Board Certified Behavior Analyst (BCBA) — Question 7

An experimenter examines the level of noise in a school bus full of children under the following conditions: baseline, rock music, baseline, classical music. In this experiment, the dependent variable is:

Answer options

• A. Time
• B. The number of children on the bus
• C. The level of noise
• D. The type of music

Correct answer: A

Explanation

The correct answer is A, as time refers to the different conditions under which the noise levels are measured. The number of children on the bus (B) and the type of music (D) are independent variables, while the level of noise (C) cannot be the dependent variable since it is the outcome being measured in relation to the other factors.