The first group was given the same instructions as the participants in Guilford’s experiment.
Indeed, the concept enjoyed such strong popularity and intuitive appeal that no one bothered to check the facts.
Overnight, it seemed that creativity gurus everywhere were teaching managers how to think outside the box.
Management consultants in the 1970s and 1980s even used this puzzle when making sales pitches to prospective clients.
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.
If at first you feel shy, just moan or sigh while he narrates a naughty story.