Which of the following threats to external validity occur if the researcher interacts differently with different subjects?

a) reactive arrangements
b) multiple treatment interference
c) experimenter effects
d) pretest sensitization

c

Political Science

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Which of the following is a major responsibility of state and local governments?

A. economic development. B. providing public services. C. disaster relief. D. all of the above

Political Science

According to _____________________________ organizations such as the United Nations and the European Union help states overcome many of the uncertainties of international anarchy to achieve cooperative outcomes

Fill in the blank(s) with correct word

Political Science