Siblings may have as much impact on delinquency as peers and parents. To determine the degree of impact, a meta-analysis was performed on studies investigating delinquency in siblings. A literature review identified 26 non-redundant studies on sibling delinquency and 36 unique samples of sibling pairs and children who estimated delinquency in a sibling or in their sibling network. A medium pooled effect size was obtained, which decreased only slightly when the analysis was restricted to longitudinal estimates. There was a fair amount of heterogeneity in the results but only two out of 21 moderator effects were significant. One moderator effect indicated that direct reports of delinquency from a sibling produced a significantly stronger effect than when perceived sibling delinquency estimates were used, and the other indicated that longitudinal studies performed in the United States generated a higher pooled effect size than longitudinal studies conducted outside the United States. There was also greater concordance for delinquency in same-sex siblings than in mixed-sex dyads and a non-significant trend in longitudinal studies showing transmission progressing from older to younger siblings. These results suggest that siblings are a salient risk factor for delinquency and that they are potentially important in the development of offending behavior.

兄弟姐妹对犯罪的影响可能与同龄人和父母一样大。为了确定影响程度，对调查兄弟姐妹犯罪的研究进行了荟萃分析。一项文献回顾确定了 26 项关于兄弟姐妹犯罪的非冗余研究和 36 个兄弟对和儿童的独特样本，这些样本估计了兄弟姐妹或其兄弟网络中的犯罪行为。获得了中等合并效应大小，当分析仅限于纵向估计时，它仅略有下降。结果存在相当多的异质性，但 21 个调节效应中只有两个显着。一个调节效应表明，直接报告兄弟姐妹的犯罪行为比使用感知的兄弟姐妹犯罪估计时产生的影响要强得多，另一个表明在美国进行的纵向研究比在美国以外进行的纵向研究产生了更高的汇总效应量。同性兄弟姐妹的犯罪行为也比混合性别的兄弟姐妹更一致，纵向研究显示从年长的兄弟姐妹传播到年幼的兄弟姐妹的趋势并不显着。这些结果表明，兄弟姐妹是犯罪的一个显着风险因素，并且他们在犯罪行为的发展中具有潜在的重要意义。同性兄弟姐妹的犯罪行为也比混合性别的兄弟姐妹更一致，纵向研究显示从年长的兄弟姐妹传播到年幼的兄弟姐妹的趋势并不显着。这些结果表明，兄弟姐妹是犯罪的一个显着风险因素，并且他们在犯罪行为的发展中具有潜在的重要意义。同性兄弟姐妹的犯罪行为也比混合性别的兄弟姐妹更一致，纵向研究显示从年长的兄弟姐妹传播到年幼的兄弟姐妹的趋势并不显着。这些结果表明，兄弟姐妹是犯罪的一个显着风险因素，并且他们在犯罪行为的发展中具有潜在的重要意义。