Publication information Journal of Adolescence, 35 (4): 941-958Publisher Elsevier Item record/more information http://hdl.handle.net/10197/5155 Publisher's statementThis is the author's version of a work that was accepted for publication in Journal of Adolescence. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. AbstractThis systematic review investigated the relationship between peer and/or friend variables and physical activity among adolescents by synthesising cross-sectional, longitudinal, and experimental research conducted in the US. Seven electronic databases were searched to identify related articles published within the last 10 years and the articles reviewed included adolescents between 10 and 18 years. Studies reporting a measure of physical activity for adolescents and at least one potential peer and/or friend variable were included. Research demonstrated that peers and friends have an important role to play in the physical activity behavior of adolescents. Six processes were identified through which peers and/or friends may have an influence on physical activity including: peer and/or friend support, presence of peers and friends during physical activity, peer norms, friendship sport quality and acceptance, peer crowd affiliation, and peer victimization. The theoretical significance of these results is assessed and the development of peer-related physical activity programmes for adolescents is discussed.

The authors report on a study addressing gaps in the literature regarding parents' experiences of team-based approaches for their children with disabilities in practice in early intervention services. Specifically, this study examined the facilitators and barriers of the multidisciplinary and transdisciplinary models through a qualitative, grounded theory approach employed in which semistructured interviews and focus group discussions were conducted with 19 parents (15 mothers and four fathers from 18 families) of children with disabilities from two early intervention services in Ireland. The results revealed that both models contained clientcentered values for parents, such as enabling a child/family-centered model and facilitating parent empowerment. Also, parents reported a range of obstacles, which included misuse of time, inefficient delivery of services, lack of support, and their sense of confusion shifting from one model to another. The delivery of a key working system was also seen as worthwhile by parents. The authors concluded that parents placed the highest value on team guidance and teams' ability to promote optimal development for children. The authors note that their findings suggest that considerable gaps remain between policy and service provision in early intervention services in the Republic of Ireland regarding implementation of best practice team models for children with disabilities and their families.

PurposeActs of violent extremism have become more regular in the past decade. Little research has managed to analyse the interplay between the individuals who have carried out these acts and those who have experienced them. By bringing two such groups together in direct contact with each other, The Summit Against Violent Extremism (SAVE) offered a unique opportunity to explore the experiences of former violent extremists and victims of terrorist acts. This article aims to focus on this initiative.Design/methodology/approachThe article is designed to take the reader through the discussions of three senior psychologists who attended SAVE to offer support to all involved. Their experiences and insights were gathered, within a focus group, to develop themes with the aim to discuss and share.FindingsPsychologists outlined social development, self‐identity, family and peer groups as critical to the development of extremist views and to the de‐radicalisation of such views. It was reported that the summit gave survivors a chance to express their anger in a positive setting but that this setting could be improved for future summits. Challenges that faced the psychologists included the multi‐lingual environment and confidentiality issues.Practical implicationsThe summit was seen as a successful means for developing an understanding of those who have taken part in acts of extreme violence and terror. The psychologists provide practical suggestions for future de‐radicalisation of people in extremist groups.Originality/valueThe role of therapeutic psychologists in such a summit was viewed as critically important as a support to both formers and survivors.

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