Ron is conducting an experiment that lasts several hours. During part of the experiment, a noisy power saw operates outside the room. Ron is concerned that responses may be influenced by the power saw instead of his independent variable. This example illustrates the potential problem of
A) instrumentation.
B) testing.
C) history.
D) selection.

Question

Quizplus · Accepted Answer

The noise from the power saw is an external event that could affect the experiment's outcome, which is an example of a history effect.

Ron Is Conducting an Experiment That Lasts Several Hours