Gaslighting is a form of psychological manipulation where someone tries to make you doubt your own memory, your judgement, and even your grip on reality, usually so they can gain power or control over you. It is slow, it is subtle, and it is most often associated with narcissists, sociopaths and psychopaths, and other highly manipulative people.
The term comes from a 1930s play, later made into a film, in which a husband slowly convinces his wife that her memory and perceptions are faulty, even that she is losing her sanity, in order to cover up a crime. In psychology, it has been used since the 1960s to describe a persistent effort to destabilise someone and make their version of events seem illegitimate. You will sometimes hear it applied to politicians or governments who muddy the truth to hide their own actions, but it does the most damage up close, in relationships.
What is gaslighting?
At its core, gaslighting is a covert attempt to influence another person for your own gain by getting them to question what they know to be true.
It shows up most often in abusive relationships. The person doing it will deny having said or done something so persistently, and with such conviction, that their partner starts to doubt themselves. From there it can escalate, until the person being manipulated begins to accept blame for things they have no memory of. It often starts small, as a way of covering up something specific such as an affair, and gradually spreads to touch every part of the relationship.
It is not limited to couples. Within families it happens between partners, and between parents and children, where one person insists that events did not happen the way everyone else remembers, again with enough conviction that the other person starts to wonder if they are the one who is confused.
Part of what makes gaslighting so hard to spot is that it often does not look like abuse. It can be a single, subtle comment, or not even a comment at all. In over twenty years of practice I have seen this again and again. One woman I worked with described how her partner said almost nothing when she ordered white wine with a steak. It was the look he gave her, as if she had made an absurd mistake, that did the work. She went home that night and searched online for whether it was acceptable to order white wine with red meat. Nothing was shouted and nothing was obviously cruel, and yet she had been quietly taught to distrust her own judgement. That is gaslighting in miniature.
What does gaslighting do to someone over time?
The damage is cumulative. Once you start to doubt your own memory, and eventually your own sanity, you become more and more dependent on the person doing the manipulating. They can then use that lowered self-esteem to control you more easily. As your confidence drops, you start to accept worse and worse treatment, because somewhere along the line you have been convinced you deserve less love, care and respect.
I have seen how far that dependence can go. One woman I worked with realised, only after she had left, that her partner had been quietly taking money from her purse for years. While she was still in the relationship she had preferred to doubt her own memory, telling herself she must have miscounted or mislaid it, because believing the alternative was too painful and she needed the relationship to work. It was only from a safe distance that she could see what had really been happening.
This is part of why it can be so hard to leave. When someone is financially or physically dependent on their partner, they are especially vulnerable, and may have very few options to step away early, before things escalate. Historically, this is one reason more women have tended to be on the receiving end.
A study published in 2023, which looked closely at people who had experienced gaslighting in their relationships, found that it usually is not a series of one-off incidents. It tends to be a mix of affection and cruelty stretched across the whole relationship, which is a large part of why it leaves people so disorientated. The same research found it steadily wears down a person’s sense of who they are and their ability to trust others, and that recovery often begins with getting real distance from the person responsible.
Left unbroken, this cycle leaves people very vulnerable to serious mental health difficulties, including depression. In the most severe cases, when someone feels there is no way out, it can contribute to a genuine crisis. That is exactly why naming what is happening matters so much.
What are the most common gaslighting tactics?
Gaslighting is really an umbrella for a whole repertoire of manipulation tactics. If you have been in a relationship that felt abusive or dysfunctional, whether with a partner or a family member, you may recognise some of these.
Projecting their own faults onto you
This is the gaslighter’s classic move. It deflects attention away from them, often with a certain irony, because they will accuse you of the very things they are doing themselves. It can be very convincing, because they are describing behaviour they know intimately from the inside. You end up spending so much time and energy defending yourself that you stop noticing their behaviour at all.
Using confusion to wear you down
The aim here is to make you question everything you know about yourself. We all need a degree of stability to function and stay well. By constantly questioning you, the gaslighter can pass themselves off as the concerned partner or friend who is only looking out for you, which pulls you in closer. They will often say something cutting and then quickly follow it with warmth, creating a push and pull effect that keeps you off balance.
Triangulation: turning other people against you
Gaslighters are skilled at playing people off against each other. They have a keen sense of who will back them no matter what, and whose opinion matters most to you. They use this to set up what is known as triangulation, bringing a third party into a disagreement, often someone with no real involvement, and using them to suggest that everyone secretly agrees you are in the wrong.
Isolating you from friends and family
This is the flip side of triangulation. Having positioned other people against you, they will also insist that those people cannot be trusted, that they are lying to you or do not have your best interests at heart. Slowly, they install themselves as the only person you can rely on. It is a hallmark of a controlling or coercive relationship, and it hands them more and more of your power.
What are common gaslighting phrases?
Certain phrases come up again and again. You may not hear them word for word, but you will recognise the flavour.
“I think you have issues” (it’s you, not me). Here the focus is flipped back onto you. It is projection again: they try to convince you that you are the manipulative one.
“You’re overreacting” or “you’re too sensitive.” This one is quietly damaging, because none of us want to feel we are creating drama. It breeds self-doubt and makes it easier to drop your boundaries even further.
“Why can’t you just let it go?” This feeds the confusion. They might treat you badly one day and behave the next as if nothing happened, then dismiss it out of hand when you try to raise it.
“I never said that, you’re imagining things.” Over time, this kind of flat denial can leave you questioning your memory of even small, everyday things.
Why do people gaslight?
It helps to understand what sits underneath the behaviour. In my experience, the people who gaslight most often are those with a fragile sense of themselves. They may come across as supremely confident, even arrogant, but that front usually covers a deep insecurity, frequently rooted in difficult or neglectful early experiences. Controlling other people, and being seen as the one who is always right, is how they hold that shaky self-image together. Putting someone else down is a way of feeling bigger. Understanding this does not excuse it, but it does explain why you cannot reason a gaslighter out of it. Their need to be in control is doing something for them, so your evidence is beside the point.
How do you deal with gaslighting?
Recognising the tactics is the first step, and often the hardest. But you cannot out-manipulate a skilled manipulator, so trying to beat them at their own game rarely ends well. Where the situation is serious enough, the most effective response is usually to put as much distance as you can between yourself and the person doing it.
That is not always possible straight away, particularly at work or within close family. In those cases, the goal is to become unshakeable about who you are. Trust your own read on the situation, and do not let the person believe they have convinced you. Do not over-invest or over-explain, but do not freeze them out either, as that can invite more conflict. When they say something designed to provoke, a calm “ok” followed by a change of subject gives them very little to work with. Do that consistently and many will move on.
“You have to hold on to your own reality, your own beliefs, your own opinions, even if you don’t feel like the strong one in that interaction. Don’t try to argue your point, because that is never going to work. A person who is narcissistic is not going to take on your point of view. You need to recognise that gaslighting is taking place, step back, and walk away.”
Dr Becky Spelman, from the video above
It is also worth knowing that this behaviour is taken seriously in law. In Ireland, coercive control in an intimate relationship became a criminal offence under the Domestic Violence Act 2018, which came into effect on 1 January 2019. Gaslighting is not named directly in the legislation, but it is widely recognised as one of the ways coercive control shows up.
How the Private Therapy Clinic can help
If any of this feels familiar, you do not have to work it out on your own. Living with this kind of manipulation can leave lasting marks on your confidence and your mental health, and talking therapy gives you a space to rebuild trust in your own judgement and to recover from narcissistic abuse and coercive control. Where there is an overlap with depression, anxiety or trauma, our psychiatrists can also help assess whether additional support or treatment would make a difference. If you are not sure where to start, you are welcome to book a free 15-minute consultation, and we will help you find the right path forward.
