The results of a new study conducted Proceedings of the National Academy of Sciences in Norway showed that the additional time in the classroom can increase IQ by nearly 4 points.
"The extra time at school has a considerable effect on the increase in IQ in early adulthood. But the results are not yet clear whether this applies to all children, or just the children who are involved in this study. A link between higher IQ with education higher has been established, "the researchers said as quoted by BBCNewsHealth, Wednesday (28/12/2011).
But, in fact to determine whether to spend more time in school can actually increase the IQ is very difficult. This is probably because children with higher IQ are naturally choose to spend more time in the education system.
Intelligence quotient (IQ) is a score derived from one of several standardized tests designed to assess intelligence. IQ scores have been shown to be associated with factors such as morbidity and mortality, parental social status, a substantial rate, and parental IQ.
While the heritability of IQ has been researched for almost a century, controversy regarding the importance of heritability estimates, and the mechanism of inheritance is still a matter of debate.
IQ scores are used in many contexts, namely as a predictor of educational achievement or special needs. The average IQ scores for many populations have been increasing at an average rate of 3 points per decade since the early 20th century. It is a phenomenon called the Flynn effect.
Researchers from Statistics Norway, which publishes the official government data and the University of Oslo to take advantage of a natural experiment in the Norwegian educational system and its effect on the 107,223 students.
Between the years 1955-1972 in Norwegian local governments increase the compulsory 7-9 years. This means that students leave school at 16 years instead of 14 years. The effect of extra time at school is measured at the age of 19 years, while giving all people who qualify for the preparation of an IQ test.
"Enormous increase in the average education and average IQ clearly occurred at the same time when education reform was introduced. The extra time in school can increase the IQ of 3.7 points. The study takes advantage of extra time at school due to school reform comprehensive. This study could reveal a significant statistical effect and a significant portion of high school education on the value of IQ in early adulthood for men of Norway, "the researchers said.
The statisticians have been careful to draw conclusions, because they recognize that the effect may only apply to Norwegians or the educational system at that time. However, they argue that this additional study time at school may be able to increase intelligence in adolescence.
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