How can you determine which side of a person's brain is dominant?

The reasoning that the dominant side of the brain is determined by the side that controls a person's dominant hand is based on established neurological principles. The brain is divided into two hemispheres, with the left hemisphere typically responsible for motor functions on the right side of the body and the right hemisphere controlling the left side. For most right-handed individuals, the left hemisphere is dominant, as it governs fine motor skills required for tasks such as writing, which is often executed by the dominant hand.

This concept is supported by research indicating a strong correlation between hand dominance and hemispheric specialization. In practical terms, you can observe that right-handed individuals tend to exhibit left-brain dominance in areas related to language and analytical tasks, while left-handed individuals may have a more varied pattern of brain dominance.

In contrast, the size of the hemispheres, their response time to stimuli, or efficiency in information processing do not provide a definitive means to ascertain brain dominance in a straightforward manner. Brain dominance is more commonly assessed through handedness and the consequent neurologic organization rather than through these other attributes.