IQ tests, which measure our ability to retain information, are out-dated. In the digital era, the new IQ is not about retaining knowledge, but managing it.Working memory is the brain’s Post-It note. It allows us to make mental scribbles of what we need to remember and process. The bigger the ‘Post-It’ we have, the more proficient a multi-tasker we are. And in a modern world, where technology and busy lives place an increasing strain on our working memory’s capacity, its strength be...