It is an extremely effective form of emotional abuse that causes a victim to question their own feelings, instincts, and sanity, which gives the abusive partner a lot of power (and we know that abuse is about power and control). Once an abusive partner has broken down the victim’s ability to trust their own perceptions, the victim is more likely to stay in the abusive relationship.
There are a variety of gaslighting techniques that an abusive partner might use:
Withholding: the abusive partner pretends not to understand or refuses to listen. Ex. “I don’t want to hear this again,” or “You’re trying to confuse me.”
Countering: the abusive partner questions the victim’s memory of events, even when the victim remembers them accurately. Ex. “You’re wrong, you never remember things correctly.”
Blocking/Diverting: the abusive partner changes the subject and/or questions the victim’s thoughts. Ex. “Is that another crazy idea you got from [friend/family member]?” or “You’re imagining things.”
Trivializing: the abusive partner makes the victim’s needs or feelings seem unimportant. Ex. “You’re going to get angry over a little thing like that?” or “You’re too sensitive.”