What does research say is most important for relationship success?

Top predictors: attachment security (feeling safe), conflict resolution skills (ability to repair after fighting), shared values (aligned life goals), and respect (genuinely liking your partner). Personality similarity ranks much lower than compatibility frameworks suggest. Relationship success is behavioral, not typological.

Which personality factors actually predict relationship success?

Openness to experience (willingness to adapt), low neuroticism (emotional stability), and agreeableness (cooperative) correlate with relationship satisfaction. But these matter less than attachment style and communication skills. You can be an anxious INFP and have a fantastic relationship with secure attachment and good communication.

Are personality compatibility tests scientifically validated?

Most popular tests (MBTI, Love Languages, Enneagram) lack rigorous validation for predicting relationship success. They're useful for self-awareness, not prediction. Tests that ARE research-validated (Big Five, Gottman assessments) are less popular because they're less fun—they measure real predictors, not type matching.

ScienceBig Five MBTI

The Science of Compatibility: What Research Actually Shows

|April 19, 2026|11 min read

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References

John Gottman (2011). What Makes Love Last: How to Build Trust and Avoid Betrayal
Sue Johnson (2019). Attachment and Relationship Satisfaction Research
Janis Spring (2012). Personality Factors and Marital Quality

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The Science of Compatibility: What Research Actually Shows

References

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