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Winter et al. (2024) when comparing two WAIS-5 validity studies found a reduced Flynn effect of an increase of 1.2 IQ points per decade rather than the expected 3 IQ point increase per decade. The authors identified various novel factors including social media dependency and the COVID-19 pandemic which may have contributed to a reduced Flynn ...
The 1981 article "Average IQ values in various European countries" by Vinko Buj is the only international IQ study that over a short time period has compared IQs using the same IQ test. Rindermann (2007) states that it is of dubious quality with scant information regarding how it was done.
The Flynn effect is the increase in average intelligence test scores by about 0.3% annually, resulting in the average person today scoring 15 points higher in IQ compared to the generation 50 years ago. [61]
The IQ figures are based on 3 different studies for 17 nations, two studies for 30 nations, and one study for 34 nations. There were actual tests for IQ in the case of 81 countries out of the 185 countries studied. For 104 nations there were no IQ studies at all and IQ was estimated based on the average IQ of surrounding nations. [2]
A high IQ at age 11 was predictive of increased alcohol dependency later in life and a one standard deviation increase in IQ scores (15-points) was associated with a higher risk of illegal drug use. [ 53 ]
In 1923, in his book A study of American intelligence, Carl Brigham wrote that on the basis of the Yerkes army tests: "The decline in intelligence is due to two factors, the change in races migrating to this country, and to the additional factor of sending lower and lower representatives of each race." He concluded that: "The steps that should ...
The post 35 People with Higher IQs Than Einstein appeared first on Reader's Digest. These geniuses reportedly have IQs even higher than Einstein's estimated 160. Learn the creative ways they've ...
Human intelligence can be measured according to an extensive number of tests and criteria, ranging from academic, social, and emotional fields. While there is no clear consensus on a definition of human intelligence, there are common themes among those that exist, summarized generally as "Intelligence measures an agent’s ability to achieve goals in a wide range of environments". [14]