examination of behavioral inhibition at 14 months old can forebode aspect of adult personality   –   the youngest years this has been shown .

“ Give me the child until he is seven , and I will give you the man , ” the oldJesuit sayinggoes . Many masses have wondered if adult personality is   set considerably earlier in life . Yet science has provided few answer , spoil by the challenges of go study that take decades to produce results .

Nevertheless , Dr Alva Tangof the University of Maryland and colleague have tackle the interrogation , assessing 165 infants at 14 month old and then again decades afterwards . unavoidably , there was a substantial drop - off in participation , but the squad   write   inProceedings of the National Academy of Sciencesthat   they   " provide the potent and early evidence showing that babe with an inhibited temperament at 14 months became introverted adults . ”

Psychologists utilize behavioural suppression ( BI ) to name baby who , in the newspaper publisher ’s words , show “ overly cautious , fearful , and avoidant responses to unfamiliar people , object , and situation compared to non - inhibited infant . ” The same characteristics have been identified in the immature of many non - human mintage .

Infants in the study with high BI were more likely to be set aside and introverted adults with   fewer romantic family relationship and they identify   lower societal functioning with friends and family .   gamy baby BI was also associated with anxiety and depression in maturity .

The finding could provide an chance for other treatment that   melt off the endangerment of genial unwellness , although there are dangers in commemorate a tyke as recoil for depression from such an other age .

Moreover , the authors acknowledge the size of it of the consequence they find were modest . Many children with high BI were not reserve at all as adults , let alone prone to depressive disorder . Infant BI is likely just one factor among many that shape adult personality .

Other scientists have shown BI incline to persist into former childhood , marked by greater social withdrawal and difficulty in form equal relationships . However , even those studies started at age 3 or 4 and relied on parental surveys .

Tang not only started in the first place , but had trained commentator assess the infants ' behavior in a new surround at 14 calendar month , fall out by carry run at 15 . Participants ' brainstorm were then measure out with electroencephalogram and surveys at 26 .

The paper recognize the issue of the report were not representative , being drawn from mostly upper - midway class suburbia in the Washington DC area and overwhelmingly livid . Given their backgrounds , it is unsurprising that by 26 , they were vastly more likely than the oecumenical population to have a university degree and be in professional use . Infant BI had no pregnant effect on educational event , career success , or even being in a romantic relationship when the resume was done .