Discuss How Natural Selection Has Likely Influenced the Evolution of Skin

question 23

Essay

Discuss how natural selection has likely influenced the evolution of skin color in humans.

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Definitions:

Stimulus Chaining

involves teaching a sequence of actions by reinforcing each behavior with the opportunity to perform the next behavior until the final action is achieved.

Higher-order Conditioning

A learning process wherein a conditioned stimulus is paired with a new neutral stimulus, creating a second (often weaker) conditioned response.

Higher-order Conditioning

A complex form of classical conditioning where a stimulus previously paired with a primary unconditioned stimulus becomes a conditioned stimulus for further training.

Extinction

In psychology, the process through which a conditioned response decreases or disappears after the conditioned stimulus is repeatedly presented without the unconditioned stimulus.