Which of the Following Best Addresses the Nature of the Threat

question 140

Multiple Choice

Which of the following best addresses the nature of the threat to internal validity that is caused by maturation?

• A) changes in how variable is measured during the course of the study
• B) the differential dropping out of the participants from a study
• C) an unexpected or unrelated event occurring during the study that could influence responses
• D) physiological changes occurring in participants during the course of the study

---

Definitions:

Groundwater

The water found underground in the cracks and spaces in soil, sand, and rock.

Evaporation

The process by which liquid water transforms into vapor or gas, often driven by heat from the sun.

Precipitation

Any type of water, whether in liquid or solid state, descending from the sky to the earth's surface, encompassing phenomena like rain, snow, sleet, and hail.

Acre-Foot

A unit of volume used in the United States to measure large-scale water resources, such as in reservoirs or irrigation, equal to the volume of water required to cover one acre of land one foot deep.