The page you linked to doesn’t exactly present evidence of a strong genetic component (or much of a consensus for that matter).
Could you elaborate? For example, the estimate from the largest study in the page (3,826 pairs) seems pretty nontrivial: 39% of variance! That’s not small or trivial by any means—that’s getting up there with some twin estimates of intelligence. And especially since the shared-environment estimate is 0.
Could you elaborate? For example, the estimate from the largest study in the page (3,826 pairs) seems pretty nontrivial: 39% of variance! That’s not small or trivial by any means—that’s getting up there with some twin estimates of intelligence. And especially since the shared-environment estimate is 0.