On the NNAT, often students "don't understand what they're supposed to do, " said David Lohman, a professor of educational psychology at the University of Iowa and the co-author of a rival test, called the CogAT.

WSJ: Big Change in Gifted and Talented Testing

But a new Kyowa-funded study of 60 healthy women found a monthlong regime of daily doses of citicoline resulted in improved attention and fewer errors on a cognitive test compared with placebo, says co-author Deborah Yurgelun-Todd, a scientist at the Brain Institute at University of Utah in Salt Lake City, who is a paid consultant to Kyowa.

WSJ: An Energy Shot for the Brain

Even the test author agreed it was a poor choice.

WSJ: Big Change in Gifted and Talented Testing

For example, an ebook that includes a self assessment or test or a way to ask a question of the author directly is a far more useful tool for the creation of more qualified leads as opposed to simply the mass number of individuals who downloaded the document.

FORBES: #2 You Must Build a Content Production Engine

Mr. Gilder is a founder of the Discovery Institute and author of "The Israel Test" (Richard Vigilante Books, 2009).

WSJ: George Gilder: Why Antagonize China?

Co-author Prof Frank Nestle said more work was needed on developing IgG4 as a potential test to improve patient care by helping to identify patients most likely to respond to treatments.

BBC: Skin cancer 'able to fight off body's immune system'

"I think we're close to the point where, instead of a dietitian saying, 'Eat less fat, eat more fruits and vegetables, ' they could figure out what foods you do or don't like with a survey or genetic test, " says John Hayes, a professor of food science at Penn State and lead author of a 2010 study showing supertasters' preference for salt.

WSJ: People Who Taste Too Much

Big John is John Grisham, the 45-year-old lawyer-turned-author who became publisher of the magazine in 1994 and used it to test the waters for his upcoming novel, A Painted House, which was serialized in the six issues of the Oxford American last year.

FORBES: Southern Discomfort