Splitting: Black-and-White Thinking in a Relationship

Splitting, sometimes called black-and-white or all-or-nothing thinking, is a pattern where someone, or a relationship, gets perceived as entirely good or entirely bad, with little room for the normal, mixed reality in between. Psychology Today’s coverage of this pattern describes it as a way of simplifying difficult feelings by avoiding the discomfort of ambiguity.

How It Shows Up in a Relationship

You might be idealized completely one week, the best thing that’s ever happened to them, and devalued completely the next, suddenly framed as the source of every problem. This isn’t really about anything you did differently; it reflects an internal, often rigid way of processing people as wholly one thing or the other.

Why This Makes the Relationship Feel So Unstable

If you’re never quite sure which version of you, the idealized one or the devalued one, is about to be the one that’s “true” that day, the unpredictability itself becomes exhausting, often more than any single incident.

Related Patterns

This connects closely to Idealization in Relationships and Devaluation in Relationships, which describe the two poles this pattern swings between.