Adams, R. E., & Laursen, B. (2007). The correlates of conflict: Disagreement is not necessarily detrimental. Journal of Family Psychology, 21, 445–458.
Azmitia, M., & Hesser, J. (1993). Why siblings are more important agents of cognitive development: A comparison of siblings and peers. Child Development, 64, 430–444.
Bank, L., Burrastone, B., & Snyder, J. (2004). Sibling conflict and ineffective parenting as predictors of adolescent boys antisocial behaviour and peer difficulties: Additive and interactional effects. Journal of Research on Adolescence, 14, 99–125.
Bekkhus, M., Staton, S., Borge, A. I. H., & Thorpe, K. (2011). Conflict, closeness and comfort: The inter-twin relationship as a risk factor for behavioral difficulties. Twin Research and Human Genetics, 14, 444–451.
Bekkhus, M., Staton, S., Borge, A. I. H., & Thorpe, K. (2014). Do twins differ from single-born children on rates of behavioural difficulty in early childhood? A study of sibling relationship risk factors. Twin Research and Human Genetics, 17, 288–295.
Bentler, P. M., & Bonett, D. G. (1980). Significance tests and goodness of fit in the analysis of covariance structures. Psychological Bulletin, 88, 588–606.
Berndt, T. J., & Perry, T. B. (1986). Children's perception of friendships as supportive relationships. Developmental Psychology, 22, 640–648.
Boivin, M., Brendgen, M., Vitaro, F., Dionne, G., Girard, A., Pérusse, D., & Tremblay, R. E. (2013). Strong genetic contribution to peer relationship difficulties at school entry: Findings from a longitudinal twin study. Child Development, 84, 1098–1114.
Brendgen, M., Vitaro, F., Bukowski, W. M., Dionne, G., Tremblay, R. E., & Boivin, M. (2013). Can friends protect genetically vulnerable children from depression?
Development and Psychopathology, 25, 277–289.
Browne, M. W., & Cudeck, R. (1993). Alternative ways of assessing model fit. Newbury Park, CA: Sage.
Burt, S. A., & Klump, K. L. (2013). The Michigan state university twin registry (MSUTR): An update. Twin Research and Human Genetics, 16, 344–350.
Campione-Barr, N., & Smetana, J. G. (2010). ‘Who said you could wear my sweater?’ Adolescent siblings'conflicts and associations with relationship quality. Child Development, 81, 464–471.
Cassell, S. (2011). Examining the twin bond: A look at the psychological development of twins and the differences in individuality and identity differentiation between fraternal and identical same-sex twins. Unpublished manuscript, Washington, DC: American University.
Coffman, D. L., & MacCallum, R. C. (2005). Using parcels to convert path analysis models into latent variable models. Multivariate Behavioral Research, 40, 235–259.
Danby, S., & Thorpe, K. (2006). Compromised or competent: Analysing twin children's social worlds. Twin Research and Human Genetics, 9, 90–94.
DiLalla, L. F. (2006). Social development of twins. Twin Research and Human Genetics, 9, 95–102.
Doyle, A., Lawford, H., & Markiewicz, D. (2009). Attachment style with mother, father, best friend, and romantic partner during adolescence. Journal of Research on Adolescence, 19, 690–714.
Dunn, J. (1983). Sibling relationships in early childhood. Child Development, 54, 787–811.
Dunn, J. (2006). Children's friendships. The beginnings of intimacy. London, UK: Blackwell Publishing.
Dunn, J., & McGuire, S. (1992). Sibling and peer relationships in childhood. Journal of Child Psychology and Psychiatry, 33, 67–105.
Dunn, J., Slomkowski, C., Bcardsall, L., & Rende, R. (1994), Adjustment in middle childhood and early adolescence: Links with earlier and contemporary sibling relationships. Journal of Child Psychology and Psychiatry, 35, 491–504.
Fortuna, K., Goldner, I., & Knafo, A. (2010). Twin relationships: A comparison across monozygotic twins, dizygotic twins and nontwin siblings in early childhood. Family Science, 1, 205–211.
Furman, W. (1996). The measurement of friendship perceptions: Conceptual and methodological issues. In Bukowski, W. M., Newcomp, A. F., & Hartup, W. W. (Eds.), The company they keep (pp. 41–65). New York: Cambridge University Press.
Furman, W., & Buhrmester, D. (1985). Children's perceptions of the personal relationships in their social networks. Developmental Psychology, 21, 1016–1024.
Furman, W., & Rose, A. (2015). Friendships, romantic relationships, and other dyadic peer relationships in childhood and adolescence: A unified relational perspective. In Lerner, R., Lamb, M. E., & Coll, C. G. (Eds.), The handbook of child psychology and developmental science (7th ed.), vol. 3, Social and emotional development. Hoboken, NJ: John Wiley & Sons.
Garcia, M. M., Shaw, D. S., Winslow, E. B., & Yaggi, K. E. (2000). Destructive sibling conflict and the development of conduct problems in young boys. Developmental Psychology, 36, 44–53.
Gass, K., Jenkins, J., & Dunn, J. (2007). Are sibling relationships protective? A longitudinal study. Journal of Child Psychology and Psychiatry, 48, 167–175.
Goldsmith, H. (1991). A zygosity questionnaire for young twins: A research note. Behavior Genetics, 21, 257–269.
Hay, D. A., & Preedy, P. (2006). Meeting the educational needs of multiple birth children. Early Human Development, 82, 397–403.
Jackson, Y., & Warren, J. S. (2000). Family, school, and community appraisal, social support, and life events: Predicting outcome behavior in school-age children. Child Development, 71, 1441–1457.
Jenkins, J. M., & Smith, M. A. (1990). Factors protecting children living in disharmonious homes: Maternal reports. Journal of the American Academy of Child & Adolescent Psychiatry, 29, 60–69.
Koch, H. L. (1966). Twins and twin relations. Chicago: University of Chicago Press.
Ladd, G. W. (1983). Social networks of popular, average and rejected children in school settings. Merrill-Palmer Quartely, 29, 283–307.
Lamarche, V., Brendgen, M., Boivin, M., Vitaro, F., Pérusse, D., & Dionne, G. (2006). Do friendship and sibling relationships provide protection against peer victimization in a similar way?
Social Development, 15, 373–393.
Little, T. D., Cunningham, W. A., Shahar, G., & Widaman, K. F. (2002). To parcel or not to parcel: Exploring the question, weighing the merits. Structural Equation Modeling, 9, 151–173.
Liu, Y.-L. (2008). An examination of three models of the relationships between parental attachments and adolescents’ social functioning and depressive symptoms. Journal of Youth and Adolescence, 37, 941–952.
Lockwood, R. L., Kitzmann, K. M., & Cohen, R. (2001). The impact of sibling warmth and conflict on children's social competence with peers. Child Study Journal, 31, 47–69.
McCoy, J. K., Brody, G. H., & Stoneman, Z. (1994). Longitudinal analyses of sibling relationships as mediators of the link between family processes and youths’ best friendships. Family Relations, 43, 400–408.
McGuire, S., & Segal, N. L. (2013). Peer network overlap in twin, sibling and friend dyads. Child Development, 84, 500–511.
Magnusson, P. K., Almqvist, C., Rahman, I., Ganna, A., Viktorin, A., Walum, H., ... Lichtenstein, P. (2013). The Swedish twin registry: Establishment of a biobank and other recent developments. Twin Research and Human Genetics, 16, 317–329.
Martin, J. A., Hamilton, B. E., & Osterman, J. K. (2012). Three decades of twin births in the United States 1980–2009. NCHS Data Brief, 80.
Modry-Mandell, K., Gamble, W., & Taylor, A. (2007). Family emotional climate and sibling relationship quality: Influences on behavioral problems and adaptation in preschool-aged children. Journal of Child and Family Studies, 16, 59–71.
Moilanen, I., Linna, S., Ebeling, H., Kumpulainen, K., Tamminen, T., Piha, J., & Almqvist, F. (1999). Are twins’ behavioural/emotional problems different from singletons?
European Child & Adolescent Psychiatry, 8, 62–67.
Muthén, L. K., & Muthén, B. O. (2007). Mplus user's guide (5th ed.). Los Angeles: Muthén & Muthén.
Nozaki, M., Fujisawa, K. K., Ando, J., & Hasegawa, T. (2012). The effects of sibling relationships on social adjustment among Japanese twins compared with singletons. Twin Research and Human Genetics, 15, 727–736.
Patterson, G. R. (1984). Siblings: Fellow travelers in coercive family processes. Advances in the Study of Aggression, 1, 173–214.
Price, J. M. (1996). Friendships of maltreated children and adolescents: Contexts for expressing and modifying relationship history. In Bukowski, W. M., Newkomb, A. F., & Hartup, W. W. (Eds.), The company they keep: Friendship in childhood and adolescence. (pp. 262–285). Cambridge, UK: Cambridge University Press.
Satorra, A. (2000). Scaled and adjusted restricted tests in multi-sample analysis of moment structures. In Heijmans, R. D. H., Pollock, D. S. G., & Satorra, A. (Eds.), Innovations in multivariate statistical analysis. A Festschrift for Heinz Neudecker (pp. 233–247). London: Kluwer Academic Publishers.
Segal, L. N., McGuire, S. A., Miller, S. A., & Havlena, J. (2008). Tacit coordination in monozygotic twins, dizygotic twins and virtual twins: Effects and implications of genetic relatedness. Personality and Individual Differences, 45, 607–612.
Spitz, E., Moutier, R., Reed, T., Busnel, M. C., Marchaland, C., Roubertoux, P. L., & Carlier, M. (1996). Comparative diagnoses of twin zygosity by SSLP variant analysis, questionnaire, and dermatoglyphic analysis. Behavior Genetics, 26, 55–63.
Stice, E., Ragan, J., & Randall, P. (2004). Prospective relations between social support and depression: Differential direction of effects for parent and peer support?
Journal of Abnormal Psychology, 113, 155–159.
Stocker, C. M. (1994). Children's perceptions of relationships with siblings, friends, and mothers: Compensatory processes and links with adjustment. Journal of Child Psychology and Psychiatry, 35, 1447–1459.
Stocker, C., & Dunn, J. (1990). Sibling relationships in childhood: Links with friendships and peer relationships. British Journal of Developmental Psychology, 8, 227–244.
Stormshak, E. A., Bellanti, C. J., & Bierman, K. L. (1996). The quality of sibling relationships and the development of social competence and behavioral control in aggressive children. Developmental Psychology, 32, 79–89.
Sullivan, H. S. (1953). An interpersonal theory of psychiatry. New York: Norton.
Thorpe, K. (2003). Twins and friendship. Twin Research and Human Genetics, 6, 532–535.
Thorpe, K., & Danby, S. (2006). Compromised or competent: Analysing twin children's social worlds. Twin Research and Human Genetics, 9, 90–94.
Thorpe, K., & Gardner, K. (2006). Twins and their friendships: differences between monozygotic, dizygotic same-sex and dizygotic mixed-sex pairs. Twin Research and Human Genetics, 9, 155–164.
Williams, R. L. (2000). A note on robust variance estimation for cluster-correlated data. Biometrics, 56, 645–646.
Zahn-Waxler, C., Robinson, J. L., & Emde, R. N. (1992). The development of empathy in twins. Developmental Psychopathology, 28, 1038–1047.