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I'm strongly 'one-handed' in that I can barely even write with my left hand. My wife is fairly ambidextrous, in that she's by default left-handed, but can also write with her right hand.

I've noticed that she's capable of driving in the dark with full, stressful concentration and still be able to talk. Whereas I'd have trouble driving in the dark and holding a conversation at the same time.

I've heard that this is because one handed people have developed a side of the brain more strongly than the other, whereas ambidextrous people have developed both. Anything that implies that ambidexterity is a disadvantage for multitasking would also be helpful.

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Where have you heard this? Did you look for additional information yourself prior to posting this? What did you find? What do you interpret to be a more 'developed' brain? – Steven Jeuris♦ Jan 29 at 10:43
Multitasking is about making multiple things that require attention at the same time. Being ambidextrous is about being able to write with both hands (and not being able to write with both hands at the same time). So I don't see any relation. As an example, I am not ambidextrous, but for some things I am left handed (writing, eating, tooth brushing...) and others right handed (sports, using mouse...). And that didn't help me at all to multitask: I can barely talk and drive in complex situations at the same time. – pinouchon Jan 30 at 10:11
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Here is some information on this apa.org/monitor/2009/01/brain.aspx – Caesar Jan 30 at 16:17
@StevenJeuris: Tried to look for some 'citeable' sources, but couldn't find a solid one yet. There's the common knowledge assumption that handedness is used to divide labor, but even Wikipedia doesn't cite this well (among humans). There's research that correlates handedness with brain development, but most are quite narrow in scope, like specific towards language or IQ. Made the assumption that if one dominant hand meant the opposite brain half was well developed, both dominant hands meant both sides were well developed. – Muz Jan 31 at 4:41
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Looks like that idea has been challenged: www.sciencedirect.com/science/article/pii/S0028393208000675 – Xurtio Jan 31 at 5:11
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