# Why Compatibility Doesn't Last: The Real Secret to Couples

> The hidden factor that keeps couples thriving long after initial compatibility fades.
- Title: Why Compatibility Doesn't Last: The Real Secret to Couples
- Summary: The hidden factor that keeps couples thriving long after initial compatibility fades. Couples need ongoing adjustment of commitment, not just shared values…
- Keywords: mark travers, calibration of engagement, self determination theory, bmc psychology, relationship maintenance, engagement control, relationship health, Compatibility, Doesn't, Last, Real, Secret
- Source: Psychologies — https://psychologies.com/couple/vie-de-couple/Mark-Travers-psychologue-ce-nest-pas-forcement-la-compatibilite-qui-fait-durer-un-couple-mais-plutot-ce-facteur-633140
- Author: Guillaume Servant
- Published: 2026-09-20T20:06:33+00:00
- Read time: 1 min
- Topics: mark travers, calibration of engagement, self determination theory, bmc psychology, relationship maintenance, engagement control, relationship health
## Compatibility Fails Over Time
Initial compatibility like shared hobbies or lifestyles doesn't predict long-term relationship success.
## The Real Factor: Commitment Calibration
Psychologists say couples thrive through continuous adjustment of commitment, not just initial compatibility.
## Motivation Matters More
Research shows commitment quality, not just shared values, predicts relationship longevity.
## Autonomous vs Controlled Motivation
Autonomous motivation keeps couples growing while controlled motivation leads to stagnation.
## Calibration in Action
Couples maintain relationships through regular checks on commitment and emotional security.
## Self-Check Questions
Ask if you'd stay in the relationship without material constraints or if fear of loss drives your choice.
## Key takeaway

Couples need ongoing adjustment of commitment, not just shared values at the start.