3 ms·

I meant as a species not an individual basis

• bildung 11y ago
  Intelligence is only defined for individuals. There is no objective meaning for "intelligence", it's all relative to other individuals. Intelligence tests are designed to produce points on a bell curve, they don't say anything about the form of the curve itself. IQ tests have the same problems as bell curve grading in school, you can't compare results between different cohorts :) But as it can be shown that the environment strongly influences IQ I'd say it is safe to assume that we as a species haven't yet approached the biological ceiling of our cognitive abilities. Once the environment doesn't influence IQ test results anymore, though...