In an Experiment, the Purpose for Manipulating the Independent Variable

question 33

Multiple Choice

In an experiment, the purpose for manipulating the independent variable is to help ____.

• A) establish the direction of the relationship by showing that the dependent variable changes when you manipulate the independent variable
• B) eliminate the third variable problem because you decide when to manipulate rather than waiting for the variable to change
• C) establish the direction of the relationship and help eliminate the third variable problem
• D) ensure that any effects of selection bias or other randomization failures are minimized

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Definitions:

NLF Headquarters

The central operation location for the National Liberation Front, primarily known during the Vietnam War as a political organization and guerrilla warfare force.

John Ehrlichman

A key advisor and assistant to President Richard Nixon, primarily involved in domestic affairs and later linked to the Watergate scandal.

Plumbers

Individuals skilled in installing and maintaining systems used for potable (drinking) water, sewage, and drainage in plumbing systems; also refers to a covert White House Special Investigations Unit during the Nixon administration.

Daniel Ellsberg

A former United States military analyst who, during the Vietnam War, released the Pentagon Papers, a top-secret Department of Defense study of U.S. political and military involvement in Vietnam, to the public.