1. What are the variables that are under investigation in this study?

Ciccarelli: Psychology_5 (5th Edition)
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Author:Saundra K. Ciccarelli, J. Noland White
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Chapter1: The Science Of Psychology
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In a study with a similar design as the previous example, researchers looked at the effects of nutrition on reading ability. In Group A, children ate at least three ounces of dark green vegetables every day for one month. In Group B, children were fed their regular diet. At the end of the month, the children took a reading comprehension test. Those who ate the green vegetables every day for one month (Group A) did not vary in their test socres when compared to Group B.

1. What are the variables that are under investigation in this study?

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