(Scenario III) in Scenario III the Researchers Included Only Those

question 134

Multiple Choice

(Scenario III) In Scenario III the researchers included only those participants who were not regular caffeine drinkers. In doing do, the researchers:

• A) increased experimental control.
• B) minimized caffeine tolerance as an extraneous variable.
• C) increased the internal validity of the study.
• D) All of the above.

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