreting a correlation coefficient,
A) the magnitude of the number shows the direction of the relationship. B) the sign of the number shows the strength of the relationship. C) a positive sign means that as one variable increases, the other decreases. D) a zero correlation indicates no relationship.