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Effective Mind Control: A Biological Theory of Motivation
Most theories of motivation evolve from biological studies. This article identifies a handful of these theories including intuition theory, instinct theory, drive reduction theory, and psychoanalytic theory.
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George Washington University: Anxiety
Are you anxious? This site from the George Washington University briefly describes anxiety and offers a few techniques for reducing the feeling of anxiety in the classroom.
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Tip: Drive Reduction Theory
This site from the Theory Into Practice Websit provides scientific explanation of the drive reduction theory proposed by American psychologist Clark Hull. Good example and list of main principles.