Gaslighting is a form of psychological manipulation in which a person or group causes someone to question their own perceptions, memories, sanity, or reality.
The term originates from the 1938 stage play Gas Light (and its 1940/1944 film adaptations), in which a husband systematically manipulates his wife—by dimming the gas lights in their home and then denying that the lights have changed—into doubting her own senses and believing she is going mad.
Core features
- The manipulator repeatedly denies, contradicts, or reframes events, facts, or feelings that the target has experienced.
- The goal (conscious or not) is to erode the target’s confidence in their own judgment so the manipulator gains control, avoids accountability, or maintains power in the relationship.
- It often occurs in intimate relationships, families, workplaces, or other settings involving an imbalance of power, but it can also appear in broader social or political contexts.
Common tactics
- Flat denial of things that happened (“That never occurred” / “You’re imagining it”).
- Trivialising the other person’s feelings (“You’re overreacting” / “You’re too sensitive”).
- Shifting blame onto the target.
- Withholding information or refusing to engage (“I don’t know what you’re talking about”).
- Using others to reinforce the false narrative (e.g., “Everyone agrees with me that you’re unstable”).
Effects
Targets may begin to second-guess themselves constantly, feel confused or “crazy,” lose trust in their own memory and judgment, become overly dependent on the manipulator for “reality checks,” experience anxiety or depression, and have difficulty making decisions.
Gaslighting is distinct from ordinary disagreement, forgetfulness, or differing perspectives; it is a pattern of deliberate or habitual distortion aimed at undermining another person’s sense of reality. Awareness of the pattern is often the first step in recognising and addressing it.
How to Protect
Protecting yourself from gaslighting centres on strengthening your trust in your own perceptions, reducing the manipulator’s influence, and building external support.
1. Recognise the pattern early
- Notice repeated denials of things you clearly experienced, dismissal of your feelings as “overreacting,” or attempts to make you doubt your memory.
- Track how interactions leave you feeling confused, anxious, or “crazy.” That emotional residue is often a useful signal.
2. Anchor yourself in reality
- Keep private records (notes, screenshots, dates, what was said/done). Written evidence counters “that never happened.”
- Trust your senses and memory first. You do not need the other person’s agreement for something to be real.
- When possible, check facts with neutral third parties or objective sources rather than relying solely on the person gaslighting you.
3. Set and enforce clear boundaries
- State what behaviour is unacceptable (“When you deny something we both experienced, I will end the conversation”).
- Follow through consistently. Repeatedly engaging with the distortion often feeds the dynamic.
- Limit the information you share about your doubts or vulnerabilities; gaslighters frequently use that material against you.
4. Reduce isolation
- Maintain relationships outside the problematic dynamic. Isolation makes gaslighting more effective.
- Talk to trusted friends, family, or colleagues about specific incidents (not just vague feelings). Outside perspectives help recalibrate your sense of reality.
- Consider professional support (therapist, counsellor) experienced with emotional abuse or coercive control if the situation is ongoing or severe.
5. Limit or end contact when necessary
- In relationships where the pattern is persistent, and the person refuses to change, the strongest protection is often distance or no-contact.
- In workplaces or family situations where full exit is difficult, minimise one-on-one interactions, document everything, and use formal channels (HR, mediation) when appropriate.
6. Strengthen your internal resources
- Practice self-validation: regularly affirm what you know to be true about events and your feelings.
- Reduce dependency on the gaslighter for emotional regulation, decision-making, or self-worth.
- Prioritise sleep, physical health, and activities that reinforce your competence and autonomy.
Gaslighting thrives on confusion and self-doubt. The most effective protection is steady self-trust backed by evidence, boundaries, and external reality checks. If the situation involves ongoing emotional abuse, safety planning or professional guidance is often warranted.