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Explain the goals and results of the Little Albert study. Also, describe other efforts to apply classical conditioning principles to humans, such as desensitization.
Ice Age
A period of long-term reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers.
Derived Trait
A trait that is present in an organism but was absent in the last common ancestor of the group, indicating an evolutionary change.
Clade
A group of organisms that includes a single ancestor and all its descendants, representing a branch on the tree of life.
Sexual Dimorphism
The condition where the two sexes of the same species exhibit different characteristics beyond the differences in their sexual organs.
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