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Children with an IQ above 140 by that test were included in the study. There were 643 children in the main study group. When the students who could be contacted again (503 students) were retested at high school age, they were found to have dropped 9 IQ points on average in Stanford–Binet IQ.
An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. [1] Originally, IQ was a score obtained by dividing a person's mental age score, obtained by administering an intelligence test, by the person's chronological age, both expressed in terms of years and months.
[11] [12] Even a small increase in average IQ would represent significant representation of outliers. [11] One psychologist, commenting on the state of research, says "it is fair to say that most, though not all, studies give Ashkenazi descendants a higher IQ than non-Jewish whites", but argues that the effect size remains contentious and ...
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Christopher Michael Langan (born March 25, 1952) is an American horse rancher and former bar bouncer, known for scoring highly on an IQ test that gained him entry to a high IQ society, and for being formerly listed in the Guinness Book of Records high IQ section under the pseudonym of Eric Hart, alongside Marilyn vos Savant and Keith Raniere ...
In Australia, the IQ of 6–12-year-olds (as measured by colored progressive matrices) has shown no increase from 1975 to 2003. [62] In the United Kingdom, a study by Flynn (2009) himself found that tests carried out in 1980 and again in 2008 show that the IQ score of an average 14-year-old dropped by more than two points over the period.
A Daily News analysis of vaccination data and IQ averages in each state reveals new patterns among anti- and pro-vaxxers, with five of the 10 states with the lowest IQs landing among the 10 states ...
However, the overall population maintains the same average intelligence: moving a person of moderate intelligence out of a high-intelligence group and into a low-intelligence group increases the mean intelligence of both the low- and the high-intelligence groups, while the overall population mean (which is a weighted average of the two groups ...
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