Why introspective ability is different for everyone?

Not all of us are able to weigh the pros and cons of our every decision in an accurate manner. The introspective ability of a person plays a key role in helping people make choices. Nevertheless, this attribute may not be present in equal amounts in all the individuals and the people who have deficient proportions of this ability usually suffer with schizophrenia. The amount of gray matter present in the prefrontal region of brain is directly proportional to the level of introspective ability. This asset helps people in making more accurate decisions.