the ability to develop object constancy and have accurate, undistorted mental representations of others is an important developmental task that not everyone is able to accomplish. Mahler sought to understand the source of these distortions and the relationship between developmental arrest and object constancy.
This passage defines object constancy as the developmental capacity to sustain accurate internal representations of others, frames its failure as the central problematic of Mahler’s object-relations theory, and links developmental arrest in this domain to clinical pathology.
, Group Psychotherapy with Addicted Populations An, 1997thesis