The elation of winning something really important evaporating more rapidly than one's expectation is best explained by:

Question

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The adaptation-level phenomenon refers to the tendency of humans to quickly adapt to changes in their environment or circumstances, and eventually return to a baseline level of happiness or satisfaction. In the context of winning something important, the initial elation and excitement may quickly fade as the person adapts to the new state of being a winner and returns to their baseline level of happiness.

The Elation of Winning Something Really Important Evaporating More Rapidly