Your brain on multitasking

Voor één keer zet ik hier een Engelstalig bericht neer. Over mindfulness

If you're a programmer, you know that context-switching in a multi-threaded system isn't 100% free. There's overhead with tiny bits of time lost on each switch, as a new thread takes control. Well, it's the same way with your brain. Only a lot slower. And it doesn't look like
Brain 2.0, Now... with Multi-Processor Capability!
will be coming anytime soon.

And although there have been plenty of studies to show otherwise, the belief that multitasking will let us get more done continues. Think of how many times you've been on the phone with someone when you hear that little click-clack of their keyboard. (I hate that. I do it to other people, but I hate it when they do it to me.) And it makes me crazy when I'm trying to have a conversation with someone in the same room, while they're saying, "Uh-huh... yeah... I'm listening...sure, I can do this and talk at the same time...". You know who you are ; )

Our brains can't do even two independent things that require conscious thought, especially if those two things involve different goals. But that's OK, you might think, since multi-threaded systems on a single-processor aren't technically doing two things at the same time.. they're simply switching back and forth so quickly that they just appear to be processing simultaneously. But that's the problem... the brain isn't a computer, and in many cases the brain works much more slowly than a modern processor.

With each context switch, say, from the phone conversation to the email, there's a hit. And it's not a subtle hit. One of the things I really like about stress-management expert Jon Kabat-Zinn is that he sometimes offers seminars and workshops on time-management, but when you get there, it turns out his approach isn't about how you manage your file folders, but about mindfulness. Practicing mindfulness is like adding more hours to your day. If you're mindful, time slows down. You get more done, enjoy things more, and feel less stress. These are big claims, but anyone who's practiced mindful meditation or, like me, mindfulness-hold-the-meditation-thanks, will swear it's true.

So if you're stressed for time, do everything you can to resist the seemingly-intuitive notion that doing several things at once will save time. I know how hard it is to let that go, but study after study proves this wrong (here's another article from CIO magazine). Obviously there are exceptions, especially if you're quite content to let the quality of the work go down, or to be rude to the person you're talking to.

But imagine what it would be like if every time your co-worker, friend, spouse, lover, child wanted to say something to you and you turned and gave that person all your attention. End of story. No television sucking you into the event horizon. No glancing at the computer. No talking on the phone or checking your watch or reading a report... just 100% mindful, totally there, perfect eye contact, YOU. If you already do this now, that's awesome. If not, then if you try it--and I mean really try it--your family might think something's wrong with you. (One of those, "Who are you and what have you done with my husband?" moments.)

One tip: the brain finds it almost impossible to not turn to look at a television that's on (more on that in another post). So turn it off. If you must have television, make it a destination event. Something you do consciously like choosing to go to the theater. One of the worst things you can do to your brain (and family) is just have the TV on when you're doing virtually anything else but sitting down to watch a specific show. In other words, have a damn good reason for turning it on, and I swear you'll get more done (and have more energy... remember, television acts as somewhat of a temporary sedative to your brain. It literally sucks your energy, while simultaneously making you feel like it's helping you to relax. There's a great issue of Scientific American special edition on the Mind (volumne 14, number 1) that goes into a lot of technical detail about this).

If you want to get more done, be mindful.
If you want to have more time, be mindful.
Mindful means one thing at a time.
It's how the brain works, no matter how you try to convince yourself you can do it (although there is evidence that fast media/video-gamer kids are a little faster at switching. Not because they have a younger brain, but because their brains were more wired for this pace at a younger age).

As the Buddha might have said, when you're answering email, don't try to talk to someone at the same time. Be the emailing. ; )

Posted by Kathy on March 9, 2005 | Permalink