Recent theoretical advances in the concept of object constancy have placed it in the context of the child's establishing a separate identity. Although these advances were partly the result of examining the child's growing abilities to evoke a mental image of the absent mother, constancy cannot be well understood as a type of mental representation. It more resembles an illusion, specifically the illusion that the mother is constantly available in her mirroring function. The child's sense of his or her own reality is born in the mother's affectively attuned mirroring, as nothing about the child is real for the child until first seen by the mother. The illusion of the constant object allows the child to construct a sense of his or her own separate reality.