Evaluating Operational Definitions When an extraneous variable changes value across conditions along with the independent variable, the experiment
A)can be replicated.
B)is confounded.
C)is externally valid.
D)is internally valid.

Question

Quizplus · Accepted Answer

When an extraneous variable changes value across conditions along with the independent variable, the experiment is confounded, meaning it is no longer clear if the effects observed are due to the independent variable or the extraneous variable. This reduces the internal validity of the experiment, making it difficult to draw conclusions about causation.

Evaluating Operational Definitions When an Extraneous Variable Changes Value Across