When subjects know they are in a research study and alter their usual or routine behavior to react to the presence of the researcher, this is called _________________

Which of the following Amendments created a two-vote system for the presidential vote?

a. the First Amendment b. the Third Amendment c. the Twelfth Amendment d. the Sixteenth Amendment e. the Eighteenth Amendment

Senatorial courtesy refers to which of the following?

a) the cordiality with which senators normally treat one another b) the tradition whereby individual senators have a veto over nominees from their districts c) the legislative custom whereby the House usually accepts amendments added by the Senate to legislation initially passed by the House d) the tradition whereby the Senate can veto the governor's choices to serve on the governor's staff e) None of the above.