The quick version: I am in a custody battle for my 1 year old daughter. The mother and I were not together when the baby was born. I have been supportive and 100% involved with the baby since we found out she was pregnant, but the mother wants sole custody.

I need help finding studies or anything that supports it is in the best interest of the child to have both her mother and father actively in their lives. Specifically if there are studies that show 50/50 physical custody is in the best interest for the child.

I have mediation scheduled in 2 months and want to be prepared to have scientific evidence that having joint physical custody is in the best interest for my daughter. Any help is much appreciated.