According to the theory of domination left brain or right brain, each side of the brain controls a wide variety of different ideas. In addition, the theory suggests that a person will be more dominant using one part of the brain than the others. For example, someone who "left-brained" are often said to be more logical, analytical and objective, while the "berotak right" is said to be more intuitive, wise and subjective.
In the science of psychology, this theory is based on what is known as the lateralisasi brain function. The theory of the brain left brain and right starting from the works of Roger w. Sperry, who was awarded the Nobel Prize in 1981. While studying the effects of epilepsy, Sperry discovered that by cutting the corpus collosum (the structure that connects the two hemispheres of the brain) will be able to reduce or eliminate seizures.
However, these patients also experience other symptoms after the lines of communication between the two sides of the brain is cut off. For example, many patients who do brain separation does not mention the name of objects that can be processed by the right side of the brain, but are able to mention the name of the object that is processed by the left side of the brain. Based on this information, Sperry said that language is controlled by the left side of the brain.
Later research has shown that the brain hardly dikotomis as once predicted. For example, recent research has shown that ability in subjects like mathematics is actually more powerful when both parts of the brain work together.