In Which of the Following Examples Is the Independent Variable

question 26

Multiple Choice

In which of the following examples is the independent variable manipulated by the presence versus absence technique?

• A) In one experimental condition teachers receive in-service training. In the other condition, the teachers receive no training.
• B) In one experimental condition teachers receive in-service training. In the other experimental condition the teachers receive a written training document for study.
• C) In one experimental condition, the teachers receive one day of in-service training. In the second condition, the teachers receive two days of training. In the third condition, the teachers receive three days of training.
• D) In one experimental condition teachers receive in-service training from a college professor. In the second condition, the teachers receive in-service training from a peer.

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Definitions:

Ear Infection

An inflammation of the inner, middle, or outer ear, often with infection caused by bacteria or viruses.

Excessive Crankiness

An heightened state of irritability or fussiness, often without a readily identified cause.

Audiometer

A device used to evaluate an individual's hearing ability by generating sounds at various frequencies and volumes.