Professor Golder Is Studying Hyperactivity in Preschool-Age Children

question 98

Multiple Choice

Professor Golder is studying hyperactivity in preschool-age children. She is concerned that differences in child rearing, diet, and so forth may affect her results. To minimize these potential preexisting variables, she should be sure to do which of the following?

• A) Use random assignment when forming her groups.
• B) Include an independent variable.
• C) Include a dependent variable.
• D) Assign boys to the experimental group and girls to the control group.

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Definitions:

Predation

A biological interaction where one organism, the predator, kills and eats another organism, its prey, as a means of obtaining energy.

Biotic Potential

The highest possible rate of reproduction for a living being when the environment is most favorable.

Environmental Resistance

The sum of environmental factors (like predation, disease, and competition) that limit the growth of populations within an ecosystem.

Mortality

The state of being subject to death or the incidence of death within a population.