Category: Intelligence

High intelligence is linked to holding certain attitudes, psychological research finds.

More intelligent people are less likely to be prejudiced against same-sex couples, research finds.

People of lower intelligence, though, are more likely to hold homophobic attitudes.

The conclusions come from an Australian study of 11,654 people who were given intelligence tests.

All were asked if they agreed with this statement:

“Homosexual couples should have the same rights as heterosexual couples do.”

Less intelligent people were more likely to be prejudiced on LGBT issues, the results showed.

People with low scores on the verbal ability test were particularly likely to be prejudiced.

Higher levels of education were, however, consistently linked to being less prejudiced.

Dr Francisco Perales, the study’s author, writes:

“Altogether, the findings provide clear evidence that cognitive ability is an important precursor of prejudice against same-sex couples.”

Dr Perales explained that studies have generally found that prejudice is more prevalent among people of low intelligence:

“Research conducted chiefly in the US, Canada and Western Europe reports correlations between low cognitive ability and support of prejudicial or non-egalitarian attitudes towards certain social groups (including ethnic minorities, migrants, women and people with AIDS), as well as related constructs, such as conservatism, ethnocentrism, authoritarianism,
and dogmatism.”

High IQ prejudice

Some psychologists, though, think this is not the whole story about the link between intelligence and prejudice.

A survey of 5,914  people in the US has tested prejudice against 24 different groups.

It found that both people of high and low intelligence are prejudiced — just against different groups.

People of higher intelligence showed prejudice towards groups perceived as conservative and conventional.

These included the military, Christians and big business.

Dr Mark Brandt, the study’s first author, explained:

“Whereas prior work by others found that people with low cognitive ability express more prejudice, we found that this is limited to only some target groups.

For other target groups the relationship was in the opposite direction.

For these groups, people with high levels of cognitive ability expressed more prejudice.

So, cognitive ability also does not seem to make people immune to expressing prejudice.”

The rather depressing conclusion is that most people are prejudiced against those they don’t agree with.

The studies were was published in the journals Intelligence and Social Psychological and Personality Science (Brandt & Crawford, 2016; Perales, 2018).

Thousands of people were asked how smart they wanted to be.

When asked, people choose an average IQ of around 130, research shows,

This level makes a person smart, mildly gifted even, but certainly not a genius.

In fact, people are surprisingly modest across a wide range of personal traits, when asked their ideal level.

When asked how long they’d like to live, the average is 90 years, which is only a little higher than normal life expectancy.

Even when given the option of taking a magic pill that gives eternal youth, they still only go for 120 years, on average.

Professor Matthew J. Hornsey, who led the research, said:

“Our research shows that people’s sense of perfection is surprisingly modest.

People wanted to have positive qualities, such as health and happiness, but not to the exclusion of other darker experiences — they wanted about 75% of a good thing.”

People who live in more holistic cultures — like Japan and China — were even more modest in the ideal levels they chose.

This reflects the fact that Eastern philosophies often emphasise the coexistence of good and bad.

Professor Hornsey explained:

“Interestingly, the ratings of perfection were more modest in countries that had traditions of Buddhism and Confucianism.

This makes sense — these Eastern philosophies and religions tend to place more emphasis on the notion that seemingly contradictory forces coexist in a complementary, interrelated state, such that one cannot exist without the other.”

The study’s conclusions come from 2,392 people in Australia, Chile, China, Hong Kong, India, Japan, Peru, Russia, and the United States.

The results showed that people were much more interested in being perfectly healthy than perfectly happy.

Professor Hornsey said:

“This principle of maximization is threaded through many prominent philosophical and economic theories.

But our data suggest that people have much more complex, blended notions of perfection, ones that embrace both light and dark.”

The study was published in the journal Psychological Science (Hornsey et al., 2018).

People with high fluid intelligence are likely to have this ability.

The ability to store more items in short-term memory indicates a higher fluid IQ, psychological research reveals.

While there may be no limit to long-term memory, short-term memory is much smaller.

The average number of things people can store in short-term memory — whether words, numbers or whatever — is four.

Short-term memory only lasts around 15 to 30 seconds.

Being able to store more than this, suggests an above-average IQ.

However, being able to store these items clearly is NOT linked to IQ.

Dr Keisuke Fukuda, the study’s first author, said:

“Clarity, relates to how well a person can detect small changes.”

In other words, high IQ is linked to the quantity of items a person can store in short-term memory, not the quality.

For the study, 79 people had their fluid intelligence tested.

Fluid intelligence refers to the speed at which the brain works.

It is like the raw power of an engine or the speed at which a computer can process information.

They were then shown between four and eight items on a screen at the same time.

After a second they were shown another object and asked whether it had appeared in a particular location.

People with higher fluid intelligence were better at remembering if they had seen the item before.

However, people with higher fluid intelligence were no better at remembering where the item had been.

Professor Edward Awh, study’s co-author, said:

“The number of things people can remember is robustly correlated with fluid intelligence — the larger number remembered, the higher the IQ.

Resolution in memory is not predictive of IQ at all.”

The study was published in the journal Psychonomic Bulletin & Review (Fukada et al., 2011).

How long can you wait for your reward?

Having stronger self-control is a sign of higher intelligence, research finds.

Faced with temptation, more intelligent people stay cooler.

In the study, those with higher intelligence waited longer for a larger reward.

For the study, 103 people were given a series of tests that involved choosing between small financial rewards today or larger ones later on.

For example, let’s say I offer you $5 right now, or $10 in a month’s time.

Choosing the larger reward later on makes sense, but immediate returns are tempting.

Psychologists call this ‘delay discounting’: the longer people have to wait for a reward, the more they discount its value.

In other words, “a bird in the hand is worth two in the bush”.

The results showed that people with higher intelligence could wait longer for their reward, so demonstrating higher self-control.

Brain scans revealed that people with higher IQ had greater activation in an area called the anterior prefrontal cortex.

This area of the brain allows people to manage complex problems and deal with competing goals.

Dr Noah Shamosh, the study’s first author, said:

“It has been known for some time that intelligence and self-control are related, but we didn’t know why.

Our study implicates the function of a specific brain structure, the anterior prefrontal cortex, which is one of the last brain structures to fully mature.”

The study was published in the journal Psychological Science (Shamosh et al., 2008).

The personality traits that are signs of high intelligence.

People whose personalities are happy, energetic and lively have higher IQs, research finds.

Higher IQ is linked to experiencing more positive emotions, enjoying complex problems, having a larger vocabulary and understanding things more quickly.

The researchers found that smarter people were less stressed when given a taxing task to do.

They were also more engaged with it.

People with higher IQs were more likely to agree with statements like:

• I am quick to understand things.
• I have a large vocabulary and enjoy being intellectually engaged.
• I enjoy tackling difficult problems.

The more people agreed with statements like these, the higher their IQ was, researchers found.

The study included 440 people who completed surveys of their happiness and IQ.

The results showed that energetic lively people had higher fluid intelligence.

The study’s authors conclude:

“The results indicated that Intellect was generally associated with lower stress (low distress and worry and high task engagement) before and after intelligence tests.”

Fluid intelligence refers to the speed at which the brain works.

It is like the raw power of an engine or the speed at which a computer can process information.

Fluid intelligence is contrasted with crystallised intelligence.

Crystallised intelligence is something like general knowledge: the information that people have learnt about the world over the years.

The reason that IQ and happiness are linked could be down to how much importance is placed on being smart in Western cultures.

The authors write:

“It is striking that Intellect was correlated with affect even in Study 1, in which there was no requirement to perform an intellectual task.

At least in Western cultures, intellect may be of sufficient importance to the self-schema that it influences general emotional functioning.”

The study was published in the journal Personality and Individual Differences (Zajenkowskia & Matthews, 2019).

Three ways to tell if you have a high IQ.

People who can predict the behaviour of others have higher personal intelligence, research finds.

Two other signs of high personal intelligence are self-motivation and being able to anticipate desires.

The idea of personal intelligence is broader than IQ.

It involves using intelligence to predict people’s behaviour.

Someone high in personal intelligence is able to analyse correctly their own and other people’s personalities.

People high in personal IQ know how best to deal with other people and how they will react.

Professor John Mayer, the expert on personality and intelligence who came up with the theory, said:

“Think of all the ways we read and interpret the people around us each day: We notice body language and facial expressions to estimate one another’s moods.

We draw initial guesses about personalities based on how people dress and present themselves, and we adjust how we interact with them accordingly.

We run through scenarios in our heads, trying to anticipate how others will react, in order to choose the best course in dealing with a boss, a coworker, or a partner.”

Reviewing decades of research on personality and intelligence, Professor Mayer has found it comes more naturally to some:

“We pick up on small pieces of feedback about ourselves from others, which we incorporate into a fuller and more accurate perception of ourselves.

And we make all kinds of decisions–about work-life balance, the neighborhood we live in, or who we spend our time with–based on what we think will be the best fit for our personalities.”

Professor Mayer concludes:

“People who are high in personal intelligence are able to anticipate their own desires and actions, predict the behavior of others, motivate themselves over the long term, and make better life decisions.”

→ Discover 22 more signs of intelligence.

The book is called Personal Intelligence: The Power of Personality and How It Shapes Our Lives and is published by Scientific American/Farrar, Straus and Giroux, 2014.

The surprising traits that indicate high intelligence.

Being genuine, cooperative and sincere are all linked to having a high IQ, research finds.

Although being ‘nice’ is not linked in the popular imagination with being intelligent, this study found that it was.

The study also found that half of the connection between high IQ and being ‘nice’ was down to genetics.

Other personality features that are linked to high IQ include being a seeker of variety, intellectually curious, imaginative and sensitive to emotions.

All of these are aspects of ‘openness to experience’, which is one of the five major aspects of personality.

Openness to experience is frequently strongly linked to high IQ by studies.

The study included 2,488 people who were given tests of personality and intelligence at 12 and 18-years-old.

Genetic modelling was used to examine the links between intelligence, personality and genes.

The results were explained by the study’s authors:

“Intelligence as measured by IQ was positively associated with
openness to experience and agreeableness.

Moderate phenotypic correlations [genetic associations] between agreeableness and IQ were also of interest.

Earlier studies reported small correlations between intelligence and agreeableness.

There have been a few studies on altruistic behavior in young children that found a positive relation with IQ.”

In fact, people with high IQs are better at working well with other people, other studies have found.

That is why those with high IQs are so essential: without them society would not work.

Being cooperative, in particular, may have strong links to higher IQ, the authors write:

“…unique aspects of human cognition are driven by social cooperation.

The cooperative attitudes of the subjects scoring high on agreeableness could therefore be the shared underlying factor in the relationship with IQ.”

The study was published in the journal Personality and Individual Differences (Bartels et al., 2012).

The traits are so powerful that they are linked to intelligence when measured almost 40 years later.

Insatiable curiosity, an active fantasy life, a sensitivity to emotions and an appreciation of art and beauty are all linked to high IQ, a study finds.

High IQ may have a particularly strong link to curiosity because intelligence creates a ‘cognitive hunger’ — a desire to think.

Over the years, higher IQ drives people to keep exploring new experiences to satiate this hunger.

Curiosity, along with sensitivity to emotions, appreciation of beauty and an active fantasy life are all aspects of the major personality trait called ‘openness to experience’.

Being open to experience is so powerful that it is linked to intelligence when measured almost 40 years later.

Children who scored higher on IQ tests at just 11-years-old were more open to experience when they were 50-years-old, the psychologists found.

The study’s authors explain their results:

“…childhood intelligence is indeed positively associated with adult trait Openness, even when it was assessed almost four decades earlier when participants were at 11 years.

Intelligence may influence the development of personality in that intelligent people develop habits to satisfy their curiosity and ‘‘cognitive hunger’’ which are an essential ingredient of Openness.”

The conclusions come from a huge study of 17,415 people born in the UK in one week in March 1958.

Over the following 50 years they were given various personality and intelligence tests.

Children with higher IQs were more open to experience because of higher motivation at school, greater support from their families and higher social status, the researchers found.

They explain how these factors fit together:

“Parents of higher socioeconomic status may foster children’s trait Openness by providing better resources such as choosing good schools and cultural environment (theaters, museums, traveling abroad, etc.); intelligent children tend to use more mental activities (such as abstract ideas, learning new
vocabularies, or math formulas) than those who are less intelligent; school settings (quality of teaching, good facilities) may enhance pupils to engage more in school learning.

All these three factors may influence educational and
occupational achievement, which in turn, may increase
the scores on Openness.”

In other words, they believe that it is a higher IQ that mainly drives the development of greater openness to experience.

The study was published in the Journal of Individual Differences (Furnham & Cheng, 2016).

This is not something people usually associate with intelligence — but the study clearly shows a link.

Highly intelligent people are more likely to be generous and altruistic, psychological research finds.

Altruistic people are unselfish and sometimes deny themselves so that others can have more.

Intelligent people may be more generous partly because they can afford it.

People with higher IQs generally have greater resources, or can expect to recover what they have given later on.

Generosity is not something people usually associate with intelligence — but this study clearly shows a link.

The study’s authors write:

“In the first study, we found that those who contributed more than their fair share to a public good were more intelligent, as measured by two relatively independent measures of general intelligence.

In the second study, we showed that those who possess a dispositional tendency to value joint benefits more than
their own, scored higher on an intelligence test.”

For the study, 301 people played games that involved either donating to others or keeping things for themselves.

The results revealed that intelligent people were more generous to others.

People who were more egotistical — keeping more for themselves — tended to be less intelligent.

People with higher IQs were more concerned with the public good.

The authors write:

“The evidence presented supports the possibility that unconditional altruism may serve as a costly signal of general intelligence because altruism is costly and is reliably linked to the quality ‘general intelligence’.

Consistent with the finding that children’s intelligence
predicts later socio-economic success better than parents’ attributes, we assume that intelligence is an indicator of future resources.

As a consequence, someone with high cognitive skills may be able to donate more in advance than someone with lower skills.”

In other words, intelligent people can afford to be more generous because they have more to give.

The study was published in the Journal of Research in Personality (Millet & Dewitte, 2007).