(STUDY FINDS) -- NEW BRUNSWICK, N.J. — We’ve all done it. For many of us, it’s something that happens everyday almost automatically. After working on an important project or task for a little while, you decide to take a break — only to pick up your smartphone and start browsing social media, read email, check out the news and maybe get in a quick round of Candy Crush Saga. Taking a break is supposed to be a time to relax and mentally recharge so that you can go back to your work with a fresh perspective. However, a new study out of Rutgers University finds that cellphone use during a mental break doesn’t really allow the brain to relax and can actually result in a poorer performance.