Research Results Can Be Influenced If a Researcher Unconsciously Behaves

question 215

Multiple Choice

Research results can be influenced if a researcher unconsciously behaves differently toward subjects in the various groups based on his or her preconceived notions. This is called

• A) experimenter bias.
• B) demand characteristics.
• C) selection bias.
• D) the placebo effect.

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Definitions:

Aerobic Exercise

Physical activity that improves cardiovascular health by increasing the heart rate and oxygen intake for a prolonged period.

Anxiety

A feeling of worry, nervousness, or unease about something with an uncertain outcome.

Body Mass Index (BMI)

A measure of body fat based on height and weight that applies to adult men and women.

Overweight

Having more body fat than is optimally healthy, considered as having a body mass index (BMI) over 25.