This thesis is dedicated to my sister-in-law Eva who passed away. I miss you. I am grateful to my parents Gerd and Arne, and my siblings Gro and Hans Jørgen. You were in different ways all supporting although it is likely you never grasped what I was actually doing in the field of research. A special thanks to my husband Jon who has supported me along the way. I am grateful to University of Oslo (UiO) and Vestfold Hospital Trust (Sykehuset i Vestfold) for funding and support. A special thanks to Research Unit, Division of Mental Health (KPR) and Department of Child and Adolescent Psychiatry (BUPA) in Vestfold. Thanks to everyone I met at Vinderen (Adult Psychiatry Unit) and especially those who attended the interrater reliability-sessions. You were a group of open-minded, humorous, professional and welcoming researchers and collaborators eager to discuss clinical material. I am also most grateful to my supervisors; Randi Ulberg, Hanne-Sofie Johnsen Dahl and Per Høglend. Randi, I still cannot understand how you can literally be available 24/7 for support, assistance and guidance-always with a smile. Thanks again to everyone involved in FEST and FEST-IT, including the almost 200 patients. Last, but by no means least, to my children Fredrik, Erik and Mari. You keep teaching me the importance of relationships and illustrate the everyday ups and downs that make everyone's life unique in experience, process-and change.