Which psychological principle did Thomas Edison deliberately use when demonstrating his phonograph invention to maximize public excitement and adoption?

Throughout history, many groundbreaking inventions succeeded not just because of their technical innovation, but because their creators understood fundamental principles of consumer psychology. This trivia explores how inventors and product developers have leveraged psychological insights to transform their discoveries into world-changing products. Test your knowledge about the intersection of human behavior and invention success!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

The von Restorff effect (distinctiveness) - he ensured his invention stood out by performing demonstrations with familiar songs that suddenly spoke words
The peak-end rule - he structured demonstrations to create an emotional peak moment when audiences heard their own recorded voice for the first time
Social proof - he only demonstrated the phonograph to influential people first, creating a sense of exclusivity and desirability
The IKEA effect - he had participants help assemble parts of the phonograph before demonstrations to increase their psychological investment