Atik, G., & Güneri, O. Y. (2013). Bullying and victimization: Predictive role of individual, parental, and academic factors. School Psychology International, 34, 658–673.
Ball, H. A., Arseneault, L., Taylor, A., Maughan, B., Caspi, A., & Moffitt, T. E. (2008). Genetic and environmental influences on victims, bullies and bully‐victims in childhood. Journal of Child Psychology and Psychiatry, 49, 104–112.
Barnes, J. C., & Boutwell, B. B. (2013). A demonstration of the generalizability of twin-based research on antisocial behavior. Behavior Genetics, 43, 120–131.
Bowes, L., Maughan, B., Ball, H., Shakoor, S., Ouellet-Morin, I., Caspi, A., . . . Arseneault, L. (2013). Chronic bullying victimization across school transitions: The role of genetic and environmental influences. Development and Psychopathology, 25, 333–346.
Brendgen, M., Boivin, M., Vitaro, F., Dionne, G., Girard, A., & Pérusse, D. (2008). Gene-environment interactions between peer victimization and child aggression. Development and Psychopathology, 20, 455–471.
Buist, K. L. (2010). Sibling relationship quality and adolescent delinquency: A latent growth curve approach. Journal of Family Psychology, 24, 400–410.
Camodeca, M., Goossens, F. A., Terwogt, M. M., & Schuengel, C. (2002). Bullying and victimization among school‐age children: Stability and links to proactive and reactive aggression. Social Development, 11, 332–345.
DiLalla, L. F. (2006). Social development of twins. Twin Research and Human Genetics, 9, 95–102.
DiLalla, L. F., & Mullineaux, P. Y. (2008). The effect of classroom environment on problem behaviors: A twin study. Journal of School Psychology, 46, 107–128.
Foy, A. K., Vernon, P. A., & Jang, K. (2001). Examining the dimensions of intimacy in twin and peer relationships. Twin Research, 4, 443–452.
Gini, G., & Pozzoli, T. (2009). Association between bullying and psychosomatic problems: A meta-analysis. Pediatrics, 123, 1059–1065.
Goldbaum, S., Craig, W. M., Pepler, D., & Connolly, J. (2003). Developmental trajectories of victimization: Identifying risk and protective factors. Journal of Applied School Psychology, 19, 139–156.
Gordon, L. M. (2015). Twins and kindergarten separation: Divergent beliefs of principals, teachers, parents, and twins. Educational Policy, 29, 583–616.
Griffin, R. S., & Gross, A. M. (2004). Childhood bullying: Current empirical findings and future directions for research. Aggression and Violent Behavior, 9, 379–400.
Hawker, D. S., & Boulton, M. J. (2000). Twenty years’ research on peer victimization and psychosocial maladjustment: A meta‐analytic review of cross‐sectional studies. Journal of Child Psychology and Psychiatry, 41, 441–455.
Hay, D. A., & Preedy, P. (2006). Meeting the educational needs of multiple birth children. Early human development, 82, 397–403.
Hodges, E. V., Boivin, M., Vitaro, F., & Bukowski, W. M. (1999). The power of friendship: Protection against an escalating cycle of peer victimization. Developmental Psychology, 35, 94–101.
Holm, S. (1979). A simple sequentially rejective multiple test procedure. Scandinavian Journal of Statistics, 6, 65–70.
Jansen, P. W., Verlinden, M., Dommisse-Van Berkel, A., Mieloo, C., Van der Ende, J., Veenstra, R., . . . Tiemeier, H. (2012). Prevalence of bullying and victimization among children in early elementary school: Do family and school neighborhood socioeconomic status matter? BMC Public Health, 12, 494.
Kokkinos, C. M., & Antoniadou, N. (2013). Bullying and victimization experiences in elementary school students nominated by their teachers for specific learning disabilities. School Psychology International, 34, 674–690.
Kovas, Y., Garon-Carrier, G., Boivin, M., Petrill, S. A., Plomin, R., Malykh, S. B., . . . Tremblay, R. (2015). Why children differ in motivation to learn: Insights from over 13,000 twins from 6 countries. Personality and Individual Differences, 80, 51–63.
Laffey-Ardley, S., & Thorpe, K. (2006). Being opposite: Is there advantage for social competence and friendships in being an opposite-sex twin? Twin Research and Human Genetics, 9, 131–140.
Lamarche, V., Brendgen, M., Boivin, M., Vitaro, F., Dionne, G., & Pérusse, D. (2007). Do friends’ characteristics moderate the prospective links between peer victimization and reactive and proactive aggression? Journal of Abnormal Child Psychology, 35, 665–680.
Lamarche, V., Brendgen, M., Boivin, M., Vitaro, F., Pérusse, D., & Dionne, G. (2006). Do friendships and sibling relationships provide protection against peer victimization in a similar way? Social Development, 15, 373–393.
Muthén, L. K., & Muthén, B. O. (1998–2012). Mplus user's guide (7th ed.). Los Angeles, CA: Muthén & Muthén.
O'Moore, M., & Kirkham, C. (2001). Self‐esteem and its relationship to bullying behaviour. Aggressive Behavior, 27, 269–283.
Oshima, N., Nishida, A., Fukushima, M., Shimodera, S., Kasai, K., Okazaki, Y., & Sasaki, T. (2010). Psychotic‐like experiences (PLEs) and mental health status in twin and singleton Japanese high school students. Early Intervention in Psychiatry, 4, 206–213.
Pellegrini, A. D., & Long, J. D. (2002). A longitudinal study of bullying, dominance, and victimization during the transition from primary school through secondary school. British Journal of Developmental Psychology, 20, 259–280.
Polderman, T. J., Bartels, M., Verhulst, F. C., Huizink, A. C., van Beijsterveldt, C. E., & Boomsma, D. I. (2010). No effect of classroom sharing on educational achievement in twins: A prospective, longitudinal cohort study. Journal of Epidemiology and Community Health, 64, 36–40.
Core Team, R. (2015). R: A language and environment for statistical computing. Vienna, Austria: R Foundation for Statistical Computing.
Rønning, J. A., Sourander, A., Kumpulainen, K., Tamminen, T., Niemelä, S., Moilanen, I., . . . Almqvist, F. (2009). Cross-informant agreement about bullying and victimization among eight-year-olds: Whose information best predicts psychiatric caseness 10–15 years later? Social Psychiatry and Psychiatric Epidemiology, 44, 15–22.
Rose, A. J., & Rudolph, K. D. (2006). A review of sex differences in peer relationship processes: Potential trade-offs for the emotional and behavioral development of girls and boys. Psychological Bulletin, 132, 98–131.
Sapouna, M. (2008). Bullying in Greek primary and secondary schools. School Psychology International, 29, 199–213.
Saudino, K. J., Ronald, A., & Plomin, R. (2005). The etiology of behavior problems in 7-year-old twins: Substantial genetic influence and negligible shared environmental influence for parent ratings and ratings by same and different teachers. Journal of Abnormal Child Psychology, 33, 113–130.
Sentse, M., Kretschmer, T., & Salmivalli, C. (2015). The Longitudinal Interplay between bullying, victimization, and social status: Age‐related and gender differences. Social Development, 24, 659–677.
Shakoor, S., McGuire, P., Cardno, A. G., Freeman, D., Plomin, R., & Ronald, A. (2015). A shared genetic propensity underlies experiences of bullying victimization in late childhood and self-rated paranoid thinking in adolescence. Schizophrenia Bulletin, 41, 754–763.
Staton, S., Thorpe, K., Thompson, C., & Danby, S. (2012). To separate or not to separate? Parental decision-making regarding the separation of twins in the early years of schooling. Journal of Early Childhood Research, 10, 196–208.
Takizawa, R., Maughan, B., & Arseneault, L. (2014). Adult health outcomes of childhood bullying victimization: Evidence from a five-decade longitudinal British birth cohort. American Journal of Psychiatry, 171, 777–784.
Tancredy, C. M., & Fraley, R. C. (2006). The nature of adult twin relationships: An attachment-theoretical perspective. Journal of Personality and Social Psychology, 90, 78–93.
Van Beijsterveldt, C. E., Groen-Blokhuis, M., Hottenga, J. J., Franić, S., Hudziak, J. J., Lamb, D., . . . Boomsma, D. I. (2013). The Young Netherlands Twin Register (YNTR): Longitudinal twin and family studies in over 70,000 children. Twin Research and Human Genetics, 16, 252–267.
Van Leeuwen, M., van den Berg, S. M., van Beijsterveldt, T. C., & Boomsma, D. I. (2005). Effects of twin separation in primary school. Twin Research and Human Genetics, 8, 384–391.
Von Marées, N., & Petermann, F. (2010). Bullying in German primary schools gender differences, age trends and influence of parents’ migration and educational backgrounds. School Psychology International, 31, 178–198.
Weissenberg, R., Landau, R., & Madgar, I. (2007). Older single mothers assisted by sperm donation and their children. Human Reproduction, 22, 2784–2791.
Williams, R. L. (2000). A note on robust variance estimation for cluster-correlated data. Biometrics, 56, 645–646.