This is almost double compared to children living with both parents, as only 6 percent of these were found to have psychological disorders, at the same age.
According to the research that forms a part of the Millennium Cohort Study initiated by researchers from London University’s Institute of Education, family structure, parental educational qualifications and the household income played a major role in shaping the behavior of the child at a young age and if any of these factors is on the lower side, it can have a “damaging long-term consequences."
Lisa Calderwood, co-author of the study, said, “Living apart from natural fathers can be associated with poverty and negative outcomes for children.”
A separate research has also found that kids having younger mothers also faced more difficulties in their growing years than those children, who had a mother aged 30 or above.
According to the study, “They were far less likely to have married parents and more than seven times as likely to have step fathers.”
The two studies involve analysis of nearly 14,000 British children, born between the year 2000 and 2002 and their parent study is still on-going.
In the first study, the researchers reviewed 13,500 mothers to observe the behavior of the child. The mothers were asked to rate their children on parameters, including hyperactivity, conduct, emotional problems, and relationships with friends.
The researchers categorized the children on three groups, ranging from “normal” to “serious behavioral problems”.
On analysis, it was found that both, stepchildren and children with single parent had the highest probability of being misbehaved. This comprised 15 percent stepchildren and 12 percent children with lone parents.
The researchers said, “Behavioural problems were less likely among children living in families with higher levels of parental qualifications.”
In the second study, it was found that four out of 10 children having mothers, who were below 30 years, had a troubled childhood.
Calderwood said, "As these experiences are particularly concentrated among children of young mothers these findings provide support for policies aimed at reducing teenage pregnancy. They also indicate that families with young parents may benefit from further targeted government support.”
The studies published on Oct. 15 are funded by the Economic and Social Research Council.