There was a recent article on LinkedIn that talked (anecdotally) about the same ...

jobu on Aug 30, 2013 | parent | context | favorite | on: How Poverty Taxes the Brain

There was a recent article on LinkedIn that talked (anecdotally) about the same taxing on the brain for people that have limited time (http://www.linkedin.com/today/post/article/20130627224702-13...)