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What Are the Roles of the Independent Variable and the Dependent

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What are the roles of the independent variable and the dependent variable in an experiment?


Definitions:

Pineal Gland

A small endocrine gland in the brain that produces melatonin, a hormone that regulates sleep patterns.

Melatonin

A hormone produced by the pineal gland that regulates sleep-wake cycles.

Seasonal Affective Disorder

A type of depression that occurs at a specific time of year, usually in the winter, when there is less natural sunlight.

Depression

A common and serious mood disorder that causes persistent feelings of sadness and loss of interest.

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