Paying For IQ Points - The Dish | By Andrew Sullivan - The Daily Beast - 0 views
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"IQ tests are measuring much more than just raw intelligence--they also measure how badly subjects want to succeed both on the test and later in life":
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the team found that higher motivation accounted for a significant amount of the differences in IQ scores and also in how well IQ predicted later success in life. For example, differences in motivation levels accounted for up to 84% of the differences between the boys in how many years of school they had completed or whether they had been able to find a job.
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for the left, it reveals how individual motivation, i.e. effort, is actually a core part of an individual's success. It's not random.