Introjection
In an influential article "Some Clinical Consequences of Introjection: Gaslighting", the authors argue that gaslighting involves the projection and introjection of psychic conflicts from the perpetrator to the victim: 'this imposition is based on a very special kind of "transfer"...of painful and potentially painful mental conflicts'.
They explore a variety of reasons why the victims may have 'a tendency to incorporate and assimilate what others externalize and project onto them', and conclude that gaslighting can be 'a very complex, highly structured configuration which encompasses contributions from many elements of the psychic apparatus'.
Read more about this topic: Gaslighting