Overall, Rats That Received a Drug Took Longer to Find

question 83

Multiple Choice

Overall, rats that received a drug took longer to find their way out of a maze than rats that received a placebo, F (1, 57) = 7.23, p < 0.05; the drug had a large effect on albino rats and virtually no effect on wild-bred rats, F (1, 57) = 11.01, p < 0.05.However, there was no overall difference in the time of albino rats compared to that of wild-bred rats, F (1, 57) = 1.11, p > 0.10.Which effect(s) must be present for these results to be true?

• A) main effect of drug
• B) main effect of rat species
• C) interaction of drug and rat species
• D) main effect of drug and an interaction of drug and rat species

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