A Researcher Is Testing If Caffeine Makes People More Talkative

question 92

Multiple Choice

A researcher is testing if caffeine makes people more talkative.Some of the participants are given regular coffee to drink and some are given warm milk.The assistant then interviews the participants and counts the number of words each speaks during the interview.What seems to be missing from the design?

• A)a hypothesis
• B)a placebo control
• C)a dependent variable
• D)an independent variable

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