Gretchen Rubin realized that by asking the seemingly dry question "How do I respond to expectations?" we gain explosive self-knowledge.

She discovered that based on their answer, people fit into Four Tendencies: Upholders, Questioners, Obligers, and Rebels.

Our Tendency shapes every aspect of our behavior, so using this framework allows us to make better decisions, meet deadlines, suffer less stress, and engage more effectively.