An experiment is designed to measure the effect of two different methods of presenting volleyball knowledge. The dependent variable is written test scores. Of the following variables, which would be the most important to control?
A) Height
B) Socioeconomic status
C) Emotional stability
D) Intelligence

Question

Quizplus · Accepted Answer

Intelligence is the most important variable to control in this experiment because it directly affects the ability to learn and retain information, which is being measured through written test scores. Controlling for intelligence ensures that differences in test scores are more likely due to the presentation methods rather than variations in participants' innate ability to understand and remember the volleyball knowledge.

An Experiment Is Designed to Measure the Effect of Two