Which of the Following Observations Is an Example of a Positive

question 47

Multiple Choice

Which of the following observations is an example of a positive correlation?

• A)When members of a population consume fewer fruits and vegetables,their risk of high blood pressure increases.
• B)When a group of children increases their physical activity levels,the percentage of the children who contract cold infections decreases.
• C)When women gain less weight than average during pregnancy,the birthweights of their babies tend to be lower than average.
• D)When a population's intake of green tea increases,the percentage of lung cancer cases in that population decreases.

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Definitions:

Polygraph

A lie detector test that measures and records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity while the subject is asked and answers a series of questions.

fMRI

Functional Magnetic Resonance Imaging, a non-invasive neuroimaging technique that measures brain activity by detecting changes associated with blood flow.

PET Scan

A diagnostic imaging test using a radioactive substance to visualize and measure metabolic processes in the body.

Brain Activity

The various physiological and biochemical processes that occur within the brain to support thought, perception, and behavior.