 Also, "'adolescent-limited' antisocial behavior emerges alongside puberty, where otherwise healthy youngsters experience dysphoria during the relatively role-less years between biological maturation and access to mature privileges and responsibilities", called the maturity gap.They look at the taxonomy theory, which states that the gender difference in crime are based on sex differences in the risk factors for life-course-persistent antisocial behavior.Based on research, girls are less likely than boys to have nervous system dysfunctions, difficult temperament, late maturity in verbal and motor development, learning disabilities, and childhood behavioral problems.