While Studying the Impact of Nutrition on Intelligence, a Researcher

question 17

Multiple Choice

While studying the impact of nutrition on intelligence, a researcher gives one group of rats a vitamin-rich diet while the other rat group eats Big Macs.While observing the rats run a complicated maze, the researcher notes that the vitamin-enhanced rats' maze is more brightly lit than the Big Mac rats' maze.What is the difference in lighting in this study?

• A)a hypothesis
• B)an independent variable
• C)a dependent variable
• D)a confound

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