Describe the difference between ‘divergence testing’ and ‘convergence testing’. Is one more significant than the other?

The IQ test usually asks participants to look at a question and choose the correct answer out of a handful of answers: they "converge" on the solution. But a different kind of testing is called "divergence" testing, which involves asking a participant to, for example, list all of the uses he or she can think of for a brick, or a bed sheet.