Finding the relationship between head size and intelligence takes a bit of a historical journey. The dates we should visit first are the 19th and 20th centuries. These years are still in the current age of science. with primitive methods the years when he tried to get ahead, or rather crawl.

Paul Broca, Franz Gall, Carl Wernicke Phrenology and craniometry (phrenology and craniometry) was one of the most popular theories in these years when scientists like scientists were not satisfied with a single field and were interested in psychology, anthropology and physiology alike.

In those years, it was enough to measure a person’s head to find out his personality traits and intelligence level.

What you see above is a head size measuring device from 1902. Let me start by saying The theory of phrenology is not a scientifically valid theory today. However, in those years, that is, in the 19th and 20th centuries, the theory that states that it is necessary to measure the size and shape of the brain regions to determine a person’s personality traits and intelligence level, is the theory of the phrenology.

Craniometry, on the other hand, is a technique still used today by anthropologists, unlike phrenology. This technique involves taking measurements of brain size, brain weight, and other physical characteristics. But the critical point here is; of this technique It is not used to measure intelligence and determine personality, but only to research human evolution.

So you can measure the size of your head.

Today, head measurement is mainly used to monitor the development of babies. health personnel done by. You can still do this with a tape measure that you take with you to measure the circumference of your own head.

The measurement of the circumference of a person’s head is usually taken above the eyebrows and ears. head size genetic and environmental factors It is thought to be influenced by many factors such as

We assume that you have learned not to rely on intelligence tests that you find on the internet.

Intelligence (IQ) is a complex trait that develops with education and consists of a combination of genetic and environmental factors. Generally; assesses multiple cognitive skills, such as memory, problem solving, and language skills measured by cognitive ability tests.

For example, these tests have separate training and certifications and certain professional groups psychologists can apply these tests. The so-called tests on the internet that show how smart you are in 10 minutes have no validity or reliability.

Let’s look at some studies on the correlation between head size and intelligence.

A meta-analysis study published in 2015 in the journal Neuroscience & Biobehavioral Reviews (that is, in the study that compiled the research published to date), examined the correlation between human brain size and intelligence. In this study, 88 studies were examined. According to the results of the study, there is a relationship between the size of the head circumference and intelligence. even if there is no relationship There may be a positive relationship between brain size and intelligence.

A similar study was published in 2015 by Michael A. McDaniel in the journal Intelligence. in this research brain size and intelligence The mutual relationship was investigated. Similarly, it was found that brain volume size can have a positive relationship with intelligence level.

That is what both studies show No matter how big your head is, the size of the brain inside matters.. Studies show that the larger the brain size, the higher the intelligence level.

• Sources: Neuroscience and Biobehavioral Assessments, Intelligence