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Within homelessness services recent policy developments have highlighted the need for integration and improved collaborative working and also, the need for 'Psychologically Informed Environments' (PIES) in which workers are better equipped to manage the 'complex trauma' associated with homelessness. Drawing on the findings of an evaluation of a multi-site development programme, this paper demonstrates how both these policy aspirations might be implemented through a single delivery vehicle (a community of practice). The paper describes how organizational, educational and psychosocial theory was used to inform programme design and reflects on the utility of these approaches in the light of the evaluation findings. It is reported that communities of practice can deliver significant performance gains in terms of building collaborative relationships and opening-up opportunities for interprofessional education and learning. Filling an important knowledge gap, it also suggested how (professional) participation in a community of practice might work to improve outcomes for service users. Most likely we see those outcomes as being linked to tackling exclusion by sustaining the workforce itself, that is in motivating workers to remain engaged and thinking positively in what is an emotionally challenging and stressful job role. [ABSTRACT FROM AUTHOR]

The current definition of a traumatic event in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM–5; American Psychiatric Association, 2013) may be too narrow to describe the myriad of difficult childhood experiences. Furthermore, youth may develop a distinct pattern of symptoms in relation to complex or multiple childhood trauma experiences, the proposed developmental trauma disorder (DTD; B. A. van der Kolk, 2005) We developed and utilized a new measure, the Potentially Traumatic Experiences Questionnaire (PTEQ), to assess patterns in childhood trauma exposure. We used 2 item formats (open ended vs. closed ended) in order to explore potential differences in reporting. Furthermore, we assessed for symptoms associated with DTD following exposure to complex childhood trauma in a sample of adolescents. Participants were 186 adolescents ages 18 and 19 years old who were asked to report retrospectively on their difficult childhood experiences. The results showed that participants reported multiple events that would not be considered traumatic according to DSM–5 Posttraumatic Stress Disorder Criterion A, and those who completed the PTEQ with closed-ended items reported more differentiated trauma types than participants who completed the open-ended questionnaire. Also, participants who reported multiple or chronic events were more likely to endorse symptoms associated with DTD. This study has implications for the diagnosis and treatment of complex trauma experiences in youth. [ABSTRACT FROM AUTHOR]