Psychology Today summary of research that debunks the myth of multitasking, with a nifty little practical test.
Much recent neuroscience research tells us that the brain doesn’t really do tasks simultaneously, as we thought (hoped) it might. In fact, we just switch tasks quickly. Each time we move from hearing music to writing a text or talking to someone, there is a stop/start process that goes on in the brain.
That start/stop/start process is rough on us: rather than saving time, it costs time (even very small micro seconds), it’s less efficient, we make more mistakes, and over time it can be energy sapping.
Still don’t believe me? –Nancy K. Napier, Psychology Today.