Are you left-handed? Have cats, or have taken recreational drugs? If so, you may be smarter than the average Joe. Smart people have many things in common, and a number of experiments have identified some of the behaviors and characteristics that are common among people with higher level of intelligence.
Have you ever wondered what geniuses have in common? A number of experiments have been conducted to find that out and some peculiar behaviors have been observed among people with high IQ.
There is no great genius without a mixture of madness. That wasn't only claimed by Aristotle but modern science today,says so too. A high correlation has been observed between creativity and mental illness. People with schizophrenia, mood disorders, anxiety disorders and autism, tend to be very creative.