2011 Refimprove date February 2007 Other uses Handedness , or chirality , is an attribute of humans ... may be the result of a debilitating physical condition. There are four main types of handedness Right handedness is most common. Right handed people are more dexterous with their right hand when ... than left handed or any other form of handedness. ref name sciamerican Cite web url http www.scientificamerican.com ... ref ref name Psych p 309 Psychology for A level second edition, page 309 ref Left handedness is less common than right handedness. Left handed people are more dexterous with their left hand when ... journal author Hardyck C, Petrinovich LF title Left handedness journal Psychol Bull volume 84 issue 3 pages 385 404 year 1977 pmid 859955 doi 10.1037 0033 2909.84.3.385 ref Cross dominance Mixed handedness ... efficiently with their right hand. However, many writers Who date April 2010 define handedness by the hand used for writing, so mixed handedness is often neglected. Ambidexterity is exceptionally ... proposed. Theories of handedness Expert subject Philosophy section date August 2007 The prevalence of right handedness is universal across human cultures, although the percentage of right handedness ... Previc, 1991 . Newer theories of handedness look at handedness in different ways than previously ... Proceedings of CHI 94 pages 417 423 doi 10.1145 191666.191808 ref The newer view is that handedness ... according to the relative frequency of each type in the population. handedness is inextricably ... advantage in combat. The rate of left handedness appears to correlate with the amount of violence .... However, this theory suffers from the fact that right handedness is universal, even among ... Division of labor is the most commonly accepted theory of handedness. Citation needed date May ... of the brain controls speaking, right handedness would prevail. It also predicts that left handed ... could well explain some left handedness, but it has too many gaps to explain all left handedness ... more details
Wiktionarypar handednessHandedness commonly refers to Handedness , a human attribute reflecting the unequal distribution of fine motor skill between the left and right hands. Handedness also may refer to Chirality , Greek for handedness , is also used to describe a number of similar concepts in other fields Edinburgh Handedness Inventory , a measurement scale used to assess the dominance of a person s right or left hand in everyday activities Handedness and sexual orientation , research attempting to link the two Handedness of Presidents of the United States , research attempting to characterize a causal connection between the fine motor skill and the elected office Mathematical handedness , a common synonym for orientation mathematics orientation or chirality mathematics See also Handed disambiguation Left handed disambiguation Right handed disambiguation disambig ... more details
Left handedness always occurs at a lower frequency than right handedness. Generally, left handedness is found within 8 of the overall population. However, left handedness is more likely to occur in twins than in single individuals. Left handedness in twins occurs at a higher frequency which is 17 . ref name Derom Derom, C., Thiery, E., Vlietinck, R., Loos, R., and Derom, R. 1996. Handedness in Twins ... left handedness is less than 4 . ref name Rife Rife, D.C., 1939. Handedness, with special reference ... twins with both individuals displaying left handedness is less than 4 . There is no difference in the handedness frequency between MZ and DZ twins. ref name Rife Rife, D.C., 1939. Handedness, with special ... twins are born in two different chorion sacs. The frequency of left handedness in MZDC twins is 22 . ref name Derom Derom, C., Thiery, E., Vlietinck, R., Loos, R., and Derom, R. 1996. Handedness in Twins ... of frequencies of left handedness in MZMC was 23 . There was no big difference in MZDC and MZMC twins. ref name Derom Derom, C., Thiery, E., Vlietinck, R., Loos, R., and Derom, R. 1996. Handedness .... ref Mirror imaging It is believed that this correlation between handedness in twins mirror imaging ... membrane. The zygosity and chorion type do not influence twins handedness. ref name Derom Derom, C., Thiery, E., Vlietinck, R., Loos, R., and Derom, R. 1996. Handedness in Twins According to Zygosity ... handedness in MZ twins demonstrated mirror imaging. Other factors of handedness Family history of left handedness ref name Rife Rife, D.C., 1939. Handedness, with special reference to twins ... of Position at Birth and Handedness. Pediatrics 29 307 309 ref Birth stress forces and injures ... of Position at Birth and Handedness. Pediatrics 29 307 309 ref Gestational age ref name Shimizy Shimizu, A., and Endo, M. 1983. Handedness and familial sinstrality in a Japanese student population. Cortex 19 265 272 ref ref name Ooki Ooki,S. 2006. Nongenetic Factors Associated with Human Handedness ... more details
Researchers have suggested a link between handedness and ability with mathematics . This link has been proposed by Norman Geschwind Geschwind , Galaburda, Annett, and Kilshaw. The suggested link is that a brain without extreme bias towards locating language in the left hemisphere would have an advantage in mathematical ability. ref name Bishop cite book title Handedness and Developmental Disorder author D. V. M. Bishop pages 158&ndash 159 publisher Cambridge University Press date 1990 isbn 9780521411950 ref Body of research Douglas study A 1967 study by Douglas, found no evidence to correlate mathematical ability with left handedness or ambidexterity . The study compared the people who came in the top 15 of a mathematics examination with those of moderate mathematical ability, and found that the two groups handedness preferences were similar. However, it did find that those who came lowest in the test had mixed hand preferences. A study in 1979 by Peterson found a trend towards low rates of left handedness in science students. ref name Bishop Jones and Bell study A 1980 study by Jones and Bell also obtained negative results. This study compared the handedness of a group of engineering students with strong mathematics skills against the handedness of a group of psychology students of varying mathematics skills . In both cases, the distribution of handedness resembled that of the general ... with several examples, including a handedness questionnaire given to undergraduates. Annett observes that studies that depend from voluntary returns of a handedness questionnaire are going to be biased towards left handedness, and notes that this was a weakness of the study. However ... 44 versus 24 , and that there was a similar but smaller left handedness difference for female undergraduates ..., for explaining the cause of handedness, of an absent genetic right shift factor. ref name Bishop ref name Annett cite book title Handedness and Brain Asymmetry author Marian Annett pages 227&ndash ... more details
The Edinburgh Handedness Inventory is a measurement scale used to assess the dominance of a person s right or left hand in everyday activities. The inventory can be used by an observer assessing the person, or by a person self reporting hand use. The latter method tends to be less reliable due to a person over attributing tasks to the dominant hand. The Edinburgh Handedness Inventory was published in 1971 by R.C. Oldfield ref Oldfield, R.C. 1971 . The assessment and analysis of handedness The Edinburgh inventory. Neuropsychologia, 9, 97 113 ref and has been used in various scientific studies ref cite web url http www.ncbi.nlm.nih.gov pubmed 9638746 title NIH web site accessdate 2009 04 08 ref ref cite web url http brain.oxfordjournals.org cgi content full 123 12 2512 title Oxford journal accessdate 2009 04 08 ref as well as popular literature. ref cite book title A left handed Turn Around the World author David Wolman isbn 9780306814983 date 2006 ref See also Laterality References reflist External links http www.brainmapping.org shared Edinburgh.php An online example of the tool authored by Mark Cohen , hosted at http www.brainmapping.org http www.brainmapping.org Category Motor skills Category Upper limb anatomy anatomy stub ... more details
A relationship between handedness and sexual orientation has been suggested but not verified by a number of researchers, who report that heterosexual individuals are somewhat more likely to be right handed than homosexual individuals. The relationship between handedness and sexual orientation has been reported within both sexes and may reflect the biological etiology of homosexuality recent work by Ray Blanchard has linked the relationship to the fraternal birth order effect , which suggests that a man with several older brothers is more likely to be homosexual. Studies Mustanski et al., 2002 study Mustanski et al. examined sexual orientation and hand preference in a sample of 382 men 205 heterosexual 177 homosexual and 354 women 149 heterosexual 205 homosexual . Although homosexual women were found to be significantly more non right handed than heterosexual women 18 vs 10 , no significant differences were found between heterosexual and homosexual men with respect to hand preference. ref Mustanski, B. S., Bailey, J. M., & Kaspar, S. 2002 . Dermatoglyphics, handedness, sex, and sexual orientation. Archives of Sexual Behavior, 31, 113 122. pmid 11910784 ref Lippa, 2003 study Lippa examined sexual orientation and handedness in a sample of 812 men 351 heterosexual 461 homosexual and 1189 women 707 heterosexual 472 homosexual . Homosexual men were 82 more likely to be non right handed than heterosexual men, but no significant differences were found between heterosexual and homosexual women in terms of handedness. When combining men and women into one large sample, homosexual individuals ... . Handedness, sexual orientation, and gender related personality traits in men and women. Archives ... of fraternal birth order and handedness in the development of male homosexuality. Hormones ... Blanchard discussed ways in which the fraternal birth order effect and handedness could be explained .... 2008. Review and theory of handedness, birth order, and homosexuality in men, Laterality. 13 1 , 51 ... more details
the handedness of presidents prior to the early 20th century. The first president to be described ... who has worked on handedness, says that left handed people have a wider scope of thinking , and points ... Handedness Category Motor skills ... more details
Esquerdinha young left one may refer to Glasner da Silva Albuquerque born 1980 Brazilian footballer Gilvan Gomes Vieira born 1984 Brazilian footballer Eduardo Souza Reis born 1984 Brazilian footballer See also Left handedness hndis it Esquerdinha pt Esquerdinha ... more details
int filedesc Information Description en A colony generated by the Chiral morphotype bacteria of P. dendritiformis . The colony diameter is 5cm and the colors indicate the bacteria density bright yellow for high density . Note that the branches have are curly with well defined handedness. Source own Date date 01 17 2011 Author Credit Prof. Eshel Ben Jacob Permission Cc by sa 3.0 http star.tau.ac.il eshel From Ben Jacob Lab other versions ... more details
Orphan date February 2009 Coin snatching , often nicknamed the Chinese elbow trick , consists of a simple Magic illusion trick in which coin s are placed on the elbow and the hand is placed on the shoulder and the hand swings forwards to catch the coin s . If done correctly, the trick will look like the coin s have Teleportation teleported with a bang. The current world record for coin snatching in accordance with British rules 10g coins or heavier, i.e. no US quarters, multiple stacks, you can drop as many as you like and still count what remains is 328 coins. ref http www.recordholders.org en records coin.html World Records for Coin Snatching ref Technique To start off, a coin, an elbow , a shoulder, and a hand are required preferably those of the conjurer, and of the same limb . Using the strongest hand right for Right handedness right handed people and left for left handedness left handed people one puts their hand on their shoulder and makes sure their arm is in a position in which the coin s won t slide off. Then, one swings their arm forwards and grabs the coin s . References reflist Magic stub Category Magic tricks Category Coin magic ... more details
This is a list of Left handedness left handed boxers . The list includes year and country of birth, as well as the major weight categories in which they competed. Markus Beyer 1971 Germany light super middleweight ref http boxrec.com list bouts.php?human id 007045&cat boxer Boxrec.com ref Jack Bodell 1940 UK light heavyweight heavyweight ref http boxrec.com list bouts.php?human id 18894&cat boxer Boxrec.com ref Lucian Bute 1980 Romania fights in Canada super middleweight ref http boxrec.com list bouts.php?human id 223046&cat boxer Boxrec.com ref Chris Cornelius Byrd 1970 USA light heavyweight heavyweight Bobby Pacquiao 1980 Philippines super featherweight Manny Pacquiao ref http boxrec.com list bouts.php?human id 006129&cat boxer Boxrec.com ref 1978 Philippines welterweight light welterweight References references Category Boxers Category Handedness ... more details
Left hand may refer to any of Left handedness , a term referring to a person who primarily uses their left hand to accomplish things Left Hand comics , a comic book character owned by Marvel Comics Left Hand Vampire Hunter D , a character from the Vampire Hunter D series of books, published in Japan Left Hand manga , a Japanese manga Left Hand, West Virginia , a community in the United States Left Hand Path and Right Hand Path describing the two different opposing belief systems disambig ... more details
A hair whorl is a patch of hair growing in the opposite direction of the rest of the hair. Hair whorls occur in most hairy animals, on the body as well as on the head. Hair whorls, also known as crowns, swirls, trichoglyphs, or cowlicks, can be either clockwise or counterclockwise in direction of growth. Hair whorls on the head parietal whorls have been studied by some behaviorists. Most people have clockwise scalp hair whorls. Parietal whorls which are considered to be normal scalp patterns could be a single whorl or double whorls. Cases of triple parietal whorls are less common but do not necessarily indicate abnormality. Citation needed date December 2008 Amar J. Klar conducted research to see if there was a genetic link between handedness and hair whorl direction. He found that 8.4 of right handed people and 45 of left handed people have counterclockwise hair whorls. His research indicates that a single gene may control both handedness and hair whorl direction. ref name KlarAJ Human handedness and scalp hair whorl direction develop from a common genetic mechanism. Klar AJ Genetics 2003 Sep 165 1 269 76 http www.genetics.org cgi reprint 165 1 269.pdf ref Animal behavioral theories main Hair whorl horse Image P1020066.jpg thumb right This horse is an example of two vertical whorls. There are many mostly apocryphal theories concerning horse behavior and their hair whorls. ref name Forsberg Forsberg Meyer, Jennifer. What s in a Whorl? Horse & Rider June 2008 46 53. ref One paper has suggested that abnormal hair whorls can be used as to assess the likelihood of agitated behavior or temperament in cattle in the auction ring. ref http www.grandin.com references hair.whorl.position.html A note on hair whorl position and cattle temperament in the auction ring Bot generated title ref References Reflist DEFAULTSORT Hair Whorl Category Developmental biology Category Neurology ja pl Dodatkowy wir w os w ... more details
Wiktionary Chirality handedness is a property of asymmetry important in several branches of science. It may refer to Chirality chemistry , a property of molecules having a non superimposable mirror image Chirality electromagnetism , an electromagnetic propagation in chiral media Chirality journal , an academic journal dealing with chiral chemistry Chirality manga , a manga series Chirality mathematics , the property of a figure not being identical to its mirror image Chirality physics , when a phenomenon is not identical to its mirror image Gastropod shell Chirality in gastropods References reflist disambig Category Chirality ca Quiralitat de Chiralit t es Quiralidad fa fr Chiralit it Chiralit nds Chiralit t pl Chiralno pt Quiralidade ru sr zh ... more details
wiktionary left Left may refer to Left direction Left Hope of the States album Left Hope of the States album , 2006 Left Sharlok Poems album Left wing politics , the political trend or ideology Left Austria , a movement of Marxist Leninist, Maoist and Trotskyist organisations in Austria left or left arrow may refer to Assignment computer science , for instance in the programming language APL See also Left handedness Copyleft Venstre disambiguation disambig ar da Venstre flertydig de Links el es Izquierda desambiguaci n eu Ezkerra argipena fr Gauche nl Links ja no Venstre andre betydninger ro St nga zh ... more details
wiktionary left and right Left and right may refer to Left and right as physical relative direction s in terms of an observer Left and right handedness as skills and habits of particular people Left right politics Left and Right A Journal of Libertarian Thought Left & Right album , a 1968 album by Rahsaan Roland Kirk Left & Right song , a 2000 song by D Angelo See also Left and right, roles of unities or identity element s in mathematics Note that these are in See also since they are not left or right or left and right as terms with a meaning of their own, but unnatural abstractions, probably individuals back formations, from the concept left and right unity ies de Links und rechts nl Links en rechts disambig ... more details
Summary Console screenshot of Deus Ex Human Revolution . Protagonist Adam Jensen is seen inside the Picus TV newsroom. He is shown Left handedness left handed , an unusual trait in videogame characters. As Jensen is looking down a sniper scope but the camera is third person and pointing elsewhere, this image is probably not one of actual gameplay. Non free use rationale Description Console screenshot of Deus Ex Human Revolution Source http forums.eidosgames.com showpost.php?p 1408123&postcount 1409 Article Deus Ex Human Revolution Portion No Low resolution No Purpose Product identification, illustration of art style Replaceability No free alternative exists other information This is a freely available screenshot released as a publicity image. The owner intends it to be distributed widely. Licensing Non free game screenshot ... more details
Unreferenced date July 2010 Cross tabulation is the process of creating a contingency table from the multivariate frequency distribution of statistics statistical variables. Heavily used in survey research, cross tabulations or crosstabs for short can be produced by a range of statistical packages, including some that are specialised for the task. Survey weights often need to be incorporated. Unweighted tables can be easily produced by some spreadsheet s and other business intelligence tools , where they are commonly known as pivot table s. Definition and example Definition A matrix display of the categories of two nominal scaled variables, containing frequency counts of number of subjects in each bivariate category is called cross tabulation table or contingency table. The following table lists the gender and the handedness for a sample population of 12 individuals class wikitable Sample no Gender Handedness 1 Female Right handed 2 Male Left handed 3 Male Right handed 4 Female Right handed 5 Female Right handed 6 Male Right handed 7 Male Left handed 8 Male Right handed 9 Female Right handed 10 Female Left handed 11 Male Right handed 12 Female Right handed Cross tabulation leads to the following contingency tables class wikitable Right handed Left handed Total Males 4 2 6 Females 5 1 6 Total 9 3 12 See also Contingency table Category Categorical data Category Data analysis statistics stub he pl Table krzy owe su Cross tab ... more details
unreferenced date August 2008 stack file Visszat kr z s prizm n 2.jpg thumb Total internal reflection in Porro prism file Porro prism.png thumb A single Porro prism file Double porro prism.png thumb A double Porro prism In optics , a Porro prism , named for its inventor Ignazio Porro , is a type of reflection prism optics prism used in optical instruments to alter the orientation of an image . It consists of a block of glass shaped as a right prism geometry geometric prism with right angled triangular end faces. In operation, light enters the large rectangular face of the prism, undergoes total internal reflection twice from the sloped faces, and exits again through the large rectangular face. Because the light exits and enters the glass only at normal incidence, the prism is not dispersion optics dispersive . An image travelling through a Porro prism is rotated by 180 and exits in the opposite direction offset from its entrance point. Since the image is reflected twice, the handedness of the image is unchanged. Porro prisms are most often used in pairs, forming a double Porro prism . A second prism, rotated 90 with respect to the first, is placed such that the beam will traverse both prisms. The net effect of the prism system is a beam parallel to but displaced from its original direction, with the image rotated 180 . As before, the handedness of the image is unchanged. Double Porro prism systems are used in small optical telescope s to re orient an inverted image an arrangement is known as a image erection system , and especially in many binoculars where they both erect the image and provide a longer, folded distance between the objective lenses and the eyepieces. Commonly, the two components of the double Porro system are cemented together, and the prisms may be truncated to save weight and size. A single Porro prism is a type of roof prism , though it is not used in this way in binoculars. A variation on the double Porro prism is the Porro Abbe prism . optics st ... more details
Unreferenced date December 2009 Image Abbe koenig prism.png right An Abbe Koenig prism thumb 380px In this image, the bottom left and right corners of the prism are not needed and have been cut off to reduce weight. An Abbe Koenig prism is a type of reflecting prism optics prism used to invert an image rotate it by 180 . They are commonly used in binoculars and some telescope s for this purpose. The prism is named after Ernst Abbe and Albert Koenig . The prism is made from two glass prisms which are optically cemented together to form a symmetric, shallow Vee shaped assembly. Light enters one face at normal incidence, is total internal reflection internally reflected from a 30 sloped face, and then is reflected from a roof German Dach section consisting of two faces meeting at a 90 angle at the bottom of the prism. The light is then reflected from the opposite 30 face and exits, again at normal incidence. The net effect of the internal reflections is to flip the image both vertically and horizontally. This produces a 180 image rotation without changing the image s handedness , and allows use of the prism as an image erecting system . Unlike the more common double Porro prism configuration, the Abbe Koenig prism does not displace the output beam from the input beam, making it advantageous in some instruments. The prism is also less bulky than the double Porro design. The prism is sometimes simply called a roof prism , although this is ambiguous because other roof prisms exist, such as the Amici roof prism Amici and Schmidt Pechan prism Schmidt Pechan designs. A variant of the Abbe Koenig prism replaces the roof section of the prism with a single mirror coated reflecting surface. This type of prism flips the image vertically, but not laterally, changing the handedness of the image to the opposite sense. DEFAULTSORT Abbe Koenig Prism Category Prisms ca Prisma d Abbe Koenig es Prisma de Abbe Koenig sl Abbe K nigova prizma zh ... more details
Wiktionarypar left handed TOCRight Left handed commonly refers to Left handedness , a person who primarily uses his or her left hand, more so than the right hand. Left handed also may refer to Popular culture List of musicians who play left handed Heavy, Left Handed and Candid , DVD release by Cradle of Filth The Left Handed Gun , a 1958 western film The Left Handed Hummingbird , original novel based on the long running British television series Doctor Who The Left Handed Man , a 1913 drama film Science Left handed material , metamaterial which has a negative refractive index Left handed particle, chirality physics is a particle whose spin and momentum lie in opposite directions. Sports List of left handed athletes Left handed specialist , a left handed baseball relief pitcher that focuses on a select group of batters Craig Anderson left handed pitcher Mike Bacsik left handed pitcher Scott Baker left handed pitcher Kevin Brown left handed pitcher Jos Capell n left handed pitcher Chris Carter left handed hitter Dolly Gray left handed pitcher Mike Jackson left handed pitcher Ken Johnson left handed pitcher Bobby Jones left handed pitcher Steve Kline left handed pitcher Bill Lee left handed pitcher Mark Lee left handed pitcher Dutch Leonard left handed pitcher Bill Miller left handed pitcher Jos N ez left handed pitcher Rich Robertson left handed pitcher Dick Scott left handed pitcher Al Smith left handed pitcher Scott Taylor left handed pitcher Matt Williams left handed pitcher See also Handedness disambiguation Right handed disambiguation disambig ... more details
Infobox baseball biography name Hiroyasu Tanaka image YS Hiroyasu Tanaka.jpg width 225 team Tokyo Yakult Swallows number 7 position Second baseman birthdate Birth date and age 1982 5 24 birthplace Kizugawa, Kyoto Kizugawa , Kyoto Prefecture Kyoto , Japan bats Right handedness Right throws Right handedness Right debutleague Nippon Professional Baseball NPB debutdate April 6 debutyear 2005 debutteam Tokyo Yakult Swallows Yakult Swallows statyear 2009 season statleague NPB stat1label stat1value stat2label stat2value stat3label stat3value teams nowiki nowiki Tokyo Yakult Swallows Yakult Swallows Tokyo Yakult Swallows npby 2005 update 23 July 2010 Hiroyasu Tanaka Japanese , born May 24 , 1982 in Kyoto, Japan is a Japanese people Japanese professional baseball er for the Tokyo Yakult Swallows . He was the number 1 draft pick for the Swallows in By 2005 . In By 2007 he was leader in triple baseball triple s for the Central League . References japanesebaseball id 1940 Tokyo Yakult Swallows roster Persondata Metadata see Wikipedia Persondata . NAME Tanaka, Hiroyasu ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH 1982 05 24 PLACE OF BIRTH Kizugawa, Kyoto Kizugawa , Kyoto Prefecture Kyoto , Japan DATE OF DEATH PLACE OF DEATH DEFAULTSORT Tanaka, Hiroyasu Category 1982 births Category Living people Category People from Kyoto Prefecture Category Japanese baseball players Category Yakult Swallows players Category Tokyo Yakult Swallows players japan baseball bio stub ko ja ... more details
Wiktionarypar right handed TOCRight Right handed commonly refers to Right handedness , a person who primarily uses his or her right hand, more so than the left hand. Right handed also may refer to Sports Mike Bacsik right handed pitcher Scott Baker right handed pitcher Frank Barnes right handed pitcher Bud Black right handed pitcher Kevin Brown right handed pitcher Jos Capell n right handed pitcher Chris Carter right handed hitter Mike Jackson right handed pitcher Ken Johnson right handed pitcher Bobby Jones right handed pitcher Steve Kline right handed pitcher Bill Lee right handed pitcher Mark Lee right handed pitcher Dutch Leonard right handed pitcher Matt Miller right handed pitcher Ralph Miller right handed pitcher Jos N ez right handed pitcher Rich Robertson right handed pitcher Dick Scott right handed pitcher Roy Smalley right handed hitter Bob Smith right handed pitcher born 1890 Bob Smith right handed pitcher born 1895 Mike Stanton right handed pitcher Scott Taylor right handed pitcher Matt Williams right handed pitcher See also Handedness disambiguation Left handed disambiguation disambig ... more details
toward right handedness are cumulative over time hence increasing with age for any given person ... 1971 . The assessment and analysis of handedness The Edinburgh inventory. Neuropsychologia 9 97 113 .... In many cases, this may be because they are disposed for left handedness but have been trained for right handedness. In the sport of cricket , some players may find that they are more comfortable ... to the interhemispheric transfer time. Thus, one in five persons has a handedness that is the opposite ... or the handedness of each person. A skater can jump and spin counter clockwise the most common ... Handedness Ocular dominance Situs inversus Laterality References reflist External links http pages.prodigy.net ... more details
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