Abstract
Background
The feasibility of implementation is insufficiently considered in clinical guideline development, leading to human and financial resource wastage.
Aims
To develop (a) an empirically based standardised measure of the feasibility of complex interventions for use within mental health services and (b) reporting guidelines to facilitate feasibility assessment.
Method

Millions of children each year are exposed to acute events that affect one individual or family at a time (e.g., car accidents, residential fire, street violence, sudden medical events) (Langeland & Olff, 2008). Less frequent, but with major impact, are terror attacks. Across the world, terrorist groups, single actor terrorists, and perpetrators of school shootings have attacked groups of children and youth in spaces thought to provide safety.

The efficacy of psychotherapeutic approaches in the treatment of posttraumatic stress disorder (PTSD) can be regarded as empirically demonstrated. Overall, effect sizes appear to be higher for psychotherapy than for medication. Many well-controlled trials with a mixed variety of trauma survivors have demonstrated that trauma-focused cognitive-behavioral therapy (TF-CBT) is effective in treating PTSD. Prolonged exposure therapy (PE) is currently seen as the treatment with the strongest evidence for its efficacy.