The rat's desire to eat is waning. All creatures, according to Hull and Spence, desire to minimize their urges (drive reduction theory).
It asserts that organisms are driven to weaken their urges to preserve homeostasis. Any internal state that propels an organism to meet a need is referred to in this context as a drive. Drive-reduction theory postulates that reducing "drives" is the main driving force underlying all human behavior.
The core notion of drive reduction theory is homeostasis. In other words, people are drawn to actions that can help them achieve a state of balance in their bodies and minds. The fundamental tenet is that your biological requirements drive your motivation.
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