/sci/ - Science & Math

>It appears that dysgenic fertility is indeed a Jensen effect. Not only is the effect significant in the majority of cases (five out of the seven analyses – in all cases the effect trends in the expected positive direction) but its effect magnitude is relatively large and is on a par with other variables for which Jensen effects have been recorded (e.g. Jensen, 1998; Rushton & Jensen, 2010). This finding using a large and representative sample of the US population, along with subpopulations and a well validated measure of intelligence, therefore allows us to place dysgenic fertility into the genetic nexus of the Jensen effect.
>The White males exhibit the least dysgenic fertility of all groups examined, with fertility differentials being positive in most cases. It must be noted however that the abilities with respect to which the White males are apparently in ‘eugenic’ fertility are the ones exhibiting lower g-loadings. Hence, even for this group the tendency is for fertility to be depressed on highly g-loaded abilities.
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>The finding of a Jensen effect on dysgenic fertility is significant to future research, as in light of the aforementioned findings it strongly suggests that ‘genetic g’ really has been in decline since the end of the 19th century. This reinforces the significance of the idea that changing genotypic IQ has had real world impacts on important factors such as the rates of scientific and technological innovation amongst Western populations (Woodley, 2012a).