When somebody manages a partner through anger, it is worth asking what the control is guarding. Very often the answer is a fear of being left.

What the research says

A meta-analysis found that insecure attachment related to depression largely through processes in between, such as self-criticism and unhelpful ways of handling emotion, rather than directly. Fear about closeness does its damage through what people do with it, which is where the work has to go. The pooled studies were mostly measured at one time point, so the ordering of those steps is inferred.

Strength of evidence: one line of research. A single study, or a theoretical account.