Handedness and such
Oct. 21st, 2013 08:48 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
I was imagining some sort of series of tasks to be performed by left and by right hand, scored for accuracy and timed for speed, with some sort of statistical analysis to determine if you are more left or right handed. The sort of thing that in my mind I imagine sensible people running children through before starting to teach them to write, so you could start them with the better hand. Because how would you know unless you do some sort of careful test?
Anyway, I went looking and found the Edinburgh Handedness Inventory, which is just an amazingly pathetic inventory. Try this slightly expanded version. For one thing, it starts off with things obviously influenced by the do-this-right-handed world around you, like the overwhelming majority of scissors not really working left-handed. A handedness inventory that asks if you've gotten so fed up with trying to use right-handed scissors that you went and obtained special left-handed scissors isn't going to tell us anything we didn't already know. We don't need a test for the really obvious cases.
The other thing is, wow, those are some "handed" activities? Using a spoon? Opening a box? People actually do those consistently left or right handed? Brush or comb? Surely you tend to use the left hand for the left side of the head, right hand for the right side? Unlocking a door? Wouldn't that just depend on which side of the door the lock is on, and from with side you approach the door, and which hand you happen to have the key in when you get there? These seem to me like an entirely different order of tasks from handwriting, seemingly far below the threshold of caring which hand you use.
Eye dominance tests, those are also a mystery to me, setting me up to see a perfectly matched symmetrical pair of images and implying vaguely that I should be seeing something different. As far as I have seen, eye dominance tests are scored on a 100:0 or 0:100 or else "no dominant eye" basis, apparently no one has been interested in taking the time to develope a test carefully crafted enough to score you as a 48:52 or whatever.
I'm also left thinking there is some sort of metaphor for gender in this, that there are exactly two and everyone is obviously one or the other. (I'm starting to wonder if maybe there are some aspects to gender that are as mysterious to me as handedness. I suspect there may be.)
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Date: 2013-10-22 02:42 am (UTC)no subject
Date: 2013-10-22 04:47 am (UTC)no subject
Date: 2013-10-22 10:21 am (UTC)no subject
Date: 2013-10-23 12:42 am (UTC)I've never tried left-handed archery, for lack of a suitable bow. That'd be interesting. I'm rubbish shooting a rifle left-handed. (Though not much better right-handed, to be fair.)
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Date: 2013-10-23 01:23 am (UTC)The parallax of two eyes and objects at different distances produces a pair of images and apparently (I guess) some people's brains tend to process-out one of them (like not perceiving the blind spots, I guess), but some of us very clearly always perceive both and if one is more dominant than the other it's a very, very subtle thing. Something you could only really determine with many repetitions of a very carefully set up test to pick out some tiny bias toward left or right. In practice apparently no one has worked up such a careful test, and if it's not just obvious without needing a statistical analysis then it's just 'no dominant eye.'
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Date: 2013-10-23 02:30 am (UTC)no subject
Date: 2013-10-23 04:13 am (UTC)no subject
Date: 2013-10-23 09:44 am (UTC)However, these days I shoot a longbow, and many of those are two-sided - I remember one shoot I was at where a left-handed friend's bow broke, so he borrowed one from another right-handed friend, and they shot on alternate details with the same bow! (My longbow is actually a 'right-handed' one - it only has an arrow plate on the left side of the grip.)
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Date: 2013-10-24 01:09 am (UTC)no subject
Date: 2013-10-22 08:26 am (UTC)Lately, two doctors have told me I am probably a lefty trained to be right handed. I shrugged, because, well, I don't really feel there is anything I'd rather do with my left, as many true lefties do. They complain about scissors and can openers being the wrong way. I don't care. When building an IKEA closet, I use the screwdriver with my right hand for the corners I can best reach with my right, then switch to left for the others, and I don't mind either.
The test you linked to gives me 45, which is Middle but leaning towards right. Seems to be exactly how I feel about it. :)
There is only one thing I do almost exclusively with my left and that's holding and driving the computer mouse. I switched mouse sides during college when I had to type lots of numbers with the number block on my right and used the mouse to click on the next field. I've kept it there since, and I'm also doing photo editing and drawing with the lefty mouse.
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Date: 2013-10-22 10:19 am (UTC)I believe I'm left-footed, definitely right-eyed (certainly so for archery), but I'm an awkward sod when it comes to handbags, as they seem to be designed to be carried on the right side, and I want them on the left, so I always find the zips are the wrong way round to be convenient. I have odd shoulders, I know - I could never carry my satchel on my left shoulder, as it slipped off but found it awkward on the right. Yes, I wear handbags across my body mostly...
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Date: 2013-10-22 12:35 pm (UTC)There may be something specific about writing which is connected to handedness, and maybe that leads us to use the writing hand more for other skills even though we could learn with either.
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Date: 2013-10-23 06:55 pm (UTC)I thought for a while that I use my left hand to unscrew bottles, but that's not so. I do hold the cap with my left hand - and then turn the bottle with my right hand. Stupid, but that's how I do it.