Question 1
A researcher is studying two groups of children. One group includes children who are 10 years old and the other group includes children who are 5 years old. Which variable would be confounded with age in this study?
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gender◦
height◦
aggression◦
incomeQuestion 2
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 standard rat food. What types of groups are represented in this study?
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The high-protein group is an experimental group; the standard food group is a control group.◦
Both groups are experimental groups.◦
Both groups are control groups.◦
The high-protein group is a control group; the standard food group is an experimental group.
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