To Make Sure That Groups of Participants in an Experiment

question 157

Multiple Choice

To make sure that groups of participants in an experiment are not generally different from each other before the experiment begins, the experimenter ____.

• A) uses an objective observer to assign participants to groups
• B) uses random assignment to assign participants to groups
• C) assigns participants to groups by himself or herself without interference by anyone else
• D) assigns participants to groups on the basis of an unimportant trait such as hair color

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Definitions:

Potential Soldiers

Individuals who are eligible and might be considered for military service in the event of a need or draft.

Living Standards

The level of wealth, comfort, material goods, and necessities available to a certain socioeconomic class or a geographical area.

Population Growth

The increase in the number of individuals in a population, often measured by the rate at which the number of individuals increases in a specific time period.

Biodiesel

A renewable, clean-burning diesel substitute produced from a diverse mix of feedstocks including vegetable oils, animal fats, or recycled restaurant grease.