Although studying is considered a legitimate scientific nowadays, it is still a very young one. In the early 1970s, a psychologist named J. Guilford was one of the first academic researchers who dared to conduct a study of creativity. One of Guilford’s most famous studies was the nine-dot puzzle.
He challenged research subjects to connect all nine dots using just four straight lines without lifting their pencils from the page. Today many people are familiar with this puzzle and its solution. In the 1970s, however, very few were even aware of its existence, even though it had been around for almost a century. If you have tried solving this puzzle, you can confirm that your first attempts usually involve sketching lines inside the imaginary square. The correct solution, however, requires you to draw lines that extend beyond the area defined by the dots.