If we select participants on the basis of extremely high or low scores on a test, the most likely threat to validity is

A) testing bias.
B) diffusion of treatment.
C) attrition.
D) regression to the mean.


Answer: D

Political Science

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Mexico's level of social development

a. is lowest along the US–Mexican border due to the exploitative employment practices of the maquilodoras. b. has a regional dimension with southern areas of the country being significantly better off than central and northern areas. c. is lower and distributed less well in comparison to many Latin American states. d. is lower due to the large numbers of people living in urban areas where they overwhelm Mexico's government programs. e. was relatively unaffected by the 1980s economic crisis.

Political Science

The lobbying firm, Cassidy and Associates, securing federal money for a university to construct a nutrition center is an example of

A. a logroll. B. a dovetail. C. an earmark. D. a scratched back. E. a tag line.

Political Science

Pluralist theory proposes that people's interests are protected by

A) interest groups. B) political parties. C) the majority. D) elected representatives. E) elites.

Political Science

What are the requirements set down in Article III of the Constitution that one must meet if one wishes to become a federal judge?

a. natural-born citizen, thirty years old, law degree b. American citizen, thirty years old, admitted to the bar c. American citizen, no criminal record, law degree d. no criteria are provided by Article III e. natural-born citizen, no minimum age, minimum three years judicial experience

Political Science