Ethologist Irenaus Eibl-Eibesfeldt (1963)raised Rats in Isolation

question 139

Multiple Choice

Ethologist Irenaus Eibl-Eibesfeldt (1963) raised rats in isolation.When other rats were finally introduced into their cages,rats raised alone _______,suggesting that _______.

• A) fled from the new rats; aggression must be learned.
• B) used the same aggressive behaviours as other rats; aggression need not be learned.
• C) did not aggress against them; instrumental aggression does not exist in nonhumans.
• D) could not defend themselves; aggression is learned.
• E) become more aggressive than other rates; isolation leads to aggression.