Dr Taylor Is Conducting a Study to Test the Effect

question 153

Multiple Choice

Dr. Taylor is conducting a study to test the effect of a new drug on people's ability to concentrate at work. His research sample consists of 100 US adults. During a 14-week period, half of the sample is administered the drug and the other half is administered a placebo, and participants' concentration abilities are continually tracked. In the context of this study, if Dr. Taylor uses random assignment, it means that ____.

• A) his study will be high in external validity
• B) the 100 adults in his study are likely to be representative of the larger population of interest
• C) each research participant has an equal chance of being assigned to each level of the independent variable
• D) his research findings are likely to be statistically significant

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Definitions:

Radioactive Isotope

An isotope of an element that has an unstable nucleus and emits radiation during its decay to a stable form.

Greenhouse Effect

The process by which radiation from a planet's atmosphere warms the planet's surface more than it would without this atmosphere, largely due to greenhouse gases.

Troposphere

The lowest layer of Earth's atmosphere, where weather happens and where most of the planet's atmospheric water vapor exists.