Individual psychological or behavioral risk factors that may make offending more likely include low intelligence, impulsiveness or the inability to delay gratification, aggression, lack of empathy, and restlessness.
Other risk factors that may be evident during childhood and adolescence include, aggressive or troublesome behavior, language delays or impairments, lack of emotional control (learning to control one's anger), and cruelty to animals.
Repeated and/or violent offending is likely to lead to later and more violent offenses.
When this happens, the offender often displays antisocial behavior even before reaching adolescence.
Other factors that may lead a teenager into juvenile delinquency include poor or low socioeconomic status, poor school readiness/performance and/or failure, peer rejection, or attention deficit hyperactivity disorder (ADHD).
There may also be biological factors, such as high levels of serotonin, giving them a difficult temper and poor self-regulation, and a lower resting heart rate, which may lead to fearlessness.
Although children are rejected by peers for many reasons, it is often the case that they are rejected due to violent or aggressive behavior.
This rejections affects the child's ability to be socialized properly, which can reduce their aggressive tendencies, and often leads them to gravitate towards anti-social peer groups.
This association often leads to the promotion of violent, aggressive and deviant behavior.
"The impact of deviant peer group influences on the crystallization of an antisocial developmental trajectory has been solidly documented." Aggressive adolescents who have been rejected by peers are also more likely to have a "hostile attribution bias", which leads people to interpret the actions of others (whether they be hostile or not) as purposefully hostile and aggressive towards them.