What does IQ really measure?

That's the subject of my latest online story for ScienceNOW.

Please click the link to read, but here is the first paragraph:

Kids who score higher on IQ tests will, on average, go on to do better in conventional measures of success in life: academic achievement, economic success, even greater health, and longevity. Is that because they are more intelligent? Not necessarily. New research concludes that IQ scores are partly a measure of how motivated a child is to do well on the test. And harnessing that motivation might be as important to later success as so-called native intelligence.

Credit: Psychology Today

PS--Due to a technical glitch comments on this blog have not been posting. That should now be fixed.