首先從來無人禁止你做研究比較分析racial intelligence啊
如果唔係點會有Jansen之類嘅人出文呢
APA篇review都講明
// (See Rushton & Jensen, 2005a, 2005b, Gottfredson, 2005, and Lynn & Vanhanen, 2002, for the view that the Black–White IQ difference is owing substantially to genetic differences between the races and that indirect evidence having to do with such factors as reaction time and brain size is probative.//