Variance in IQ scores of different groups

As mentioned in The Usage of IQ Tests, the IQ scores of different groups of people have been historically used in ways that are grotesquely alarming. This article seeks not to explore such careless calculations nor entertain these baseless biases.

Instead, we shall be simply going through some conclusions of various research endeavors that report on the difference in IQ scores among different groups of people. Some of these conclusions are rather interesting, at the very least, and even quite humorous when pondered upon. Others can be controversial, and should be considered in careful comprehension rather than taking them at face value.

The Difference in IQ Scores of Men and Women

A quick google search would return you results that may fly any modern-minded individual into a violent fit of rage. Yes, over the course of history, men have tended to score higher in IQ tests than their female counterparts.

There’s been much published research that employs the use of the Wechsler Adult Intelligence Scale that report findings indicating a slight difference in the IQ scores of men over women in the favor of the former, albeit the degree of said variance differs from country to country. In China and Japan, the IQ scores of men tended to be higher than that of women by an average of four points. In United States and Canada, this variance consists of two to three points instead.

A meta-analysis conducted by Richard Lynn and Paul Irwin in 2004 also reports a difference in mean IQ scores between the two groups. The Raven’s Progressive Matrices were used, and was found that the mean IQ of male participants exceeded that of women participants by about five points.

However, one must also note that those said IQ tests were traditionally designed to measure things at which men were better at than women in the first place, such as spatial insight and mathematics. Modern tests are much more balanced in this regard, and are likely to yield vastly different results.

In fact, if one were to look at the majority of research on intelligence and IQ levels, one will find that most studies find that there is no significant difference between men and women with regards to general intelligence.

And another area that has since been pointed out is the clear lack of consideration for gender inequality and the influence it has on intelligence levels and cognitive development. When properly considered, one can find that any slight difference in IQ levels is likely due to the historical (and current, though to a lesser degree) differences in an individual’s educational development due to his/her gender.

It can even be said that for such a minute difference to have been shown between the two different sexes, is—if anything—indicative of how women may be slightly more intellectually incline, due to their lack of a significant lag behind their more privileged male counterparts.

In fact, the journal of Psychological Bulletin has published a meta-analysis that draws from 97 years of 502 effect sizes and 369 samples, with results showing that—regardless of IQ scores—women have been found to outperform males throughout elementary and junior levels of school, high school, and even at undergraduate and graduate levels. Other recent research has also reported on the clear findings of how women have been grossly underrepresented in higher education—and extraordinarily so in the fields of natural sciences, technology, engineering, and mathematics.

The Difference in IQ Scores of Different Races

It is extremely unlikely that intelligence, as in intellectual inclination and capacity, is something that differs by race in a hereditary manner. Differences have been found historically, but these differences are overtly influenced by cultural factors such as culturally influenced work attitudes, socio-economic statuses, access to proper healthcare and educational systems, and the quality of said healthcare and education.

Any claims to how one race is superior to another in terms of intellectual inclination and capacity is an unintelligent one that is not only illogical, but unsupported, mal-intended, and conceitful.

The Difference in IQ Scores of People of Different Heights

Yes, there has been a study conducted to sieve out any significant difference in IQ levels between the tall and the short, albeit the soundness of methods employed, and, in turn, the accuracy of results found may indeed be rather questionable.

Regardless, the Scottish study posits that height and intelligence are positively correlated, though not significantly so. However, this particular research endeavor has also inherently proven itself to be slightly inconsequential, in their own finding that other factors such as educational levels often play a far bigger role in one’s IQ score, and that height, amongst the many other irrelevant characteristics historically named (like race and sex), are extremely poor predictors of one’s IQ score or intelligence levels.

And with that out of the way, let us once again return to more consequential subject matters, such as Culture-Fair Intelligence Tests or How to Improve Your IQ Score. Alternatively, you can simply click here for a full list of related topics.