摘要: Abstract In this ecological study, a robust negative correlation of r = − .62 (P .05) whereas GDP per capita had the highest (β = .35, P > .01). This result is interpreted in light cultural feedback theory, whereby it suggested that consanguinity could subtly influence IQ at larger scales as small handicaps bought about through inbreeding being amplified into much differences their effect on factors maximize such access to education and adequate nutrition. Finally, consideration given future potential research directions.