A Researcher Studies the Effect of Exercise on Stamina

question 47

Multiple Choice

A researcher studies the effect of exercise on stamina. Participants are randomly assigned to be in an exercise or no-exercise group for 12 weeks. Stamina is then measured by how long participants can walk comfortably on a treadmill. In this study, the dependent variable is

• A) the number of minutes participants spend comfortably on the treadmill.
• B) whether the participants are in the exercise program or not.
• C) the heart rate during the exercise program.
• D) whether the duration of the exercise program is 12 weeks or longer.

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Definitions:

Double-blind Test

An experimental procedure in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias in research results.

Single-blind Test

An experimental setup where the participants do not know which group (control or experimental) they belong to, but the researchers do.

Observational Study

A study in which a researcher carefully and systematically observes and records behavior without interfering with the behavior; it may involve either naturalistic or laboratory observation.

Exploratory

Research designed to investigate an area or phenomenon that is not well understood, often used to generate hypotheses for further study.