1. Finkelhor D, Turner H, Ormrod R. Kid ’ s stuff: the nature and
impact of peer and sibling violence on younger and older children.
Child Abuse Negl 2006;30:1401 – 21.
2. Eriksen S, Jensen V. A push or a punch; distinguishing the severity
of sibling violence. J Interpers Violence 2009;24:183 – 208.
3. Bank SP, Kahn MD. The sibling bond. New York: Basic Books,
1982.
4. McHale SM, Crouter AC. The family contexts of sibling relationships.
In: Brody G, editor. Sibling relationships: their causes and
consequences. Norwood, NJ: Ablex, 1996:173 – 96.
5. Dunn JF. Sibling infl uences. In: Lewis M, Feinman S, editors.
Social infl uences and socialization in infancy. New York/London:
Plenum, 1991:97–109.
6. Dunn J. Sisters and brothers (the developing child). Cambridge,
MA: Harvard University Press, 1985.
7. Brody GH. Siblings ’ direct and indirect contributions to child
development. Curr Direct Psychol Sci 2004;13:124 – 6.
8. Cicirelli VG. Sibling relationships across the lifespan. New York:
Plenum, 1995.
9. Azmitia M, Hesser J. Why siblings are important agents of cognitive
development: a comparison of siblings and peers. Child Dev
1993;64:430 – 44.
10. Stormshak EA, Bellanti CJ, Bierman KL. The quality of
sibling relationships and the development of social competence
and behavioral control in aggressive children. Dev Psychol
1996;32:79 – 89.
11. Gass K, Jenkins J, Dunn J. Are sibling relationships protective ? A
longitudinal study. J Child Psychol Psychiatr 2007;48:167 – 75.
12. Jenkins J, Simpson A, Dunn J, Rasbash J, O ’ Connor TG. Mutual
infl uence of marital confl ict and children ’ s behavior problems:
shared and nonshared family risks. Child Dev 2005;76:24 – 39.
13. Bowes L, Maughan B, Caspi A, Moffi tt TE, Arseneault L.
Families promote emotional and behavioural resilience to bullying:
evidence of an environmental effect. J Child Psychol
Psychiatr 2010;51:809 – 17.
14. Dunn J, Herrera C. Confl ict resolution with friends, siblings,
and mothers: a developmental perspective. Aggress Behav
1997;23:343 – 57.
15. Straus MA, Gelles RJ, Steimetz S. Behind closed doors. New
York: Double-Day, 1980.
16. Goodwin MP, Roscoe B. Sibling violence and antagonistic
interactions among middle adolescents. Adolescence 1990;25:
451 – 67.
17. Ensor R, Marks A, Jacobs L, Hughes C. Trajectories of antisocial
behaviour towards siblings predict antisocial behaviour towards
peers. J Child Psychol Psychiatr 2010;51:1208 – 16.
18. Analitis F, Velderman MK, Ravens-Sieberer U, Detmar S,
Erhart M, et al. Being bullied: associated factors in children and
adolescents 8 to 18 years old in 11 European countries. Pediatrics
2009;123:569 – 77.
19. Christakis NA, Fowler JH. The spread of obesity in a large social
network over 32 years. N Engl J Med 2007;357:370 – 9.
20. Olweus D. Bullying in schools: what we know and what we can
do. Oxford: Blackwell, 1993.
21. Stassen Berger K. Update on bullying at school: science forgotten
? Dev Rev 2007;27:90 – 126.
22. Wolke D, Woods S, Stanford K, Schulz H. Bullying and victimization
of primary school children in England and Germany:
prevalence and school factors. Br J Psychol 2001;92:673 – 96.
23. Schreier A, Wolke D, Thomas K, Horwood J, Hollis C, et al.
Prospective study of peer victimization in childhood and psychotic
symptoms in a nonclinical population at age 12 years.
Arch Gen Psychiatry 2009;66:527 – 36.
24. Crick N, Ostrov J, Werner N. A longitudinal study of relational
aggression, physical aggression, and children ’ s social – psychological
adjustment. J Abnorm Child Psychol 2006;34:127 – 38.
25. Monks CP, Smith PK, Naylor P, Barter C, Ireland JL, et al.
Bullying in different contexts: commonalities, differences and
the role of theory. Aggress Violent Behav 2009;14:146 – 56.
26. Wolke D, Samara MM. Bullied by siblings: association with
peer victimisation and behaviour problems in Israeli lower
secondary school children. J Child Psychol Psychiatr 2004;45:
1015 – 29.
27. Hardy MS. Physical aggression and sexual behavior among siblings:
a retrospective study. J Fam Violence 2001;16:255 – 68.
28. Eriksen S, Jensen V. All in the family ? Family environment factors
in sibling violence. J Fam Violence 2006;21:497 – 507.
29. Duncan RD. Peer and sibling aggression: an investigation
of intra- and extra-familial bullying. J Interpers Violence
1999;14:871– 86.
30. Menesini E, Camodeca M, Nocentini A. Bullying among siblings:
the role of personality and relational variables. Br J Dev
Psychol 2010;28:921 – 39.
31. Wolke D, Skew A. Bullied at home and at school: relationship
to behaviour problems and unhappiness. In: McFall S, editor.
Understanding society: early fi ndings from the fi rst wave of the
UK ’ s household longitudinal study. London: Economic Social
Research Council, 2011, pp. 23–32.
32. Sapouna M, Wolke D, Vannini N, Watson S, Woods S, et al.
Individual and social network predictors of the short-term stability
of bullying victimization in the United Kingdom and
Germany. Br J Educ Psychol 2011 (online: DOI: 10.1111/j.2044-
8279.2011.02022.x).
33. Samara M, Smith PK. How schools tackle bullying, and the use
of whole school policies: changes over the last decade. Educ
Psychol 2008;28:663 – 76.
34. Smith PK, Morita Y, Junger-Tas J, Olweus D, Catalano R,
et al. The nature of school bullying: a cross-national perspective.
London: Routledge, 1999.
35. Whitney I, Smith PK. A survey of the nature and extent of
bullying in junior/middle and secondary schools. Educ Res
1993;35:3 – 25.
36. Aguilar B, O ’ Brien KM, August GJ, Aoun SL, Hektner JM.
Relationship quality of aggressive children and their siblings:
a multi-informant, multimeasure investigation. J Abnorm Child Psychol 2001;29:479 – 89.
37. Putallaz M. Maternal behavior and children ’ s sociometric status.
Child Dev 1987;54:417 – 26.
38. MacDonald K, Parke RE. Bridging the gap: parent-child
play interaction and peer interactive competence. Child Dev
1984;55:1265 – 77.
39. Sroufe LA, Coffi no B, Carlson EA. Conceptualizing the role of
early experience: lessons from the Minnesota longitudinal study.
Dev Rev 2010;30:36 – 51.
40. Bowlby J. Attachment and loss, vol. 1. Attachment.
Harmondsworth: Penguin, 1971.
41. Gleason TR, Gower AL, Hohmann LM, Gleason TC.
Temperament and friendship in preschool-aged children. Int J
Behav Dev 2005;29:336 – 44.
42. Rutter M. Genes and behavior: nature-nurture interplay explained.
Oxford: Blackwell, 2006.
43. Stocker C, Dunn J. Sibling relationships in childhood: links
with friendships and peer relationships. Br J Dev Psychol
1990;8:227 – 44.
44. Hawker D, Boulton M. Twenty years ’ research on peer victimization
and psychosocial maladjustment: a meta-analytic review of crosssectional
studies. J Child Psychol Psychiatr 2000;41:441 – 55.
45. Wolke D, Woods S, Bloomfi eld L, Karstadt L. The association
between direct and relational bullying and behaviour. J Child
Psychol Psychiatr 2000;41:989 – 1002.
46. Wolke D, Woods S, Bloomfi eld L, Karstadt L. Bullying involvement
in primary school and common health problems. Arch Dis
Child 2001;85:197 – 201.
47. Gini G, Pozzoli T. Association between bullying and psychosomatic
problems: a meta-analysis. Pediatrics 2009;123:1059 – 65.
48. Reijntjes A, Kamphuis JH, Prinzie P, Telch MJ. Peer victimization
and internalizing problems in children: a meta-analysis of
longitudinal studies. Child Abuse Negl 2010;34:244 – 52.
49. Arseneault L, Cannon M, Fisher HL, Polanczyk G, Moffi tt TE,
et al. Childhood trauma and children ’ s emerging psychotic symptoms:
a genetically sensitive longitudinal cohort study. Am J
Psychiatry 2011;168:65 – 72.
50. Arseneault L, Milne BJ, Taylor A, Adams F, Delgado K, et al.
Being bullied as an environmentally mediated contributing factor
to children ’ s internalizing problems: a study of twins discordant
for victimization. Arch Pediatr Adolesc Med 2008;162:
145 – 50.
51. Finkelhor D, Ormrod RK, Turner HA. Polyvictimization and
trauma in a national longitudinal cohort. Dev Psychopathol
2007;19:149 – 66.
52. Dunn J, Kendrick C. Temperamental differences, family relationships,
and young children ’ s response to change within the family.
In: Porter R, Collins GM, editors. Ciba Foundation symposium
89: temperamental differences in infants and young children.
London: Pitman Books, 1982:87 – 105.
53. Ma X. Bullying and being bullied: to what extent are bullies also
victims ? Am Educ Res J 2001;38:351 – 70.
54. Lawson DW, Mace R. Siblings and childhood mental
health: evidence for a later-born advantage. Soc Sci Med
2010;70:2061 – 9.
55. Department for Children, Schools and Families. Staying Safe
Survey 2009: young people and parents ’ attitudes around accidents,
bullying and safety. London: Department Children Schools
Families, 2009.