Carrying Capacity, IQ

[edit: we could call Gottfredson’s analysis a smart ratio analysis, which is an alternative to a smart fraction analysis a la Rindermann et al. (2009); they have different implications.]

[edit: note Gottfredson’s comment in the 3rd to last slide:
Sample predictions, if reliable brain‐boosters become available
“Opportunistic reversals in political rhetoric – To “racial gaps in IQ are  genetic” because “social justice requires eradicating effects of genetic disadvantage”

Some have voiced concern about the De-whitening of the West. This concern can and should be clarified, quantified, and critically examined; in general, when possible, qualitative concerns should be translated in quantitative analyses so to move discussions of HBD and society beyond mere speculative musings. As an example of quantification, below is a figure from Gottfredson (2009). No assumptions about genotype are made. I will leave it to others to expand on this topic. (A simple graph projecting the change in the ratio of innovators to dependents in the US due to the demographic shift over time would be a nice start.(1))

Gottfredson, 2009. 4 decisions in promoting cognitive enhancement. Slide 33. (Also here.)

(1). You can use the 2008 WAIS Standardization for the Adult Full Scale IQs (FSIQ), which is the relevant one. “Asian,” obviously includes non-Orientals; hence the relatively low scores. The N’s are small but according to Flynn, the WAIS standardizations are reliable measures. Alternatively, the 2010 SAT scores can be used.

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4 Responses to Carrying Capacity, IQ

  1. hbd chick says:

    thnx for drawing this up!

    question: are the black and east asian bell curves actually shallower and broader than the white bell curve, or is that just a little quirk in your graph (or in my eyeballs)?

    • Chuck says:

      It was a graph from Gottfredson (2009). In the graph, the Black curve is narrower (SD=13) and the East Asian is the same (SD =15). Usually, when ‘Asians’ are reported, as in the WAIS data or the SAT data, the SDs are larger as “Asian” includes more heterogeneity. (Blacks typically have lower SDs — both in the US and Africa; but it depends on the test.)

      The apparent difference between East Asians and Whites in the graph is an optical illusion. So it would be your mind, not your eyeball.

  2. Pingback: linkfest – 06/26/11 « hbd* chick

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