A 2006 report from ScienceDaily, still relevant today:
Children in low-income families start off with higher levels of antisocial behaviour than children from more advantaged households. And if the home remains poor as the children grow up, antisocial behaviour becomes much worse over time compared to children living in households that are never poor or later move out of poverty, says new University of Alberta research.
“In other words, the lowest levels of antisocial behaviour are found in kids whose parents start and stay in the highest income bracket while their kids grow up,” says Dr. Lisa Strohschein, author of the study and sociologist at the U of A.
While the findings show that the effects of low income at an early age on antisocial behaviour–conduct such as bullying, being cruel, breaking things, cheating or telling lies–persist as kids get older, depression seems to have the opposite effect. The effects of starting off in a low-income household on child depression lessen as time goes on, regardless of later income levels. The research is published in the current issue of the “Journal of Health and Social Behavior.”
“These findings might mean that antisocial behaviour is an example of biological embedding–it is possible that poverty early in life helps to set into motion a consistent pattern of antisocial behaviours that are difficult to change once learned,” says Strohschein. This finding supports at least one developmental theory that posits that early childhood constitutes a sensitive period of development in which insults suffered during this time are likely to have long lasting effects on child development.
Looks to me like these finding disprove the rather simplistic theory that anybody who grows up poor can compete with those who grow up rich or middle class and succeed, and if they don’t it’s because they’re just lazy. Read more here.