Dr Shang Is Studying the Effects of Caffeine on Hunger

question 118

Multiple Choice

Dr. Shang is studying the effects of caffeine on hunger. He hypothesizes that people who ingest more caffeine experience less hunger pangs throughout the day. He designs a study where one group of participants is given caffeine throughout the day, and the other group is not allowed to have any caffeine. He then has the two groups journal their hunger pangs throughout the day and he compares the results. In this study, the independent variable is the:

• A) number of hunger pangs a participant experiences.
• B) amount of caffeine a person ingests.
• C) time of day when the hunger pangs happen.
• D) age of the participant.

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Definitions:

Cause-and-Effect

Cause-and-effect refers to the relationship between events or things, where one is the result of the other or others, typically serving as the reason something happens.

Experimental Method

A research technique in which an investigator manipulates one or more factors (independent variables) to observe the effect on some behavior or mental process (the dependent variable).

Correlational Studies

Research methods that examine the relationship between two or more variables to determine if a change in one variable is associated with a change in another.

Cause-and-Effect

A relationship where one event (the cause) directly results in another event (the effect).