I previously talked about how scores on an IQ test are developed, and what they mean mathematically. Now, I’ll look at what they can mean for individuals.
IQ scores can be seen as the mind equivalent of BMI scores. Although both numbers can provide useful information when averaged across large groups, they shouldn’t be used to directly compare individuals, or used to sum up a person in one statistic. BMI can be helpful for an average-height and middling-framed Western person, but it is near-useless for athletes, who will often score as overweight or obese due to their increased muscle mass. Similarly, IQ measurements may be an accurate representation for a neurotypical person who is familiar with Western education systems and standardized testing. But they are not an accurate summation for people with neurodevelopmental disorders, or people who aren’t used to standardised tests and solving problems in a room with a stranger.