Try the thumb test to see which side of your brain is dominant!

First interlock your hands without giving it any thought. Now look and see whether you have placed the left thumb over the right thumb or vice versa.

All of us work in both modes, but everyone naturally tends towards one or the other.

People who place their right thumb on top of their left thumb tend to be left-brain dominant, and are thus more verbal and analytical. Those placing their left thumb on top of their right thumbs tend to be a right-brain dominant, and thus excel in visual, spatial and intuitive tasks.