This is a Lexicon entry: the mechanism, when it shows up, and the countermeasure. The full correction, with real-world cases and the audit prompt, hasn't been written yet.
Definition
The compulsive, repetitive, passive dwelling on negative experiences, feelings or problems without progressing toward resolution or active coping. Unlike productive reflection - which moves toward insight, action or acceptance - toxic rumination circulates the same distressing content in loops while steadily amplifying negative affect and depressive symptomatology. It is one of the most reliable predictors of depression onset. The key distinction: reflection produces movement; rumination produces only more rumination.
When it shows up
When you have been thinking about the same problem or event for more than 30 minutes without generating new insight or reaching a decision.
Failure mode
Amplifying negative emotion through repetition. Mistaking mental activity for productive processing. The loop that feels like it is solving the problem while actually deepening it.
Countermeasure
Set a time limit for reflection on any single problem. Ask: "Have I had a new thought about this in the last ten minutes?" If not, interrupt the loop with physical activity or deliberate distraction.
Related concepts
Also connected in the mapThe Zeigarnik Effect·Alexithymia·Learned Helplessness·The Sapolsky Stress Model
Origin
Also revealed
Entry #627 of 631 in The Lexicon · see the full Lexicon