Introduction Disability is in most cases a life threatening situation that is not within the control of individuals and families. It is a condition of restriction or not being able to fulfil the roles expected of an individual depending on the age, gender, social and cultural factors. 1 Deteriorations in family functions may be observed in families with children with a disability and this may also deeply affect the sibling who demonstrates normal development. 2,3 Variables such as family traits, parent- child relations, parents' attitudes towards their special child and expectations from the normal child and characteristics of that child can affect the adaptability to siblings with a disability and emotional/behavioural reactions may appear. Thus, relations between siblings may be affected directly or indirectly. 4-6 These factors that cause changes in siblings' lives may lead to emotional and behavioural difficulties and may stand as problems in their relations. 7-9 Sibling relations are of significance in a family, the social and emotional environment in which a child grows and develops, not only in terms of the harmony and sociability between children with disabilities and their normally developing siblings but also in terms of the sustainability of family functionality. 9 A child lives his/her first social experiences with the sibling and they are the people with whom the child takes first steps towards socialisation. Socialisation is the period in which the child adapts to social norms and situations. 10,11 As a child can achieve socialisation with his/her sibling, but peers also contribute to this development positively or negatively when the child is an only child. 12,13 The child learns to express feelings and develops conflict-solving skills. 14,15 In the natural game environment, the playing child improves problem-solving skills using the brain capacity. Children without a disability share common interests with a sibling(s) via games and often include the sibling with special needs in the game. For healthy children without a disability, playing with siblings who have a disability and including them in their activities is a need as well. 16-18 Relations between siblings comprise a system in which various trials and errors are made. It is a system that affects prospective social relations, coping strategies and personality growth. 6,19 Thanks to this relationship between siblings, which will last a lifetime, siblings utilise the strength and ability they obtain in other social relations. While healthy children who have siblings with a disability try to understand why their siblings are different on the one hand, on the other they may think they face more responsibilities compared to other individuals of their age and they may also feel that they receive less attention from their parents. 5,18 Thus, apart from the difficulties families experience due to having a child with a disability, problematic behaviours occur between children with and without disabilities. For J Pak Med Assoc 400 RESEARCH ARTICLE The influence on group games on the relationship between children with disabilities and their healthy siblings: An experimental study Meltem Kurtuncu, 1 Nurten Arslan 2 Abstract Objective: To investigate the impact of group game activities among children with disabilities and their siblings. Method: This case-control study was conducted between July and September, 2015, at a rehabilitation centre in Zonguldak province, Turkey. The experimental group comprised children having disabilities, while the control group had healthy siblings and their mothers. The children were directed to play various games with their siblings over a period of four weeks, after which the instruments were administered once again. The groups were compared using Schaeffer Sibling Behaviour Rating Scale-Sibling's Form. SPSS 21 was used to analyse the data. Results: There were eight children each in the two groups with a mean age of 8.50±2.07 years in the experimental group and 8.37±2.32 years in the control group. A significant difference between the experimental (5.62±2.55) and control group (3.12±0.35) was only found in the sub-scale of physical aggression (p<0.05). Conclusion: The group activities had a positive effect on the children. Keywords: Children with disabilities, Group activities, Sibling relation. (JPMA 68: 400; 2018) Department of Paediatric Nursing, 1 Bulent Ecevit University Zonguldak School of Nursing, Zonguldak, 2 Ataturk State of Hospital, Zonguldak, Turkey. Correspondence: Meltem Kurtuncu. Email: meltemipekkurtuncu@gmail.com