>Focusing on the core 4-test g measure, we think that accounting for 1.6% of the variance of intelligence is exciting for several reasons. First, this effect size is greater than the effect sizes from previous GWA studies of the normal range of intelligence.45 The effect size of 1.6% represents >2.5% of the heritable variance of intelligence, which is comparable to the most robust effect sizes in behavioural research.46
That they are "excited" to account for at best 2.5% of high IQ through genetics suggests that genetics is not a large contributor to high intelligence.
Previous studies demonstrating high heritability of IQ did not discriminate between genetic inheritance and social/cultural/environmental inheritance. Clearly, the latter are more significant contributors than is genetics.
In the conclusions section they state:
>Focusing on the core 4-test g measure, we think that accounting for 1.6% of the variance of intelligence is exciting for several reasons. First, this effect size is greater than the effect sizes from previous GWA studies of the normal range of intelligence.45 The effect size of 1.6% represents >2.5% of the heritable variance of intelligence, which is comparable to the most robust effect sizes in behavioural research.46
That they are "excited" to account for at best 2.5% of high IQ through genetics suggests that genetics is not a large contributor to high intelligence.
Previous studies demonstrating high heritability of IQ did not discriminate between genetic inheritance and social/cultural/environmental inheritance. Clearly, the latter are more significant contributors than is genetics.