A sleep technique used by Salvador Dalí and Thomas Edison, which involves falling asleep while holding an object that will fall and wake them up, has been found to be effective in boosting creativity. The technique, known as the hypnagogic state or N1, allows individuals to enter a state of semi-lucidity where they can imagine shapes, colors, and bits of dreams while still being aware of their surroundings. Researchers have tested this technique on 103 healthy participants and found that those who spent at least 15 seconds in the N1 stage had an 83% chance of discovering a hidden rule in a math problem. The study suggests that this sleep stage can be an 'ideal cocktail for creativity'.