Here is a sample of the way the society views this matter:
on the News
Watchtower 3-15-79 Page 23
Whites Smarter than Blacks?
• The writings of Cyril Burt, the British founder of educational psychology, were viewed for years as ‘proof’ that racial differences in intelligence are caused by heredity. Recent findings published in "Science" magazine have shown "beyond any reasonable doubt" that such data collected by Burt was "fabricated." In his widely acclaimed writings, Burt asserted that whites were smarter than blacks, that upper-class children were mentally superior to slum children, that the English were more intelligent than the Irish and Jews, and that men were brainier than women.
It was previously thought that some of his errors resulted "from carelessness rather than deliberate fraud," but the disclosure revealed that the entire column of numbers arranged by Burt was identical with figures published over 30 years earlier and derived from a completely different survey. He merely picked various IQ’s and assigned these to different classes of persons.
The report summarized recent findings of IQ tests: "[An IQ test] measures only a particular aspect of mental ability. Different tests test different mental faculties. In any group of people there will be those who excel in one capacity but do poorly in another." No race is inherently more intelligent than another for "[God] made out of one man every nation of men."—Acts 17:26.
In all the articles I looked at this was the theme - race, and secondarily gender! I never thought of race in regards to IQ - why do you suppose the WTS is so fixated on that? Strange - but not unusual for the odd way they deal with things I guess.