Department of Psychology, University of Alabama at Birmingham, 1720 Second Ave South, CH415, Birmingham, AL 35294-1170.
Pediatrics. 2014 Jan;133(1):7-14. doi: 10.1542/peds.2013-0628. Epub 2013 Dec 9.
To determine how early puberty and peer deviance relate to trajectories of aggressive and delinquent behavior in early adolescence and whether these relationships differ by race/ethnicity.
In this longitudinal study, 2607 girls from 3 metropolitan areas and their parents were interviewed at ages 11, 13, and 16 years. Girls reported on their age of onset of menarche, best friend's deviant behavior, delinquency, and physical, relational, and nonphysical aggression. Parents provided information on family sociodemographic characteristics and girls' race/ethnicity.
Sixteen percent of girls were classified as early maturers (defined by onset of menarche before age 11 years). Overall, relational and nonphysical aggression increased from age 11 to age 16, whereas delinquency and physical aggression remained stable. Early puberty was associated with elevated delinquency and physical aggression at age 11. The relationship with early puberty diminished over time for physical aggression but not for delinquency. Best friend's deviant behavior was linked with higher levels of all problem behaviors, but the effect lessened over time for most outcomes. Early puberty was associated with a stronger link between best friend's deviance and delinquency, suggesting increased vulnerability to negative peer influences among early-maturing girls. A similar vulnerability was observed for relational and nonphysical aggression among girls in the "other" racial/ethnic minority group only.
Early puberty and friends' deviance may increase the risk of problem behavior in young adolescent girls. Although many of these associations dissipate over time, early-maturing girls are at risk of persistently higher delinquency and stronger negative peer influences.
确定性早熟和同伴偏差与青少年早期攻击性和犯罪行为轨迹的关系，以及这些关系是否因种族/民族而异。
在这项纵向研究中，来自 3 个大都市区的 2607 名女孩及其父母在 11、13 和 16 岁时接受了访谈。女孩报告了初潮年龄、最好朋友的偏差行为、犯罪行为以及身体、关系和非身体攻击的情况。父母提供了有关家庭社会人口统计学特征和女孩种族/民族的信息。
16%的女孩被归类为早熟者（定义为 11 岁前初潮）。总体而言，从 11 岁到 16 岁，关系和非身体攻击呈上升趋势，而犯罪和身体攻击则保持稳定。性早熟与 11 岁时犯罪和身体攻击水平升高有关。随着时间的推移，与身体攻击的关系减弱，但与犯罪的关系没有减弱。最好朋友的偏差行为与所有问题行为的水平都较高有关，但随着时间的推移，大多数结果的影响会减弱。性早熟与最好朋友的偏差行为和犯罪行为之间的联系更强，这表明早熟女孩更容易受到负面同伴影响。在其他种族/少数民族群体中，女孩的关系和非身体攻击也存在类似的脆弱性。
性早熟和朋友的偏差行为可能会增加少女出现行为问题的风险。尽管这些关联中的许多随着时间的推移而消失，但早熟的女孩仍然面临持续更高的犯罪风险和更强的负面同伴影响。
