________ Refers to an Extraneous Variable That Occurs When Test

question 23

Multiple Choice

________ refers to an extraneous variable that occurs when test units with extreme scores move closer to the average score during the course of the experiment.

• A) Statistical regression
• B) Instrumentation
• C) Selection bias
• D) None of the above

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Definitions:

African Savanna

A grassland ecosystem located in Africa, characterized by open landscapes, diverse wildlife, and seasonal rainfall.

Fire

A rapid, persistent chemical change that releases heat and light and is typically initiated by ignition of combustible material.

Nitrogen

A chemical element with symbol N and atomic number 7, which is a critical component of all living cells, notably in proteins and nucleic acids.

Denitrification

A microbial process that converts nitrate in the soil to nitrogen gas, releasing it into the atmosphere and reducing soil fertility.