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01-Mar-2018 21:13

The second group was told that the solution required the lines to be drawn outside the imaginary box bordering the dot array.

In other words, the “trick” was revealed in advance.

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.

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Although studying creativity is considered a legitimate scientific discipline nowadays, it is still a very young one. One of Guilford’s most famous studies was the nine-dot puzzle.Management consultants in the 1970s and 1980s even used this puzzle when making sales pitches to prospective clients.