Have you ever walked into Costco planning to buy just one or two things and walked out with a cart full of stuff you don't need? Discover the Costco Effect—how anchoring, scarcity, and priming trick your brain into overspending. Learn the psychology behind shopping smarter.

Do you think retailers have the power to prime your brain? More likely than not, it happened the last time you went to the grocery store.

We'd all like to think our thoughts and decisions result from a conscious deliberate process. But, research says otherwise.