Harry Harlow and His Colleagues Completed a Number of Studies

question 251

Multiple Choice

Harry Harlow and his colleagues completed a number of studies in which baby macaque monkeys were raised with two artificial surrogate mothers. One of the mothers was made of wire, and the other was made of soft cloth. Either mother could provide food. Harlow found that when the infant monkeys were startled or frightened, they:

• A)preferred whichever surrogate that provided food.
• B)avoided both surrogates and huddled in a corner.
• C)preferred the cloth surrogate, even if it provided no food.
• D)showed no clear preference, and ran to whichever surrogate was closer.

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Definitions:

Pelvis

The lower part of the torso in human and vertebrates, comprising hip bones surrounding and protecting organs in the abdominopelvic cavity.

Foramen Magnum

The large opening at the base of the skull through which the spinal cord passes to connect with the brain.

Bipedalism

The ability to walk on two legs, a characteristic feature of humans and our ancestors that allows for a range of motion and energy efficiency.

Hominids

A family of primates that includes humans, their ancestors, and other extinct related species, characterized by bipedalism, large brains, and complex behavior.