There are numerous theories about the effects on the level of IQ that have been talked about in recent decades. While some have argued that this is something we are born with and that cannot be changed in any way, others think that the situation is quite the opposite and that life circumstances give the final picture of the human intellect.
The truth is, as usual, somewhere in between. Just as a child of high parents will most likely be tall – if he eats healthily and has an orderly life – so a child of parents with a high IQ will most likely have the opportunity to inherit that from his parents, unless an unusual circumstance occurs.
The IQ of a child adopted at birth, research has shown, is not correlated with the IQ of the parents who adopted him, but is correlated with the IQ of the biological parents – regardless of the conditions in which the child grew up, the education he received , and another.
We have learned a lot about genes that affect the level of intelligence in recent years. These are about 500 genes that, individually, do not have a significant effect on IQ height, but together give a decisive influence on the outcome. However, these 500 genes determine the frames, and the environment affects how much we will reach within those frames.
According to an analysis published in the journal New Scientist, there are several significant components: iodine deficiency has been found to be associated with lower IQ, followed by the presence of parasites, as well as the presence of lead in gasoline. Extreme family circumstances, such as neglect and abuse, have also been found to have a strong impact.
But now we are where we are, and what about the intelligence we have? How does it affect our lives?
The level of IQ, researchers claim, has a two-thirds impact on school test scores, while a crucial third is influenced by motivation, mental and physical health.
IQ determines how good we will be at doing the job, it determines social mobility as well as the ability to solve complex problems, regardless of whether we are engaged in highly intellectual professions or some “simple” craft. Research from the University of Edinburgh shows that the importance of IQ levels can be seen in everyday, routine activities, from coping in the supermarket to treating other people.
Recent studies also suggest that people with high IQs live healthier and longer lives. The reasons can be various, from the fact that more intelligent people are better educated, more successful, have higher incomes, access to better quality food, they are more informed about the importance of physical activity. Then, the reason for longevity may be that the ability to think and make good decisions helps them avoid accidents, chronic diseases, as well as to be disciplined in treatment.