_______________ is a procedure used by researchers as a "virtual" and temporary method to lesion the brain that temporarily inactivates neural circuits
a. Transcranial magnetic stimulation
b. Functional magnetic resonance imaging
c. Electroencephalogram
d. Positron-emission tomography
Answer: a
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In an experiment, a researcher manipulates one variable to see how it affects a second variable. The manipulated variable is called the __________ variable.
A. dependent B. control C. independent D. hypothetical
The most common chromosomal disorder, occurring in 1 out of every 700 live births, is ________ syndrome.
A. XYY B. Klinefelter C. fragile X D. Down
Between 1830 and 1860, the significant decline in alcohol consumption in America can be attributed to
a. the early temperance movement. b. an increasing trend in tobacco use and the consequent abandonment of alcohol for cigarettes. c. a series of droughts that drastically reduced the yield of crops, such as grains and grapes, used to make alcoholic beverages. d. a drastic increase in the price of alcoholic beverages, owing to the alcohol tax. e. convincing medical evidence that chronic alcohol use is linked to oral and stomach cancers.
Which of the following statements is true of emotions?
A. Their development follows a relatively standard timeline, beginning in early infancy. B. Their physical manifestations and impact on behavior tend to be similar for all individuals. C. They involve purely objective reactions to experience. D. They seldom involve any overt behavioral manifestations.