Tamara's class experiment involves measuring reaction time. She uses one timer for the experimental group and a second timer for the control group. Conducting the experiment this way can possibly introduce a confound based on:

Question

Quizplus · Accepted Answer

Using different timers for the experimental and control groups can introduce confounding due to instrumentation, as the different timers may not be equally accurate or precise. This could cause differences in reaction time between the groups that are not due to the manipulation being tested. Mortality, statistical regression, and maturation are not relevant confounding variables in this experiment.

Tamara's Class Experiment Involves Measuring Reaction Time