From the mid to late 1800s to the early 1900s nature was the zeitgeist:
This was the season of Mendel and Darwinism. Francis Galton argued that intelligence, or lack of, ran in families. He introduced eugenics, which will be spoken about by Denise, to speed up the address of natural selection.
1920s 1930s
Intelligence tests were re-analyzed and validity questioned. There was a great deal of rachislash regarding the accessible consequences of eugenics. There were contradictions in evidence shifting the zeitgeist in favor of nurture. Evidence right off seemed to support a closer link between social class having and intelligence. Psychologists bean to do more than studies on the environmental factors.
1940s early 1990s
The Pendulum swings back to the middle. Social interventions were put into calculate with the idea that it was not the psyche that was the problem, but social determinants.
The pendulum swings back again to the nurture side of intelligence. In the 1960s with the rail of the Behaviorism the dominant school of thought, the tabula rasa or blank dry land was in the lead.
In 1994 Hernstein and Murray published a book coroneted The Bell Curve, provoking the nature vs. nurture tip over once again.
The works main thesis is that an individuals intelligence no less than 40% and no more than 80% of which is inherited genetically from his or her parents- has more effect than socioeconomic background on future flavor experiences. Manolakes (1997), p.235.
They studied the correlation between IQ and socioeconomic success, a prestigious job, high annual income and educational attainment and demonstrate a positive correlation. Their view was that you were already genetically predispose to a successful intent or a life of failure. They did not agree with any of the social interventions stating that they are a waste of time and money.
Interesting Statistics:
Same person tried twice 87%
Identical twins reared together 86%
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