Upon reading the NYTimes Sunday Review article "The Power of Concentration" by Maria Konnikova, it was no surprise to read this part of it:

“Multitasking is a persistent myth. What we really do is shift our attention rapidly from task to task. Two bad things happen as a result. We don’t devote as much attention to any one thing, and we sacrifice the quality of our attention.”

Also in the article, learn how Sherlock Holmes used meditation and mindfulness in his work. Fascinating.