Which of the Following Is a Common Threat to the External

question 32

Multiple Choice

Which of the following is a common threat to the external validity of a study?

• A) Selection biases.
• B) Attrition rates.
• C) Sample characteristics.
• D) Repeated testing.

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Definitions:

Subduction

The process along a convergent plate-tectonic boundary in which an oceanic lithospheric plate descends beneath the overriding plate.

Tectonics

Earthquakes, volcanoes, and other processes that deform Earth’s crust and mantle; syn. tectonic activity.

Structural Features

Physical characteristics that define the shape, configuration, or distribution of a geological formation or system.

Earth's Surface

The outermost layer of the Earth, consisting of the crust and the uppermost mantle, upon which all terrestrial landscapes and human activity occur.