An Experimenter Conducts a Study in Which She Wants to Investigate

question 22

Multiple Choice

An experimenter conducts a study in which she wants to investigate the effects of eating chocolate on concentration.To do this she gives 20 people in an experimental condition a bar of chocolate and gives another 20 people in a control group nothing.After the experimental group has finished their chocolate she asks both groups to perform tasks designed to test their concentration.Which of the following statements is false?

• A)The experiment has a within-subjects design.
• B)The results could be analysed using a t-test.
• C)The independent variable has two levels.
• D)The dependent variable is level of concentration.
• E)The addition of a control group controls for threats to internal validity.

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Definitions:

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The 32nd President of the United States (1933-1945), known for leading the country during the Great Depression and World War II through his New Deal policies.

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