When a change in the dependent variable could be due to internal changes within the participant that occurred over time, __________ is a threat to internal validity
a. history
b. maturation
c. regression to the mean
d. selection
B
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The Founders did not include in the U.S. Constitution an explicit statement of state powers but added it later in
A. the Second Amendment. B. the Seventh Amendment. C. the Tenth Amendment. D. the Fourteenth Amendment. E. None of these are correct.
Income taxes are the largest source of revenue for local governments in the United States
Indicate whether this statement is true or false.
Canada and Germany are similar to the United States in that they both are organized along a federal system
Indicate whether the statement is true or false
Which of the following in Congress benefit the most from PAC money?
A) incumbents B) liberals C) conservatives D) independents E) graduate students