Bias based on handedness is bias or design, conscious or not, usually against people who are left-handed. Part of this is due to design in the world which is often right-hand biased. Handwriting is one of the biggest sources of actual disadvantage for left-handed people, other than for those forced to work with certain machinery. Approximately one-tenth of the world's population is left-handed, yet many common articles are designed for efficient use by right-handed people, and may be inconvenient, painful, or even dangerous for left-handed people to use. These may include school desks, kitchen implements, and tools ranging from simple scissors to hazardous machinery such as power saws.
Beyond such neglect, however, left-handed people have been subjected to deliberate discrimination and discouragement. In certain societies, they may be considered unlucky or even malicious by the right-handed majority. Many languages still contain references to left-handedness to convey awkwardness, dishonesty, stupidity, or other undesirable qualities. Even in relatively advanced societies, left-handed people were historically (and in some cases still are) forced as children to use their right hands for tasks which they would naturally perform with the left, such as eating and writing.
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Favorable perceptions
Among Incas left-handers were called (and now are called among the indigenous peoples of the Andes) lloq'e (Quechua: lluq'i) which has positive value. Peoples of the Andes consider left-handers to possess special spiritual abilities, including magic and healing.
The Third Sapa Inca--Lloque Yupanqui--was left-handed. His name, when translated from Quechua, means "the glorified lefthander."
In the Chinese language, the character for "left", ?, depicts a left hand attending to its work. In contrast, the character for "right", ? (yòu), depicts a right hand in relation to the mouth, suggesting the act of eating.
In tantra Buddhism, the left hand represents wisdom.
In early Roman times, the left side retained a positive connotation, as the Augures proceeded from the eastern side. The negative meaning was subsequently borrowed into Latin from Greek, and ever since in all Roman languages.
In Russian, "levsha" (lefty, lefthander) became a common noun for skilled craftsman, after the title character from "The Tale of Cross-eyed Lefty from Tula and the Steel Flea" written in 1881 by Nikolai Leskov.
In the context of BDSM and Leather culture, the left side is traditionally associated with dominance. Flagging on the left indicated one was the performer of an action rather than the recipient, and in The Story of O (an early piece of BDSM erotica) masters wore a symbolic ring on the left hand to show who they were.
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Unfavorable perceptions
The unfavorable associations and connotations of the use of the left hand among cultures are varied. In some areas, in order to preserve cleanliness where sanitation was an issue, the right hand, as the dominant hand of most individuals, was used for eating, handling food, and social interactions. The left hand would then be used for personal hygiene, specifically after urination and defecation. These rules were imposed on all, no matter their dominant hand. Through these practices, the left hand became known as the "unclean" hand. Currently, amongst Muslims and in some societies including Nepal and India it is still customary to use the left hand for cleaning oneself with water after defecating. The right hand is commonly known in contradistinction from the left, as the hand used for eating.
In many religions, including Christianity, the right hand of God is the favored hand. For example, Jesus sits at God's right side. God's left hand, however, is the hand of judgement. The Archangel Gabriel is sometimes called "God's left hand", sits at God's left side, and is one of six angels of death. Those who fall from favor with God are sent to left, as described in Matthew 25: 32-33, in which sheep represent the righteous and goats represent the fallen: "And he shall separate them one from another, as a shepherd divideth his sheep from the goats. And he shall set the sheep on his right, but the goats on his left." In 19th-century Europe, homosexuals were referred to as "left-handed". In Protestant-majority parts of the United Kingdom, Catholics were called "left-footers", and vice versa in Catholic-majority parts of Ireland and Irish America. Black magic is sometimes referred to as the "left-hand path", which is strongly associated with Satanism.
Various innocuous activities and experiences become rude or even signs of bad luck when the left hand becomes involved. In some parts of Scotland, it is considered bad luck to meet a left-handed person at the start of a journey. In Ghana, pointing, gesturing, giving or receiving items with the left hand is considered taboo or rude. A person giving directions will put their left hand behind them and even physically strain to point with their right hand if necessary. In some Asian countries, holding eating utensils in the left hand is considered impolite.
Forced use of the right hand
Due to cultural and social pressures, many left-handed children were encouraged or forced to write and perform other activities with their right hands. This conversion can cause multiple problems in the developing left-handed child, including learning disorders, dyslexia, stuttering and other speech disorders. Shifts from left- to right-handed are more likely to be successful than right to left, though neither have a high success rate to begin with. Successful shifters are more likely to become ambihanded than unsuccessful ones. Conversions can be successful with consistent daily practice in a variety of manual activities, but though activity in the non-dominant left-hemisphere of the brain will increase during tasks, so too will activity in the dominant right-hemisphere. Consistent left-handers have no higher activity in these task centers than converted left-handers, so it may be inferred that "attempts to switch handedness by educational training far from weakening the functional expression of lefthandedness in higher-order motor areas of the (dominant) right hemisphere in fact enhance it."
Many Asian countries encourage or force their children to become right-handed due to cultural perceptions of bad luck associated with the left hand. In India and Indonesia, it is considered rude to eat with the left hand. In a 2007 study in Taiwan, 59.3% of children studied had been forced to convert from left-handedness to right-handedness. The study took into account economic status of the children's families and found that children whose parents had less education were more likely to be forced to convert. Even among children whose parents had higher levels of education, the conversion rate was 45.7%. Among naturally left-handed Japanese senior high school students, only 0.7% and 1.7% of individuals used their left hand for writing and eating, respectively, though young Japanese are more likely to convert to using chopsticks right-handed than forks or spoons (29.3% to 4.6%). The proportion of females subjected to forced conversion is significantly higher compared to males (95.1% to 81.0%).
Western countries have also attempted to convert left-handed children due to cultural, social and religious biases. Schools tend to urge children to use their right hands, sometimes against the wishes of the child's parents. In America some students have been physically punished for writing with their left hands (though nowadays left-handedness is more widely accepted): "I was educated in the USA in Catholic school in the 60s. My left hand was beaten until it was swollen, so I would use my right right [sic] hand" ... "I had a teacher who would smack my left hand with a yardstick every time she caught me writing with my left hand" ... "My fourth grade teacher [...] would force me to use my right hand to perform all of my school work. If she caught me using my left hand, I was hit in the head with a dictionary. It turned out that she believed left handers were connected with Satan."
Malawians cite their views that "the left hand is less skilled and less powerful than the right one" as main reasons for forcing left-handers to convert. Among students, teachers and parents, 75% said the left hand should not be used to perform habitual activities, and 87.6% of these believed left-handers should be forced to switch dominant hands. Parents and close relatives are most responsible for impressing these beliefs upon their children.
Equipment
Because the vast majority of the world population is right-handed, most everyday items are mass-produced for ease of use with the right hand. Tools, game equipment, musical instruments and other items must be specially ordered for left-handed use, if they are even produced and are usually more expensive than their right-handed counterparts.
Household items
Right-handed tools can be difficult, uncomfortable, or dangerous for left-handed people to use.
Scissors
For example, (right-handed) scissors are arranged so that, in the right hand, fingers and thumb push the blades together laterally, creating the shearing action essential to scissors' utility. In the left hand, however, fingers and thumb tend to force right-handed blades apart, so that, rather than being sheared, the work-material is merely hacked, as by a knife, or slips between the blades uncut. Left-handers using right-handed scissors will often try to compensate by forcing the handles apart laterally, causing discomfort or injury to the first knuckle of the thumb.
In addition, a right-handed person using right-handed scissors can easily see the cutting line, but for a left-handed user the upper blade obscures the view.
Many scissors are offered as "ambidextrous" or "suitable for right- or left-handed use." Typically, these are merely right-handed scissors with modified handles to permit use in the left hand with less discomfort, but because the blades are still arranged for right-handed use, they will not perform well in the left hand.
Computer input devices
Input devices for computers can present obstacles to left-handed operation if intended for right handed use. Some computer set-ups have the mouse placed on the right side of the keyboard and unable to be repositioned to the left. The mouse itself is also sometimes shaped to fit the right hand better. The functions of mouse buttons, even on mice shaped to fit both hands, default to right-hand use. On two-button mice, the left button --under the index finger of a right-handed person-- is the primary button, while the right button performs secondary functions. The on-screen pointers themselves are also configured for right-handed people. Most desktop operating systems allow a user to reverse the functionality of mouse buttons to accommodate left-handed use, but left-handed cursors sometimes need to be specially downloaded. Trackballs and trackpads are often shaped for right-handed use. Even with the ability to change the functionality of buttons, these devices may be difficult for left-handed use. For a left handed person there are computer mice designed for left handed use, but they are a much smaller segment of the marketplace.
Knives
While European-style kitchen knives are usually symmetrical, Japanese kitchen knives have the cutting edge ground asymmetrically, having the cutting edge closer to the user's body with ratios ranging from 70-30 for the average chef's knife, to 90-10 for professional sushi chef knives; left-handed models are rare, and usually must be specially ordered or custom made. On the other hand, the majority of "flat ground" general-purpose knives typically have the cutting edge on the right, as with a left-handed knife, for aesthetic reasons rather than practical.
Cameras
One of the few cameras ever produced for left-handers was the half-frame Yashica Samurai. Cameras predominantly have the hand grip, shutter release, film wind lever and commonly used selection buttons, switches and dials controlled by the right hand. Lens controls (where present) tend to be accessible by either hand. When an unskilled left-handed person uses a right-handed camera the hand control can be less steady and hence produce camera shake leading to poorer pictures at low shutter speeds.
Musical instruments
Left-handed adaptations have even bridged the world of music. Left-handed string instruments, including guitars and members of the violin family, are manufactured as an alternative to using a flipped around right-handed string instrument, although significant resistance to left-handed string playing remains in classical music culture - one is more likely to see a left-handed violin played by a fiddler, whereas left-handed classical violinists will learn to play as right-handers. There have even been inverted pianos where the lowest notes correspond to the rightmost keys instead of the leftmost. Inverted trumpets are made, too. Although the trumpet's valves are normally designed to be operated with the right hand, the prevailing belief is that left-handed trumpeters are not at a significant disadvantage. The French horn, for example, is played with the left hand, yet most horn players are right-handed. Left handed drummers also set up drum kits the exact opposite to conventional right-handed setup (i.e. hi-hat on the right, bass pedal under left foot, ride cymbal to the drummer's left, etc.).
Sports
A left-handed individual may be known as a southpaw, particularly in a sports context. It is widely accepted that the term originated in the United States, in the game of baseball. Ballparks are often designed so that batters are facing east, so that the afternoon or evening sun does not shine in their eyes. This means that left-handed pitchers are throwing with their south-side arm. The Oxford English Dictionary lists a non-baseball citation for "south paw", meaning a punch with the left hand, as early as 1848, just three years after the first organized baseball game, with the note "(orig. U.S., in Baseball)." A left-handed advantage in sports can be significant and even decisive, but this advantage usually results from a left-handed competitor's unshared familiarity with opposite-handed opponents. Baseball is an exception since batters, pitchers, and fielders in certain scenarios are physically advantaged or disadvantaged by their handedness.
In baseball, due to the direction in which curveballs and sliders break, it is generally accepted that the pitcher has an advantage when his handedness is the same as the batter's, and the batter has an advantage when they are opposite. For this reason, many baseball teams include a left-handed specialist pitcher, who is brought into the game specifically to pitch to dangerous left-handed batters in crucial situations. A left-handed first baseman uses a more fluid motion to tag out a baserunner returning to first base during a pickoff attempt by the pitcher and has less difficulty avoiding baserunners while presenting their mitt as a target for other fielders to throw to. It is very uncommon to see a left-handed player playing any infield position other than pitcher or first basemen due to the counterclockwise flow of the game when throwing the ball around the bases. A fielder's handedness is either a physical advantage or hindrance for similar reasons throughout the infield positions, and left-handedness is not always the more desirable dexterousness.
Left-handed bowlers are usually at an advantage during ten-pin bowling competition when hooking the ball into the pins from the left side of the lane. As there are fewer left-handed players, the lane's left side is not used as much, and thus the applied oil pattern does not change as quickly as it does for right-handed bowlers.
In boxing, someone who boxes left-handed is frequently referred to as southpaw. The term is also used to refer to a stance in which the boxer places the right foot in front of the left, so it is possible for a right-handed boxer to box with a southpaw stance. Most boxers, southpaw or otherwise, tend to train with sparring partners who adopt an orthodox stance which gives southpaws an advantage. Manny Pacquiao is an example of a southpaw (although he writes with his right hand). In the popular boxing film series Rocky, the main character Rocky Balboa is a southpaw. Southpaw is also a term in professional wrestling, often giving them the advantage.
Fencing weapons feature left- and right-handed grips, and a left-handed fencer's stance is opposite that of a right-handed opponent. Though commonly asserted that left-handed fencers have an advantage over right-handed opponents because the line of defence favors their sword arm, this assertion describes both fencers in a mixed-handed duel, so neither competitor has a unique physical advantage. Thus the left-hander's advantage in fencing stems mostly from a right-hander's unfamiliarity with a left-handed stance.
The game of golf is most commonly played right-handed, and left-handed players typically must provide their own special golf clubs. The game can be played with both hands, provided the player has both left- and right-handed clubs, giving an advantage over one-handed players. Professional golfer Phil Mickelson plays left-handed though he is naturally right-handed.
In tennis, southpaws hold the racket in their left hand. Because of this, their grip of the handle is supposedly adjusted in a slightly different style from right-handed players. Some world champion left-handed tennis players include Jimmy Connors, Guillermo Vilas, John McEnroe, Martina Navratilova, Marcelo Ríos, Goran Ivani?evi? and Rafael Nadal.
Weapons
The vast majority of firearms are designed for right-handed shooters, with the operating handle, magazine release, or safety mechanisms set up for manipulation by the right hand, and fired cartridge cases ejected to the right. Also, scopes and sights may be mounted in such a way as to require the shooter to place the rifle against the right shoulder. A left-handed shooter must either purchase a left-handed or ambidextrous firearm (which are manufactured in smaller numbers and are generally more expensive and/or harder to obtain), shoot a right-handed gun left-handed (which presents certain difficulties, such as the controls being improperly located for the left hand or hot shell cases being ejected towards the shooter's body, especially the eyes or down the collar or right sleeve), or learn to shoot right-handed (which may be less comfortable or "natural"). A related issue is ocular dominance, due to which left-handed people may wish to shoot right-handed, and vice versa.
Some modern firearms are ambidextrous (e.g. the FN P90 and Heckler & Koch P7), or can be converted between right- and left-handed operation (e.g. the Heckler & Koch G36 and Steyr AUG). Bullpup rifles are particularly problematic for left-handers unless they can be reconfigured, since empty shells would be ejected straight into the shooter's face and cheek potentially causing injury, or otherwise designed from the ground up for ambidextrous use, often by way of complex ejection systems as seen on the FN F2000 and the Kel-Tec RFB. The British L85 Assault Rifle must be fired right-handed, placing left-handed soldiers at a disadvantage. In contrast, the Steyr AUG is of a modular design and the ejection port and extractor can be switched/replaced to suit the handedness of the soldier operating it. The M-16 and its variants have a fixed ejection port, but being a conventional (i.e. not bullpup) design the ejection port is forward of the operator and hence able to be fired either-handed. Circa 1985, with the introduction of the M16A2 version, a case deflector was incorporated adjacent to the ejector port to direct discarded shells in a more forward direction, making the rifle even more left hand operator friendly. The deflector is not always effective, however, as the ejected shell still stands a chance of hitting the left-handed shooter's cheek, especially in windy conditions.
Lever action and pump action firearms present fewer difficulties for left-handers than bolt action weapons do. Many weapons with adjustable sights allow for left-handed use, but for a right eye dominant shooter it is necessary to adjust. In fact, most weapons adjust well enough that a weapon will not eject shells into a left-hander's eye.
Machinery
Power tools, machinery and other potentially dangerous equipment is typically manufactured with the right-handed user in mind. Common problems faced by left-handed operators include the inability to keep materials steady, and difficulty reaching the on/off switch, especially in emergency situations. Table saws, whose blades protrude from the top of a table and pose the risk of losing fingers or hands, have their cutting area on the right side. This makes it difficult for a left-handed operator to guide the material being cut, as it must be pushed to the right side to align with the fence to avoid kickback. On bandsaws, the blade teeth are on the left side of the blade, necessitating the material being cut to be pushed from the left side of the machine. However, at this angle, the casing of the machine containing the rest of the blade is on the operator's left side, making it extremely difficult to guide the wood with their left hand. This can be countered by using a blade with teeth on both sides.
Handheld circular saws are made almost exclusively for right-handers, with the motor and grip on the right side. If held in the left hand, it is impossible for the operator to see what they are cutting. Tool manufacturer Porter-Cable produces a left-handed circular saw that can be purchased relatively inexpensively.
![Beginner here] Left handed attempt at blackletter with a 1.5mm ...](https://i0.wp.com/imgstore.ga/wp-contents/uploads/2010/6/CLPcvZ.jpg "Beginner here] Left handed attempt at blackletter with a 1.5mm ...")
Language
Historically, the left side, and subsequently left-handedness, was considered negative. The word "left" itself derives from the Anglo-Saxon word lyft, "weak". In Ancient Greek both words meaning "left" were euphemisms: the word ?????????, aristerós (the standard word in Modern Greek as well) is derived from ???????, áristos, "best", and the word ????????, eu?nymos, "of good name", is another euphemism used in lieu of "ill-named". The Latin adjective sinister/sinistra/sinistrum originally meant "left" but took on meanings of "evil" or "unlucky" by the Classical Latin era, and this double meaning survives in European derivatives of Latin, and in the English word "sinister". Alternatively, sinister comes from the Latin word sinus meaning "pocket": a traditional Roman toga had only one pocket, located on the left side. The right hand has historically been associated with skill: the Latin word for right-handed is dexter, as in "dexterity", meaning manual skill. Even the word "ambidexterity" reflects the bias. Its intended meaning is "skillful on both sides". However, since it keeps the Latin root dexter, which means "right", it ends up conveying the idea of being "right-handed on both sides". This bias is also apparent in the lesser-known antonym "ambisinistrous", which means "left-handed [i.e., clumsy] on both sides". In more technical contexts, "sinistral" may be used in place of "left-handed" and "sinistrality" in place of "left-handedness". In both Ancient Greek and Roman religion, auspices (usually the flight paths of birds, as observed by a bird-diviner, or augur) were thought to be unfavorable if appearing on the diviner's left-hand side and favorable if on the right: an ancient custom mentioned in Homer's Iliad and of apparently Middle Eastern origin (as attested in the Amarna correspondence, in which a king of Alashiya, i.e. Cyprus, requests an eagle-diviner from the Pharaoh of Egypt).
Meanings gradually developed from use of these terms in the ancient languages. In many modern European languages, including English, the word for the direction "right" also means "correct" or "proper", and also stands for authority and justice.
In Sanskrit, the word "???" (waama) stands for both "left" and "wicked."
In most Slavic languages the root prav (right) is used in words carrying meanings of correctness or justice. In colloquial Russian the word ????? (levy?) "left" means unofficial, counterfeit, strange. In Polish, the word prawo means "right" as well as "law", prawy means: lawful; the word lewy means "left" (opposite of right), and colloquially "illegal" (opposite of legal).
In French, droit(e) (cognate to English direct) means both "right" and "straight", as well as "law" and the legal sense of "right", while gauche means "left" and is also a synonym of maladroit, literally "not right", meaning "clumsy". Spanish, Italian, Portuguese and German have similar constructs. The Spanish term diestro and the Italian term destro mean both "right-handed" and "skillful". The contemporary Italian word sinistra has both meanings of sinister and left (the masculine adjective for sinister being sinistro), and maldestro means "clumsy". The Spanish siniestra has both, too, although the "left" meaning is less common and is usually expressed by izquierda, a Basque word that made its way into Portuguese as well. In some Spanish-speaking countries, to do something por izquierda means to engage in corrupt conduct or employ illegitimate means, whereas por derecha or a derechas means to do it the right (legitimate) way. Also, in Spanish, to tell someone "Eres tan zurdo" means that they are being clumsy, though the literal meaning is "You're so lefty." In Portuguese, the most common word for left-handed person, canhoto, was once used to identify the devil, and canhestro, a related word, means "clumsy".
In Romanian drept/dreapt? (coming from Latin directus) means both "right" and "straight". The word for "left" is stâng/stâng? coming from Latin stancus (= stanticus) meaning "tired".
In German, recht means "right" in both the adjectival sense (correct) and the nominal (legal entitlement). The word for "left" is links, and is closely related to both link (underhand, questionable), and linkisch (clumsy).
The Dutch words for "left" (links, linker) and "right" (recht, rechts, rechter) have much the same meanings and connotations as in English. The adjective link means "cunning, shifty" or "risky". A linkerd is a "crafty devil". To look at someone over the left shoulder (iemand over de linkerschouder aanzien) is to regard him or her as insignificant.
In Irish, deas means "right side" and "nice". Ciotóg is the left hand and is related to ciotach meaning "awkward"; ciotógach (kyut-OH-goch) is the term for left-handed. In Welsh, the word chwith means "left", but can also mean "strange", "awkward", or "wrong". The Scots term for left-handedness is corrie fistit. The term can be used to convey clumsiness.
In Finnish, the word oikea means both "right" (okay, correct) and "right" (the opposite of left).
In Swedish, att göra något med vänsterhanden (literally "to do something with your left hand") means "to do something badly". In Swedish, vänster means "left". The term vänsterprassel means "infidelity", "adultery" and "cheating". From this term the verb vänstra (lit. "lefting") is derived.
In Hungarian, the word for right is jobb, which also means "better". The word for left is bal, which also means "bad". In Estonian, the word pahem stands for both "left" and "worse" and the word parem stands for both "right" and "better".
In Turkish, the word for right is sa?, which means "alive". The word for left is sol, which means "discolor", "die", "ill".
In Chinese culture, the adjective "left" (Chinese character: ?, Mandarin: zu?) sometimes means "improper" or "out of accord". For instance, the phrase "left path" (??, zu?dào) stands for unorthodox or immoral means.
In Korean, the word for right is oreun (??), to be compared to the word meaning morally proper, orheun (??) which shares the same pronunciation.
In Hebrew, as well as in other ancient Semitic and Mesopotamian languages, the term "left" was a symbol of power or custody. There were also examples of left-handed assassins in the Old Testament, (Ehud killing the Moabite king.) The left hand symbolized the power to shame society, and was used as a metaphor for misfortune, natural evil, or punishment from the gods. This metaphor survived ancient culture and was integrated into mainstream Christianity by early Catholic theologians, such as Ambrose of Milan, to modern Protestant theologians, such as Karl Barth, to attribute natural evil to God in explaining God's omnipotence over the universe.
Expressions and colloquialisms
The left side is often associated with awkwardness and clumsiness. The Spanish expression "tener dos pies izquierdos", in English, the expression "to have two left feet", refers to clumsiness in the domains of football or dancing. A "left-handed compliment" is considered one that is unflattering or dismissive in meaning. The Polish expression "mie? dwie lewe r?ce", Dutch "twee linkerhanden hebben", German "zwei linke Hände haben", the Bulgarian expression "dve levi ratse", French "avoir deux mains gauches", Hungarian kétbalkezes and Czech "Mít ob? ruce levé" all mean "to have two left hands"--that one is clumsy or is a very poor handyman; the English equivalent is "to be all thumbs". Moreover, the German idiom "mit dem linken Fuß aufgestanden sein", the Spanish expression "levantarse con el pie izquierdo", the French expression "s'être levé du pied gauche" and the Hungarian expression "bal lábbal kelt fel" (literally, to get up with the left foot) mean to have a bad day and do everything wrong or unsuccessfully, related to the English expression "to get up on the wrong side of the bed". The Welsh phrase "tu chwith allan" (left side out) refers to an object being inside-out. In Russian, the use of the term nalyevo means "on the left", but can also connote taking bribes or "sneaky" behavior. Balszerencse (lit. "left luck") is Hungarian for "bad luck".
There are many colloquial terms used to refer to a left-handed person, e.g. "southpaw" (USA). Some are just slang or jargon words, while other references may be offensive or demeaning, either in context or in origin. In some parts of the English-speaking world, "cack-handed" is slang for left-handed, and is also used to mean clumsy. The origin of this term is disputed, but some suggest it is derived from the Latin cacare, in reference to the habit of performing ablutions with the left hand, leaving the right hand "clean". However, other sources suggest that it is derived from the Old Norse word keikr, meaning "bent backwards". Australians frequently use "cacky-handed". A less common Australian slang word for a left-handed individual is the term Molly-Dooker, whose origins cannot be determined with certainty.
Handwriting
Left-handed people who speak Arabic, Persian, Urdu, Hebrew or any other right-to-left script do not have the same difficulties with writing. The right-to-left nature of these languages prevents left-handers from running their hand on the ink as happens with left-to-right languages. Because writing when moving one's hand away from its side of the body can cause smudging if the outward side of the hand is allowed to drag across the writing, it is considered easier to write the Latin alphabet with the right hand than with the left. Furthermore, it is considered more difficult to write legible Chinese characters with the left hand than it is to write Latin letters, though difficulty is subjective and depends on the person in question.
Left-to-right alphabets can be written smudge-free and in proper "forward slant" with the left hand if the paper is turned 1/4 turn clockwise (90 degrees to the right), and the left hand is drawn toward the body on forward strokes, and left to right on upward strokes (as expressed in directionality of the text). It is also possible to do calligraphy in this posture with the left hand, but using right-handed pen nibs. Otherwise, left-handed pen nibs are required in order to get the thick-to-thin stroke shapes correct for most type faces, and the left-handed calligrapher is very likely to smudge the text. Left-handed pen nibs are not generally easy to find, and strokes may have to be done backwards from traditional right-handed calligraphic work rules to avoid nib jamming and splatter. Left-handed people have an advantage in learning 19th-century copperplate hands, which control line-width by pressure on the point.
Civic life
Schooling
As the majority of students in public schools are right-handed, most commonly used implements are designed for the right-handed, from pencil sharpeners to scissors to desks. The consequences to left-handed students can vary from decreased academic performance or physical ailments to nothing at all.
In many classrooms and lecture halls, desks are designed so that the writing surface is attached to the chair instead of separate from it. In this design, the desk is attached on the right side, offering an armrest for right-handed people to use while writing. In some of these desks, the writing surface does not extend fully to the left, necessitating a left-handed user to turn their body in order to write properly, sometimes causing back, neck and shoulder problems. This contorted posture may also cause the student to be accused of cheating. In some cases, however, large lecture halls will use left-handed desks on the left-most column of each section so that left-handed people can comfortably write without bumping against a neighbor.
This right-handed bias is reflected in standardized tests as well. Multiple-choice tests tend to put the question on the left side of the page and the answers on the right side. If the answers must be filled in in a separate booklet, it can be awkward and uncomfortable for a left-handed student to line up the booklet with the answers. The time it takes to find a comfortable, convenient position cuts into test-taking time, resulting in rushed answers and unchecked work.
In Vietnam, schools officially require students to write with their right hands, and some teachers of Grade 1 (when writing is taught) would implement that rule by deducting points from tests written by the left hand. The Civic Education textbook for grade 7 mentions a student thanking her old teacher for helping her write with her right hand, and stopping her from using her left hand to write.
Employment
In research done on the relations of handedness and employment, researchers may start their experiments believing left-handers earn lower wages than their right-handed counterparts, due to effects like difficulty using right-handed tools and increased rate of illness among left-handed people. However, their findings are more complex. In studies in the United States and United Kingdom, it was found that left-handed men earn more than right handed-men; about 5% more in the UK. Conversely, left-handed women earn about 7.5% less than right-handed women.
Source of the article : Wikipedia
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