Can you train a kid to hate sugar? Karl Duncker was a psychologist prowling around Britain in the 1930s. He was a master researcher on peer pressure who offered London children fictional “hemlock” to see if he could sway them to avoid sugar.
"Thinking outside the box," has become the annoying phrase we hear in commercials and bad business meetings. It stems from an actual psychological concept called functional fixedness. Funnily enough, the classic experiment to demonstrate functional fixedness required people to think inside the box.