Children who find it difficult to focus when they are six years old earn less than adults, research suggests.
A study found six-year-olds who have their head in the clouds take home less each year when they reach their thirties.
When their lack of focus was scored from zero-to-three, just a one point decrease led to the boys earning $ 1,271.49 (£ 1,007) less a year. Inattentive girls suffered from $ 924.25 (£ 732) salary cut, according to the research at the University of Montreal.
Aggressive boys who bully, bite or kick the consequences in later life, earning on average $ 699.83 (£ 554) less a year. However, the same was not true for girls.
Researchers worry poor school at school may affect a youngster's academic performance, which then impacts their career path.
And violent boys may mix with the wrong crowd, which also sets back their school achievements.
Children who struggle to focus in reception earn less than adults, research suggests (19659011) The research was led by Dr. Sylvana Côté, a professor in the school of public health.
'Our study shows that childhood involvement is associated with a wide range of long-term adverse outcomes, including lower earnings over the course of a career,' the researchers wrote in the journal JAMA Psychiatry.
Poor attention spans, hyperactivity and aggression in childhood have been linked to everything from unemployment to financial woes in later life.
This has 'implications for society', with such individuals being more likely to suffer from mental health conditions and to claim benefits, the researchers add. However, childhood behaviors may be modifiable and are easier to change. than IQ or family background.
To uncover how our childhood attention span impacts later salary, the researchers analyzed data from the Quebec Longitudinal Study of Kindergarten Children.
The study asked primary school teachers to rate the behavior or 2,850 five-to-six year olds.
Inattention was defined as having one's head in the clouds, lacquering concentration and being easily distracted.
The teachers also noted any hyperactivity or physical aggression, such as kicking and biting.
These were rated on a three-point scale, with zero indicating never and three often.
In the first study of his child, the same children's government tax returns were analyzed when they reached 33-to-35. WHAT IS ADHD?
Attention Deficit Hyperactivity Disorder (ADHD) is a behavioral condition defined by inattentiveness, hyperactivity, and impulsiveness. Some 3.6 per cent of boys and 0.85 per cent of girls suffer in the UK.
Symptoms typically appear at early age and become more noticeable as a child grows.
Premature babies and those with epilepsy or brain damage are more at risk.
ADHD is also linked to anxiety, depression, insomnia, Tourette's and epilepsy.
There is no cure.
A combination of medication and therapy is usually recommended to relieve symptoms and make day-to-day life easier.
Source: NHS Choices
The men earned on average $ 33,300 (£ 26,391) a year and the women $ 19,400 (£ 15,375) – at 71 per cent disparity.
Results revealed both men and women who had poor attention spans as children took home less than adults.
But the boys who were in a position that benefited others went to do better.
Every one extra point on the 'pro-sociality score' boosted a man's later salary at $ 476.75 (£ 377).
Again, pro-sociality in childhood did not benefit the girls' futures.
The researchers speculate this may be due to young females with 'pro-social behaviors' being more likely to pursue' socially orientated but not traditionally high-earning 'jobs, such as teaching or nursing.
' We expected to Find differences between boys and girls, and we did find some important ones, 'said Professor Côté.
' We expected hyperactivity to be the most important variable, but in fact it turned out to be less important than simple lacquer or attention. '
The 336 participants who did not earn anything more likely to have suffered behavioral problems, as well as poor academic performance and family issues, as children.
And all this has nothing to do with intelligence or IQ because extreme cases have been excluded from the sampling, "Professor Côté said.
The researchers calculated a one point reduction in inattention scores among six year olds would theoretically help one earns $ 3,077 (£ 2,438) more a year, while adding $ 1,915 (£ 1,517) to women's salaries.
"Over a 25-year career, the differences between the two groups can reach $ 77,000 (£ 61,010)," Professor Côté said.
Poor concentration may affect a child's performance at school, which then impacts them throughout their life.
'Inattention has been repeatedly associated with low educational attainment, which has been associated with lower occupational status and earnings,' wrote
And aggressive behaviors early on may have similarly long-lasting effects.
'Antisocial behavior in adolescence, which is more prevalent among individuals with attention and behavioral problems attainment, 'the researchers wrote.
' [And] an association with delinquent peers could increase the risk of antisocial behavior and low educational attainment. '
Attention spans aside, it was the difference between the male and female participants' Salaries that left the researchers' reorganization.
'These girls are now 35-to-40 years old,' Professor Côté said. 'They are educated as boys and have similar experiences.
'Are there any individuals, family or school factors in childhood or adolescence that would explain the income gap? That's what we'll try to find out. '
Joe Levenson, director of campaigns and communication at the feminist-charity Young Women's Trust, told MailOnline: "We know inequalities set in at a young age.
'Stereotypes such as encouraging girls to care for dolls while boys play with chemistry sets undoubtedly have an impact on their future career and earnings.
'We know women are more likely to work in sectors like cleaning and care, where they are paid very little, while they are dominating jobs in science and technology.
' These stereotypes continue holding women back as they enter the workplace , where they often struggle to gain traditionally better-paid jobs.
"Employers must do more to stamp out discrimination and ensure a level playing field and help women into male-dominated workplaces."