3 Signs of Deep Commitment in a Relationship

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When most people think about what commitment looks like in a relationship, they picture the landmark moments like the first “I love you,” moving in together, or staying together through a rough patch. These moments might feel like evidence of something real in a relationship.

But psychologists who study romantic relationships have found something more interesting. The most reliable signals of deep commitment aren’t the dramatic gestures; they’re specific, often invisible habits that deeply committed partners display almost automatically. And in an era when alternatives are everywhere, and attention is thin, understanding these habits matters more than ever.

Here are three such habits that research talks about.

1. They Don’t Notice Attractive Alternatives

Something that surprises most people when they first hear it is that deeply committed partners don’t just choose not to pursue other attractive people. They actually perceive them as less attractive in the first place. This phenomenon, known in relationship science as the “derogation of alternatives,” has been documented over decades of research, but the neuroimaging findings are what make it truly striking.

According to a 2023 brain imaging study in the European Journal of Personality, when romantically committed individuals successfully tuned out attractive alternatives, this corresponded with increased activation in the ventrolateral prefrontal cortex, a region associated with........

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