Which of the Following Represents a Valid Method of Manipulating

question 4

Multiple Choice

Which of the following represents a valid method of manipulating the independent variable?

• A) Selecting from a naturally occurring group
• B) Providing varying degrees of a given condition to different groups
• C) Allowing subjects to choose the treatment they prefer to receive
• D) Allowing each experimenter to decide which of the treatments they would prefer to administer

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