Neither. Research into cognitive ability points consistently to the same conclusion: there is no meaningful difference between men and women in average general cognitive ability. Small average differences do appear on a few specific abilities, but they are small next to the spread of scores found within each group, so knowing whether someone is a man or a woman tells you almost nothing about how they will score on an aptitude or IQ test.
Why there is no “smarter sex”
“Smarter” is not a scientific term, and intelligence is not a single quantity that can be ranked like height. What cognitive tests actually measure is performance on particular tasks: reasoning with words, reasoning with numbers, spotting patterns, holding information in mind, working accurately at speed. Most people are stronger on some of those than others.
When those measures are combined into an estimate of general cognitive ability, the male and female averages come out close enough that the difference carries no practical meaning. That result holds across large samples, different countries and successive generations of test.
It is also worth knowing how the major IQ batteries are built. They are developed and standardised so that the overall score does not favour either sex, with items and subtests balanced during construction. A headline claiming that one sex has a higher IQ is therefore almost always a claim about a single subtest, an unrepresentative sample, or a gap too small to mean anything for an individual.
Where small average differences do appear
Look at narrower abilities rather than the overall figure and some small, repeatable average differences do show up.
Spatial tasks. Mental rotation, judging how an object would look if it were turned, is the task where a small male average advantage is most consistently reported.
Verbal tasks. Some verbal measures, particularly fluency and writing, more often show a small female average advantage.
Numerical tasks. Findings here are mixed. Any difference is generally small, and it varies considerably between countries and changes over time, which is why it is usually read as reflecting schooling, expectations and opportunity rather than fixed ability.
Two points matter more than the differences themselves. These are averages across very large groups, not descriptions of individuals. And the abilities involved respond to practice: people get measurably better at mental rotation, or at reading comprehension under time pressure, when they do more of it.
The overlap is far bigger than the gap
This is the part the question usually misses. On any of these measures, the range of scores inside each group is much wider than the difference between the two group averages. Plotted side by side, the two distributions sit almost entirely on top of one another.
In practice that means the highest and lowest scorers on any given test include both men and women, and that a difference of a point or two between group averages, real though it may be in a large dataset, is useless for predicting how one particular person will do.
That is precisely why employers assess candidates individually. Cognitive ability tests are scored against a comparison group of other candidates, not against a male or female benchmark, and a well-designed assessment process is checked for exactly this kind of unfair difference before it is used.
What actually moves a test score
If the real question behind “who is smarter” is “how well will I do on the test?”, these are the things that change the answer.
Familiarity with the format. A large part of the difficulty in a timed test is procedural. Knowing what the question is asking before the clock starts is worth a great deal.
Practice. Scores on reasoning tests improve with practice, particularly for anyone who has not sat a timed test for some years.
Test conditions. Poor sleep, stress, interruptions and an unfamiliar device all cost marks.
Recent use of the skill. People who have been reading closely or working with numbers in their study or job tend to be quicker at those formats.
None of these has anything to do with sex, and all of them are within your control.
Find out where you actually stand
The only useful version of this question is a personal one: which abilities are you strong on, and which need work? The way to answer it is to sit the tests and look at your own profile.
- Logical reasoning tests, which measure pattern recognition and rule finding
- Numerical reasoning tests, which measure interpretation of data under time pressure
- Verbal reasoning tests, which measure how accurately you draw conclusions from written information
Most people find a clear spread across the formats, with a strongest and a weakest. That personal spread is far more informative, and far more actionable, than any comparison between groups.
