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The Bell Curve: Intelligence and Class Structure in American Life is a 1994 book by the psychologist Richard J. Herrnstein and the political scientist Charles Murray in which the authors argue that human intelligence is substantially influenced by both inherited and environmental factors and that it is a better predictor of many personal outcomes, including financial income, job performance ...
The Board of Scientific Affairs (BSA) of the APA had concluded that after the publication of The Bell Curve (1994) and the following debate that there were "serious misunderstandings" and "that there was urgent need for an authoritative report on these issues—one that all sides could use as a basis for discussion". Furthermore, "Another ...
In the bottom-right graph, smoothed profiles of the previous graphs are rescaled, superimposed and compared with a normal distribution (black curve). Main article: Central limit theorem The central limit theorem states that under certain (fairly common) conditions, the sum of many random variables will have an approximately normal distribution.
Genetics plays a bigger role than environment in creating IQ differences among individuals ... The bell curve for whites is centred roughly around IQ 100; the bell curve for American blacks roughly around 85 ... black 17-year olds perform, on the average, more like white 13-year olds in reading, math and science, with Hispanics in between.
The Gaussian function is the archetypal example of a bell shaped function. A bell-shaped function or simply 'bell curve' is a mathematical function having a characteristic "bell"-shaped curve. These functions are typically continuous or smooth, asymptotically approach zero for large negative/positive x, and have a single, unimodal maximum at ...
The term was coined by Richard Herrnstein and Charles Murray in their 1994 book The Bell Curve. [13] [14] [15] Flynn stated that, if asked, he would have named the effect after Read D. Tuddenham [16] who "was the first to present convincing evidence of massive gains on mental tests using a nationwide sample" [17] in a 1948 article. [18]
In another controversial leadership move, sources indicate Yahoo's CEO, Marissa Mayer has implemented a bell curve performance rating system to identify and fire low-performing employees. How it ...
"The bell curve for whites is centered roughly around IQ 100; the bell curve for American blacks roughly around 85; and those for different subgroups of Hispanics roughly midway between those for whites and blacks. The evidence is less definitive for exactly where above IQ 100 the bell curves for Jews and Asians are centered".