I do a lot of work with children who have attachment disorders. Relationship-based psychotherapy approaches and intensive family treatment are what works best with these kids/families. Psychodynamic, cognitive-behavioral, and systems work all seem to be more effective than any of the control-based "therapies" out there. Add EMDR, expressive (art/sand tray work), and somatic-based interventions, which all increase the likelihood of these kids getting better. There are some children who are so far gone that treatment, even intensive treatment, does not seem to work.
All of the kids I work with have abuse/neglect in their backgrounds, which has caused the defect in their ability to build secure relationships with others. These kids don't trust anyone, for good reason, and the time spent building rapport with these kids can seem like an eternity. Safety is a key issue and they will test the clinician and the parents (foster or adoptive) incessantly to see if they are trustworthy adults. If clinicians who are well trained in the treatment of attachment disorders can intervene early, say before age 10, and the child/children are placed in a home environment that is capable of meeting the emotional needs of these kids (whether long term foster or adoptive placement) in a healthy way, these kids do make good progress. The trick is finding parents who are willing to put in the time and energy needed to work with these types of kids.
It can be exhausting for the parents, both emotionally/psychologically and physically. What I have noticed is that parents (foster or adoptive) who are completely burned out will turn to the more unusual, and sometimes dangerous, techniques out there being touted as "appropriate" treatment for AD as a way to exert control over these kids because they feel so out of control themselves. I've never seen it be effective on a long term basis and it also serves to re-traumatize the client. It doesn't make much sense to me to find ways to manipulate and control a child, which often triggers emotional reactions of fear/rejection/shame, as a way to force them to accept rules. And to me it does nothing to build a secure relationship as the dynamics are similiar to the abusive relationship the child had with his/her parents.
I also work with some adults who were abused as children, some of which continue that pattern of interaction into adulthood. Adults with antisocial and borderline (narcissistic as well) personality disorders are adult forms of attachment disorders.
I'm not aware of any labs or research-based activities, aside from some research being done by those following Ainsworthy's work, though I wish I did.