Six-Year Longitudinal Study From Michigan State University Deconstructs Traditional Myths Regarding Narcissism and Romantic Stability

Michigan State University study finds narcissistic rivalry lowers relationship satisfaction, but narcissistic admiration has no negative effect over six years.

By: AXL Media

Published: Apr 6, 2026, 4:19 AM EDT

Source: Information for this report was sourced from Michigan State University

Challenging the Narrative of Relationship Decay

A comprehensive longitudinal study from Michigan State University has provided a more nuanced perspective on how narcissistic traits influence long-term romantic partnerships. For years, the prevailing psychological assumption has been that narcissists are initially charming but inevitably damage their relationships over time. However, after tracking thousands of couples for up to six years, lead author Gwendolyn Seidman and her team found that the reality of these domestic dynamics is far more complex than the popular "burnout" narrative suggests.

The Dual Dimensions of the Narcissistic Persona

The research identifies two distinct methods narcissists use to maintain an inflated sense of self-worth: narcissistic admiration and narcissistic rivalry. According to Seidman, narcissistic admiration involves an individual "puffing themselves up" to impress others, whereas narcissistic rivalry involves devaluing others to assert superiority. The study, published in the Journal of Personality, found that only the latter—the tendency to put others down—was consistently linked to lower satisfaction for both partners in a relationship.

Surprisingly Stable Rates of Satisfaction Decline

One of the study's most significant findings is that the rate of satisfaction decline in relationships with a narcissistic partner is no steeper than in those without. While it is common for relationship satisfaction to decrease over time for most couples, the presence of a high-scoring narcissistic partner did not accelerate this process. This suggests that the long-term impact of these personality traits may unfold through subtle interpersonal shifts rather than a dramatic or rapid collapse of the partnership’s foundation.