Mirror Stage Theory, also called Narcissistic Mirror Stage: Mirror stage theory — developed in the 1930s by French psychoanalyst/intellectual Jacques Lacan (1901-1981), building on Freud’s ego-ideal — suggests the six-month old develops ego through fascination with their reflection. By 15-18 months, they gradually recognize it as their own body. Lacan linked this stage to developing narcissism, often involving aggression, as the child experiences both attraction and rejection from the image. He called this dual relationship between the self and its image “misrecognizing” an illusion for the “fragmented infant” to identify with. The infant is “fragmented” because its bodily experience is one of disconnected parts, lacking motor control and coherence. The child finds the contrast alienating, because they identify with this idealized external image, rather than its internal, uncoordinated reality. According to Lacanian theory, a mismatch between internal fragmentation and the external ideal is what forms the ego and is the basis for narcissism. It begins a lifelong pursuit of a wholeness that’s never fully achieved. Lacan viewed the mirror stage as a fundamental, permanent aspect of our subjectivity and ego-formation, but as a transitional stage. Individuals must be integrated into the Symbolic Order — and “filtered” through language and the external world’s social rules and cultural norms to create a viable social subject. Key aspects of the mirror stage:

• Pre-mirror infant experience when the child doesn’t experience its body as whole but as fragmented.
• Recognition and identification when the child sees its reflection, being fascinated by this stable, whole image and recognizing itself.
• Misrecognition of this image as true, instead of the fragmented reality of the infant’s body. The reflection is an outside, alien image the infant wrongly assumes is the complete self.
• Formation of the ego takes place in this moment of misrecognition: It’s built on this stable, but illusory, self-image.
• Sense of wholeness in the mirror stage: The child gains a sense of completeness and mastery over self through the external image, contrasting with the lack of motor control over its own body.
• Alienation by identifying with an external image: The child becomes estranged from its own fragmented experience of self.
• Entry into the Imaginary Order: The developing child is introduced into a realm of images and identifications that shapes the developing self.
• Entry into the Symbolic Order: The mirror stage is foundational to the ego, which is then structured and governed by an overarching system of language and social law into which every human is born.