Does multitasking seem to be getting tougher for you as the years pass? In fact, that’s quite normal. By the time you are 40, multitasking is nearly twice as challenging as when you were 20. The good news is that playing a video game has just been shown to improve cognitive function and, in particular, multitasking ability in healthy older adults. Adults subjects from 60 to 85 years old became as effective at multitasking as 20 year-olds after just a month of training, according to a new UCSF study.