A researcher wants to see if a protein-enriched diet will enhance the maze-running performance of rats. One group of rats is fed the high-protein diet for the duration of the study; the other group continues to receive ordinary rat chow. In this experiment, the rats' maze-running performance is the
a. correlated variable.
b. control variable.
c. dependent variable.
d. independent variable.
C
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Neka's doctor advises that she spend two weeks on bed rest because Neka's blood pressure is quite high and the doctor is worried that Neka might develop preeclampsia. Neka agrees and gets better. This is an example of the body's malleability or the idea that development is plastic. Explain.
What will be an ideal response?
Which group shows the greatest variations in cognitive performance?
A. young adults B. middle-aged adults C. adults age 85-90 D. adults age 100 or older
Which statement concerning gender differences and school achievement differences is most accurate?
a. Girls achieve higher grades than boys do. b. Boys are less likely to have learning disabilities. c. Girls are more likely to drop out of school. d. Boys are less likely to be held back a grade.
In the last half of the twentieth century and the first several years of the twenty-first century, U.S. high school dropout rates
A. increased B. plateaued. C. remained unchanged. D. declined.