A Researcher Conducting a Study Testing the Effects of Caffeine

question 39

Multiple Choice

A researcher conducting a study testing the effects of caffeine on attention is concerned about experimenter bias. The way for her to reduce this problem would be to

• A) use random assignment.
• B) use the double-blind technique.
• C) use a placebo.
• D) bear in mind the potential placebo effect.

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Gross Income

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Form 1040EZ

A simplified tax form for individual federal income tax returns filed with the IRS, designed for taxpayers with basic tax situations.

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Sixteenth Amendment

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