The Eco-Social Trauma Intervention Model.

Objectives: We describe a transdisciplinary theory of change for interventions to promote trauma recovery that utilizes an eco-social approach to enhance health status and well-being following trauma exposures. This four-level theory of change could be applied to other population health problems, as well.

Methods: This theory-development process included reviewing existing literature, identifying assumptions, defining core concepts, stating propositions, depicting concepts and propositions for clarity, and illustrating with case examples grounded in our focus on trauma.

Variations in Adolescent Purpose in Life and Their Association With Lifetime Substance Use.

Purpose in life (PIL) promotes positive development and is associated with decreased substance use. However, to our knowledge, researchers have not investigated how different categories of PIL are associated with substance use behavior among youth. Therefore, we sought to explore categories of PIL and how they are related to substance use in a sample of adolescents.