How well do you know yourself? For instance, are you the type of person who's easily distracted? Or, are you so good at concentrating that you can tune out all the distractions around you?
Take this test to find out. Look at the two blocks of five rows and six columns of Q's. Can you find the O in each block? Take the test now.
So, did you find the O's? Or, were you distracted by the cartoon character on the right?
Your answer will put you, and everyone else, on the spectrum for being distractible, according to a professor at the University College London. She says that includes attention deficit hyperactivity disorder (ADHD) on the far end of that spectrum.
If you spotted the two O's pretty fast, you have good concentration, according to UCL professor Nilli Lavie. However, if you were distracted by the cartoon character to the right, you're easily distracted.
The professor says there is a link between a high level of distractibility and ADHD. In her test, like the one below, the professor had 174 people take the test a few times, some with distracting cartoon characters popping up.
The people who took the test also provided information about their childhood, to gauge for symptoms of ADHD. "Distractibility is a trait that is present already in childhood and predisposes people to attention lapses during adulthood," according to the professor. The results of her test were published in the medical journal Psychological Science.
Note: This UCL brain teaser is just for fun. If you're concerned about a family member's ability to concentrate, contact a medical professional.