Navigation Links
Shedding light on southpaws
Date:4/25/2012

Lefties have always been a bit of a puzzle. Representing only 10 percent of the general human population, left-handers have been viewed with suspicion and persecuted across history. The word "sinister" even derives from "left or left-hand."

Two Northwestern University researchers now report that a high degree of cooperation, not something odd or sinister, plays a key role in the rarity of left-handedness. They developed a mathematical model that shows the low percentage of lefties is a result of the balance between cooperation and competition in human evolution.

Professor Daniel M. Abrams and his graduate student Mark J. Panaggio -- both right-handers -- are the first to use real-world data (from competitive sports) to test and confirm the hypothesis that social behavior is related to population-level handedness.

The results are published today (April 25) in The Journal of the Royal Society Interface.

"The more social the animal -- where cooperation is highly valued -- the more the general population will trend toward one side," said Abrams, an assistant professor of engineering sciences and applied mathematics at the McCormick School of Engineering and Applied Science. "The most important factor for an efficient society is a high degree of cooperation. In humans, this has resulted in a right-handed majority."

If societies were entirely cooperative everyone would be same-handed, Abrams said. But if competition were more important, one could expect the population to be 50-50. The new model can predict accurately the percentage of left-handers in a group -- humans, parrots, baseball players, golfers -- based on the degrees of cooperation and competition in the social interaction.

The model helps to explain our right-handed world now and historically: the 90-10 right-handed to left-handed ratio has remained the same for more than 5,000 years. It also explains the dominance of left-handed athletes in
'/>"/>

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Shedding light on why it is so tough to make healthier hot dogs
2. Private weight-loss surgery clinics shedding quality patient care
3. U.S. Gives Green Light to Publish Controversial Bird Flu Research
4. Scientific session and new research highlights
5. Presidential keynote address and new research highlights from the American Society of Pediatric Otolaryngology meeting
6. Pesticides May Be Linked to Slightly Smaller Babies, Shorter Pregnancies
7. NIH researchers highlight progress, path forward for developing TB vaccines
8. Lightheadedness Upon Standing Could Signal Heart Risk
9. The twilight zone of traffic costs lives at stoplight intersections
10. Watching Movie Stars Light Up May Spur Kids to Smoke
11. Wake Forest Baptist research sheds light on cancer of the appendix
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/20/2014)... September 20, 2014 iFitDress.com, the popular ... for women, has recently unveiled its new collection of ... sale for special offer on these new outfits; it ... season. All customers can now buy cheap cocktail ... company’s sales representative says, “We have extensive experience in ...
(Date:9/20/2014)... The excitement is building up once again for the annual Mayberry ... the Surry Arts Council will be celebrating its 25th year hosting ... still fans of the Andy Griffith Show. , ... from 1960 through 1968. The show ranked by TV Guide ... Airy, North Carolina is where the show was filmed calling it ...
(Date:9/20/2014)... PA (PRWEB) September 20, 2014 "As a ... in their tanks," said an inventor from Tamaqua, Pa. "The ... mounted on the backs of their chairs. My invention enables ... developed the Kam Oxygen Sensor to make it easier to ... that the user knows when the tank is low. It ...
(Date:9/20/2014)... September 20, 2014 Plumbing construction ... out of 5, indicating a moderately favorable purchasing environment ... score reflects current and future pricing trends that will ... prices. Other factors that negatively affect buyer power are ... construction and the moderate switching costs. Buyers benefit, however, ...
(Date:9/20/2014)... QueenBeeTickets.com is ready to offer discount Ariana Grande ... visit many cities in North America next year from ... , Click Here to view the inventory ... The star’s fans are not going to want to ... in a live performance. Ariana Grande concert tickets are ...
Breaking Medicine News(10 mins):Health News:Fashionable Cocktail Dresses Unveiled Online at iFitDress.com 2Health News:Mayberry Days Parade Cars will be Provided by Mount Airy Toyota and Mount Airy Chrysler Dodge Jeep Ram 2Health News:Plumbing Construction Services Procurement Category Market Research Report from IBISWorld Has Been Updated 2Health News:Plumbing Construction Services Procurement Category Market Research Report from IBISWorld Has Been Updated 3Health News:Plumbing Construction Services Procurement Category Market Research Report from IBISWorld Has Been Updated 4Health News:Discount Ariana Grande Tickets: QueenBeeTickets.com Delights Fans with Discount Concert Tickets for Ariana Grande’s 2015 Honeymoon Tour 2
... 4 Nu Skin Enterprises, Inc. (NYSE: NUS ... quarterly dividend of $0.115 per share, which will be paid ... 15, 2009. , , The Company , ... its tradition of innovation through its comprehensive anti-aging product portfolio, ...
... planned benefit changes , , PORTLAND, Ore., June 4 ... perfect storm of rising health care costs and the declining ... three years of predictable rate adjustments and planned benefit changes, ... economic uncertainties. , , In these trying ...
... DIEGO, June 4 NuVasive, Inc. (Nasdaq: NUVA ... minimally disruptive surgical treatments for the spine, announced today that ... to present at the 8th Annual Needham Life Sciences Conference ... York, on Thursday, June 11, 2009, at 11:00 a.m. Eastern ...
... violent relationship may lead to poor mental health, ... --Adults who witnessed parental violence while growing up ... according to researchers who studied 3,023 adults in ... current depression, as well as their experiences with ...
... - , , - Total Net Sales in Line with Previous ... Today at 3:30 pm Central Time - , ... a medical device company that develops, manufactures and markets innovative proprietary products ... and full year ended March 31, 2009. Net sales of $2.9 ...
... is proud to announce the four finalists for its ... a competition to find Minnesota,s most innovative and effective ... cash awards as part of the Engaged Philanthropy Conference ... Graves 601 Hotel in Minneapolis. The Social Entrepreneur,s Cup ...
Cached Medicine News:Health News:Regence Rate Assure(SM) Offers Employer Groups Guaranteed Rates, Benefits 2Health News:NuVasive to Present at the 8th Annual Needham Life Sciences Conference 2Health News:NuVasive to Present at the 8th Annual Needham Life Sciences Conference 3Health News:When Parents Fight, Children Often End Up With Scars 2Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 2Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 3Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 4Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 5Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 6Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 7Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 8Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 9Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 10Health News:Uroplasty Reports Fourth Quarter and Full Year Fiscal 2009 Results 11Health News:Social Entrepreneur's Cup Finalists Announced 2Health News:Social Entrepreneur's Cup Finalists Announced 3Health News:Social Entrepreneur's Cup Finalists Announced 4Health News:Social Entrepreneur's Cup Finalists Announced 5
(Date:9/19/2014)... , September 19, 2014 ... by Equipment (Cryotherapy, Heat, therapy, Hydrotherapy), Accessories (Posture Mirror, ... (Hospitals), Advanced technologies - Global Forecast to 2019" ... poised to reach $19,786.3 Million by 2019 from ... 6.8% from 2014 to 2019. Browse ...
(Date:9/19/2014)...  4WEB Medical announces the formal launch of the ... implants on the market today at this weekend,s ... Chicago .  The Osteotomy Truss System is ... with 74 size options included in one versatile set. ... 15 to 18 implant sizes, which limited a surgeon,s ...
(Date:9/19/2014)... STATION, N.J. , Sept. 19, 2014 Merck (NYSE: ... United States and Canada , is ... Desafiando La Diabetes: Logra Tus Metas , an educational program ... their blood sugar -- a key treatment goal to help reduce ... United States are at a higher risk for developing ...
Breaking Medicine Technology:Physiotherapy Equipment Market Worth $19,786.3 Million by 2019 2Physiotherapy Equipment Market Worth $19,786.3 Million by 2019 3Physiotherapy Equipment Market Worth $19,786.3 Million by 2019 44WEB Medical Unveils 3D-Printed Osteotomy Truss System 2Celebrity Chef Leticia Moreinos Schwartz Partners with Merck on Desafiando La Diabetes: Logra Tus Metas to Urge Hispanics With Type 2 Diabetes to Get to Their A1C Goal 2Celebrity Chef Leticia Moreinos Schwartz Partners with Merck on Desafiando La Diabetes: Logra Tus Metas to Urge Hispanics With Type 2 Diabetes to Get to Their A1C Goal 3Celebrity Chef Leticia Moreinos Schwartz Partners with Merck on Desafiando La Diabetes: Logra Tus Metas to Urge Hispanics With Type 2 Diabetes to Get to Their A1C Goal 4Celebrity Chef Leticia Moreinos Schwartz Partners with Merck on Desafiando La Diabetes: Logra Tus Metas to Urge Hispanics With Type 2 Diabetes to Get to Their A1C Goal 5
... Aug. 13 Mylan Inc. (Nasdaq: www.mylan.com . ... This press release includes statements that constitute "forward-looking statements." ... provisions of the Private Securities Litigation Reform Act of ... actual future results may differ materially from those expressed ...
... VIEW, Calif. , Aug. 6 Alexza Pharmaceuticals, Inc. (Nasdaq: ... Chief Financial Officer, August J. Moretti will present during the Bank ... on Friday, August 13, 2010 at 10:40 am ET . ... York . , , , ...
Cached Medicine Technology:Alexza Pharmaceuticals to Present at Bank of America Merrill Lynch 2010 Specialty Pharmaceuticals Conference 2Alexza Pharmaceuticals to Present at Bank of America Merrill Lynch 2010 Specialty Pharmaceuticals Conference 3
Blood sedimentation rate analysis...
... CA-7000 provides speed and precision in ... with Sysmex technology. With its ... of up to 300 samples or ... testing. This high performance, fully ...
... is our top-of-the-line device. The ... of the Qwik-Let® Elite, in ... feature. The Lan-X technology allows ... in the removal and disposal ...
... variable volume Finnpipette Techpette combines ... high performance pipette. Advanced pipetting ... range, ensures quality, safety, comfort ... the volume range is an ...
Medicine Products: