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Is it true that left handed people have a shorter life expectancy than right handed people?
Yes..... Well that's what people and research say.
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Most people can only write with one hand. Those who are right-handed write with their right hand, and those who are left-handed write with their left hand. Those who can …write just as well with one hand as the other are called ambidextrous, but this is not that common. It is most common in older people who went to school in the good old days of the cane. Back then if someone was lefthanded they were often forced to perform all their work righthandedly and with their natural lefthandedness became ambidextrous. Since the right side of the brain controls the left side of the body, left-handed people have right side brain dominance, and right-handed people have left side brain dominance. Many left handed people perform other tasks right handed (kicking a ball or using scissors) so there is often no dominance. It does take a little practice but you can teach yourself to write with either hand.
No! It is just more common to be right handed. In order to be left handed it must come from both set of jeans( rare).
That is controlled by the brain, which can be conditioned. Early-stage Alzheimer's patients (in the US) are being taught to use the opposite of their dominant hand to inspire …the brain to use existing brain cells and generate fresh new brain cells.
The generally accepted figure seems to be 10% of the world's population. So as a ratio, that's 9 right handed people to 1 left handed person, or 9:1.
Right-handed on people, on average, do live longer than Left-handed people. The primary reason for this being accidents with tools, which are predominantly designed for the …right-handed, occurring more frequently with the left-hand dominant. This is especially true with power tools, or using tools in precarious positions, the top of a ladder being just one example.
Answer There is no difference in life expectancy between left and right handed people. There was a controversial study done in 1980 by Halpern & Coren that suggested le…ft-handed people had an average life expectancy of 9 years less than right-handed people. However, data was based on second-hand information: surveys from the next-of-kin of recently deceased persons asking about right/left handedness and age of death. They found left-handed average age of death was 66; right-handed average age was 75. Unfortunately, this study keeps getting quoted even though more recent data has shown their hypothesis is not supported. Second hand survey data is not a sound methodology. In addition, if a study reports a higher mortality rate (or any other "problem") in left-handers, then it's very important to look at the research design and how the data was analyzed. Simply checking the sample sizes will give a good indication of whether it was a "real" significant difference. If the sample sizes are large, and most studies have sample sizes of 1,000 or more, then there will be a "statistically" significant difference between groups (i.e.: Left versus Right) even if the amount of variance explained by the two groups is very small, which means there is no clinical significance. A statistical significant difference does not mean it has clinical or meaningful significance. Many statistical tests will give a significant difference only because of large sample sizes. Therefore, the measure of explained variance needs to be computed because it is unaffected by sample size. More recent studies have disputed the notion that left-handed people die earlier. For example, see the study by Aggleton, Bland, Kentridge, & Neave in the British Medical Journal at http://bmj.bmjjournals.com for more information. In addition, for a discussion of the Halpern & Coren study, see the link: http://bmj.bmjjournals.com/cgi/content/full/308/6925/408 (from http://www.drdaveanddee.com/left.html)
Well, if you are both handed, it means that you are ambidextrious. These people sometimes become ambidextrious by practicing constantly with the opposite hand. There are diffe…rent ways in which you are ambidextrious. For instance, i am ambidextrious in one way because i open stuff with both hands. Another way i am ambidextrious is because i can write with both hands. But i am more accurate with my right hand. Some people are different because they may be born left handed but some one else taught them that they're using the wrong hand. This happened to me. I was SUPPOSED to be left handed. Hope this helped you!
I'm not 100% sure about this, but I have been doing a report on asymmetries betweent the right and left hands and the differences in these asymmetries between right- and left-…handers, and from the information I have come across the 1 to 9 ratio seems to be pretty well accepted. (10% left-handed / 90% right-handed). Please correct me if you have more specific or up to date info. I believe ur right about that and of that 10%, 70% are males and 30% are females which means that 90% of the world is right-handed and 10% is left, 7% of the world is left-handed males and 3% is left-handed females. I believe you may be wrong because if 10% of people are left handed then 90% of people are right handed then how many people are ambidextrious? ^The amount of ambidextrous people is assumed to be negligible in this case.
It is just how they are born. Some people force them self or practice to use both hands to write. It's the way the brain is wired left handed people use the right side of the …brain while right handed people use left side of brain.
They do not. On average, right handed people live 9 years longer than them.
To be honest, I don't really think it makes any kind of difference. A study published in 1991 claimed that statistics indicate that left-handed people's lifespans are shorte…r than those of their right-handed counterparts by as much as 9 years. The authors suggested that this may be the result of left-handed people being more likely to die in accidents as a result of their "affliction", which renders them clumsier and ill-equipped to survive in a right-handed world. Many subsequent studies have shown no evidence that left-handed people have reduced longevity compared to right-handed people.
Yes studies show that on average left-handed people write significantly neater than those who use their right hand
There is no scientific evidence to suggest right handed people are smarter than left handed people. Some studies have indicated a small (and perhaps coincidental) correlatio…n between left-handedness and slightly increased creativity, but this has not been substantiated.
It just depends on what hand you choose to write with. You can be ambidextrous or even teach yourself how to write with your other hand.
because let handed people are stupid, and they don't know how to write with their right hand and most left handed people don't even have a brain..... GO SUPERMAN
it just depends if you r rite or left handed