A very nice summary about Dyadic Developmental Psychotherapy, which is an evidence-based and effective treatment for trauma and attachment disorders can be found at
http://psychology.wikia.com/wiki/Dyadic_Developmental_Psychotherapy

While most Wiki's, especially Wikipedia, are not reliable sources of information since articles and subjects can be taken over by zealots with one or another bias or ax to grind, the Psychology wiki encourages people to register and use their real professional identity and the articles are pretty well vetted.