Multiple Choice
Professor Middlebrain notes that rats in the first 10 cages, which were injected with salt water, are calm. Rats in the last 10 cages, which were injected with distilled water, are aggressive. He concludes that salt decreases aggressiveness. What is wrong with this study?
A) lack of random assignment
B) lack of an independent variable
C) lack of a dependent variable
D) presence of demand characteristics
Correct Answer:
Verified
Correct Answer:
Verified
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