Somewhere, people got the idea that girls were not as good at math as boys and that was a cultural issue - discrimination on one side or favoritism on the other - and it had to be fixed, usually with legislation and money for social activists.

Is there any truth to it?

After sifting through mountains of data, including SAT results and math scores from 7 million students who were tested in accordance with the No Child Left Behind Act, a team of scientists reporting in Science says the answer is 'no.' Whether they looked at average performance, the scores of the most gifted children or students' ability to solve complex math problems, girls measured up to boys.

"There just aren't gender differences anymore in math performance," says University of Wisconsin-Madison psychology professor Janet Hyde, the study's leader. "So parents and teachers need to revise their thoughts about this."

Were there ever differences? Or did No Child Left Behind close that gap? What will shift this long-held attitude? Hyde can't say, but she remains determined to state the facts.

"Stereotypes are very, very resistant to change," she says, "but as a scientist I have to challenge them with data."

Though girls take just as many advanced high school math courses today as boys, and women earn 48 percent of all mathematics bachelor's degrees, the stereotype persists that girls struggle with math, says Hyde. Not only do many parents and teachers believe this, but scholars also use it to explain the dearth of female mathematicians, engineers and physicists at the highest levels.

Cultural beliefs like this are "incredibly influential," she says, making it critical to question them. "Because if your mom or your teacher thinks you can't do math, that can have a big impact on your math self concept."

To carry out its query, the team acquired math scores from state exams now mandated annually under No Child Left Behind (NCLB), along with detailed statistics on test takers, including gender, grade level and ethnicity, in 10 states.

Using data from more than 7 million students, they then calculated the "effect size," a statistic that reports the degree of difference between girls' and boys' average math scores in standardized units.

The effect sizes they found - ranging from 0.01 and 0.06 - were basically zero, indicating that average scores of girls and boys were the same.

"Boys did a teeny bit better in some states, and girls did a teeny bit better in others," says Hyde. "But when you average them all, you essentially get no difference."

Some critics argue, however, that even when average performance is equal, gender discrepancies may still exist at the highest levels of mathematical ability. So the team searched for those, as well.

For example, they compared the variability in boys' and girls' math scores, the idea being that if more boys fell into the top scoring percentiles than girls, the variance in their scores would be greater.

Again, the effort uncovered little difference, as did a comparison of how well boys and girls did on questions requiring complex problem solving. What the researchers did find, though, was a disturbing lack of questions that tested this ability.

In fact, they found none whatsoever on the state assessments for NCLB, requiring them to turn to another data source for this part of the study.

What this suggests, says Hyde, is that if teachers are gearing instruction toward these assessments, the performance of both boys and girls in complex problem solving may drop in the future, leaving them ill-prepared for careers in math, science and engineering.

"This skill can be taught in the classroom," she says, "but we need to motivate teachers to do so by including those items on the tests."

The study's final piece was a review of the granddaddy of all high school math tests, the SAT. The fact that boys score better on it than girls has been widely publicized, contributing to the public's notion that boys truly are better at math. But Hyde and her co-authors think there's another explanation: sampling artifact.

For one thing, because it's administered only to college-bound seniors, the SAT is hardly a random sample of all students. What's more, greater numbers of girls take the test now than boys, because more girls are going to college.

"So you're dipping farther down into the distribution of female talent, which brings down the average score," says Hyde. "That may be the explanation for (the results), rather than girls aren't as good as math."

Citation: Janet S. Hyde, Sara M. Lindberg, Marcia C. Linn, Amy B. Ellis and Caroline C. Williams, 'Gender Similarities Characterize Math Performance', Science 25 July 2008: Vol. 321 no. 5888 pp. 494-495 DOI: 10.1126/science.1160364

Subscribe to the newsletter

[x]

Stay in touch with the scientific world!

### Know Science And Want To Write?

- The Number Of My Publications Has Four Digits
- Professor Frenkel: Why Shouldn't We Drop Algebra From Our Education System?
- Matter Can Potentially Accelerate The Expansion Of The Universe
- The Geology Of Wine
- Why Does Anyone Still Believe In The Loch Ness Monster?
- Metal Hip Replacements Implanted Since 2006 More Prone To Failure
- Unified Mathematical Field Theory Talk

- "Just to add a link, may update article later - to BBC news article about Hinksey power station..."
- "I have a fair amount of math and physics background, and I am sorry but this is not excellent...."
- "There are even papers considering possible dark energy fields that would couple to the standard..."
- "Dear Hank, the United Nations are just a silly NGO. They are not running my country and they are..."
- "He wasn't kicked out of academia, so you owe him an apology in that sense. With his sensational..."

- New data improve techniques for determining whether a jaw bone comes from a man or woman
- Salts in the brain control our sleep-wake cycle
- Prion-like protein found in plants
- Making precision medicine a reality: Genomics researchers find road map to disease origin
- Spintronics for future information technologies

Take a look at the best of Science 2.0 pages and web applications from around the Internet!

Who's

Online?

Online?

"This skill can be taught in the classroom," she says, "but we need to motivate teachers to do so by including those items on the tests."

HELLO, anyone home? Math teachers are BORN motivated to teach interesting things, but increasingly contend with the incessant mania for testing. There is nothing quite so DEmotivating as having educational policy determined by idiots who believe that the way to motivate behavior is through testing.