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3. Scientists have proposed several explanations for the Flynn effect. Some suggest that the improved test scores simply reflect an increased exposure to tests in general. Because we take so many tests, we leam test-taking techniques that help us perform better. Others have pointed to better nutrition, which results in babies being bom larger, healthier, and with more brain development than in the past. Another possible explanation is a change in educational styles - children are encouraged to discover things for themselves rather than just memorizing information.This could prepare people to do some skills that intelligence tests require.
4. Flynn himself suggested that leaming new technologies may have improved people's problem-solving skills. This may be true for the first decade of his tests, when IQ scores in many countries increased. However, in recent years, IQ test scores in some countries have begun to decline. Data from Norway, the Netherlands, Australia, and Great Britain have shown that as these countries become more and more modem, IQ scores have begun to drop. This may result from the fact that people are relying too much on online sources of information, and not doing any thinking for themselves. So while the world may have gotten smarter over the 20th century, improving technology and changing lifestyles may soon reverse that trend.
* Heredity is the process by which features and characteristics are passed on to you from your
pare
vour genes.
