What does the research say about willpower as a resource?
Research, particularly Baumeister et al.'s ego depletion studies, indicates that self-control tasks can deplete performance over time. While the exact mechanism is debated, the implication is clear: relying on willpower for frequent behavioral demands leads to declining performance.
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This is one answer. The complete system — the psychology, the biology, and the method — is in the book.
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