However, Angela Lee Duckworth from the University of Pennsylvania has found that this power is overrated. The link between our IQs and our fates becomes muddier when we consider motivation – an aspect of test-taking that is often ignored. Simply put, some people try harder in IQ tests than others. If you take this into account, the association between your IQ and your success in life becomes considerably weaker. The tests are not measuring intelligence alone, but also the desire to prove it.