Quick, hold up your left hand! If you hesitated, you’re probably part of the 25-percent who have what neuroscientists call left-right confusion. 

Dr. Eric Chudler is a neuroscientist at the University of Washington. And he says women are more likely to report experiencing left-right confusion than men. And a study in the journal Brain and Cognition shows that even among people with good spatial awareness, women had more trouble telling left from right. 

Also, there’s no link between left-right confusion and IQ. And it affects lefties and righties equally. But there seems to be an ear connection. Scientists have found that people whose hearing is biased toward one ear are more likely to experience left-right confusion. 

If you want to see how your ability to tell left from right stacks up against the rest of the world, The University of Washington has a test on its website. Go to www.faculty.washington.edu.