Harry Harlow and His Colleagues Completed a Number of Studies

question 218

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 was interested in which of the mothers the infant monkeys would seek out when they were startled or frightened. In these studies the dependent variable was the:

• A)material from which the surrogate was made.
• B)surrogate that the infant monkey preferred when it was startled.
• C)age of the infant monkey at the time of the test.
• D)length of time the infant monkey spent exploring the cage.

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Definitions:

Vagus Nerve

The tenth cranial nerve that innervates digestive organs, heart and other areas, and is part of the parasympathetic nervous system.

Reflexes

are involuntary and nearly instantaneous movements in response to a stimulus as part of the body's defense mechanism.

Blood-Brain Barrier

Permeability barrier controlling the passage of most large-molecular compounds from the blood to the cerebrospinal fluid and brain tissue; consists of capillary endothelium and may include the astrocytes.

Caffeine

A stimulant found in coffee, tea, chocolate, and certain medications that can enhance alertness and reduce feelings of tiredness.