Jennifer Freyd named the pattern in 1997 and the acronym has since escaped academia, which is unusual and useful.
DARVO: Deny, Attack, and Reverse Victim and Offender. Confronted with an accusation, the accused denies the behavior, attacks the credibility and motives of the person reporting it, and then recasts the exchange so that the accused is the injured party and the accuser is the aggressor.
The sequence is stable, and its final move is the distinctive one. Denial alone is ordinary. Attack alone is ordinary. The reversal is what makes DARVO a recognizable technique: the person who did the thing becomes the person to whom something has been done — persecuted, smeared, subjected to a witch hunt, denied due process, destroyed by a mob.
Sarah Harsey and Freyd tested whether observers are affected by it, and the results are the reason this belongs in a guide rather than a clinical text. In their experiments, participants who read an account containing DARVO rated the accused as more believable and less abusive, and the accuser as less believable and more abusive, than participants who read the same account without it. Exposure to the technique changed third-party judgment. In further work, they found that educating participants about DARVO reduced its effectiveness — one of the few countermeasures in this guide with direct experimental support.
The reason it works on observers has to do with the raw materials each side presents.
An accused person deploying DARVO is confident, articulate, and visibly indignant. Indignation is a high-energy, legible display, and observers use it as a credibility cue, because innocent people are indeed often outraged when falsely accused. A person describing something that was done to them, particularly some time afterwards, frequently presents flat, hesitant, inconsistent on peripheral details, and emotionally muted — which is a well-documented trauma presentation and reads, to an untrained observer, as a poor witness.
So the observer is comparing a strong performance of innocence with a weak performance of injury, and using the wrong variable.
For the person on the receiving end, the effect is different and worse. Freyd's betrayal trauma theory concerns harm inflicted by someone the victim depends on, where the ordinary response — withdrawal, confrontation, disclosure — is unavailable because the relationship is necessary. DARVO adds shame to that: having reported something and become the accused, most people stop reporting. Harsey and Freyd found associations between DARVO exposure and increased self-blame in victims. The technique suppresses disclosure, which is its most consequential function.
The countermeasure is structural. The reversal succeeds by moving the conversation from an evidentiary question to a contest of character, so the intervention is to refuse the move and hold the original question open in writing. What is alleged, specifically. What evidence exists for and against it. Those questions do not become easier or harder to answer depending on how anyone is behaving in the room.
And for an observer, the finding above is worth internalizing directly: your sense that the confident, wounded party must be the honest one is the mechanism operating, and knowing that reduces it.
Cross-ref: Part 11 gaslighting defense