Stockholm Syndrome is one of the most talked-about terms in pop psychology, yet it remains widely misunderstood. At its core, it describes a paradox: a person held captive, threatened, or abused develops warm feelings toward the very person causing them harm. It sounds irrational on the surface, but psychologists see it as a survival response, not a character flaw or a sign of weakness.

This guide breaks down where the term came from, what actually happens in the mind of someone experiencing it, the criteria experts use to identify it, and why it still matters in conversations about hostage negotiation, domestic abuse, and trauma recovery today.

What Is Stockholm Syndrome?

Stockholm Syndrome is a psychological response in which hostages, kidnapping victims, or people trapped in abusive relationships form an emotional bond with the person controlling or threatening them. Instead of fear and hatred, the victim may feel sympathy, loyalty, or even affection toward their captor or abuser, sometimes defending them or resisting help from outsiders.

It’s important to note that Stockholm Syndrome is not listed as an official diagnosis in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5-TR). Instead, it’s best understood as a described pattern of coping, one that researchers and clinicians use to make sense of an otherwise confusing emotional reaction to extreme stress.

Where Did the Term Come From? The Norrmalmstorg Bank Robbery

The story behind Stockholm Syndrome begins on August 23, 1973, at Kreditbanken on Norrmalmstorg square in Stockholm, Sweden. A man named Jan-Erik Olsson, out on prison leave, attempted to rob the bank. When the robbery went wrong, he took four bank employees hostage and barricaded them inside the vault. One of his demands was the release of a friend from prison, who was then brought to the scene and joined him.

For the next six days, the hostages and their captors remained confined together in the vault while police negotiated outside. During that time, something unexpected happened. Rather than growing more afraid of Olsson, several hostages appeared to grow closer to him. He reportedly offered small comforts, like a coat when someone was cold and reassurance during frightening moments, and this relative kindness stood in sharp contrast to the danger of the situation.

By the time police ended the standoff with tear gas, some hostages had become more distrustful of the authorities trying to save them than of the men holding them captive. After their release, several of the former hostages publicly defended their captors, and some reportedly raised money for their legal defense and declined to testify against them in court.

Swedish criminologist and psychiatrist Nils Bejerot, who assisted police during the crisis, coined the term “Stockholm Syndrome” to describe this bond. The case became the reference point for a phenomenon that researchers were only beginning to understand.

The Three Core Signs Experts Look For

Because Stockholm Syndrome isn’t a formal clinical diagnosis, there’s no single checklist for identifying it. However, researchers studying hostage and captivity cases have generally agreed on three characteristics that need to be present:

1. The hostage develops positive feelings toward the captor. This can range from sympathy to genuine affection or loyalty.
2. The hostage develops negative feelings toward police, authorities, or anyone trying to help them. This might show up as distrust, resentment, or outright refusal to cooperate with rescue efforts.
3. The captor begins to show positive feelings toward the hostage. Without some reciprocity from the captor, researchers argue the bond doesn’t meet the full definition.

Some researchers also add a fourth marker: the hostage starts to see the captor’s perspective, viewing them as more “human” and even believing they share similar goals. Experts have also noted that for the syndrome to be considered genuine, there typically shouldn’t be a pre-existing relationship between the captor and the victim before the incident began.

It’s worth knowing that Stockholm Syndrome is considered rare. Data drawn from an FBI hostage/barricade database covering thousands of incidents suggests the large majority of hostages do not show these signs after being rescued; most report anger or distrust toward their captor rather than sympathy.

Why Does It Happen? The Psychology Behind the Bond

Several overlapping psychological mechanisms are thought to explain why some people develop this kind of bond under extreme stress.

A Survival Strategy, Not a Choice

At its root, Stockholm Syndrome is widely viewed as a subconscious survival mechanism. When someone’s life is entirely in another person’s hands, appeasing that person, agreeing with them, and avoiding conflict can feel like the safest path forward. Small acts of kindness from a captor, things that would be unremarkable in any normal context, can take on outsized emotional weight when a person’s life is on the line, triggering something close to gratitude.

“Us Versus Them” Thinking

Researchers point to an in-group/out-group dynamic that can form during hostage situations. The captor and hostages, trapped together in close physical proximity for an extended period, can start to feel like a shared unit facing a common threat: the authorities outside. If the captor treats the danger posed by police as a threat to everyone’s survival, hostages may absorb that same fear, effectively shifting their trust away from the people trying to rescue them.

Dependence and Distorted Thinking

In captivity, victims often rely on their captor for basic needs: food, water, safety, even permission to move or speak. That dependence can distort how a person views the relationship. Psychologists describe this through the lens of cognitive schemas, deep-seated mental patterns shaped by experience. Prolonged dependency and vulnerability can warp a hostage’s sense of who is actually on their side, making the captor feel like an ally rather than the source of danger.

Stockholm Syndrome Beyond Hostage Situations

While the term was born from a bank robbery, mental health professionals have observed similar patterns in other high-control or abusive dynamics, including:

• Domestic violence and intimate partner abuse, where a victim may defend, minimize, or stay loyal to an abusive partner despite repeated harm.
• Child abuse, where a child depends entirely on an abusive caregiver for survival and may form a protective bond with them.
• Cult involvement, where members can develop deep loyalty to controlling leaders despite manipulation or harm.
• Human trafficking, where victims may feel a confusing sense of attachment to traffickers who also control their access to safety and basic needs.

This is closely related to concepts like trauma bonding, learned helplessness, and battered person syndrome, which describe similar patterns of a victim staying emotionally tied to someone who has caused them harm. Some researchers now argue that “Stockholm Syndrome” as a label may oversimplify what’s really happening, and prefer the term appeasement, an unconscious, biologically driven response aimed at reducing harm and increasing the chances of survival, rather than a “syndrome” someone develops.

Criticism and Ongoing Debate

Stockholm Syndrome is a well-known term, but it isn’t without controversy in the psychological community. Critics point out that:

• It has never been formally recognized as a diagnosable condition.
• The original case is based on a small, specific incident rather than controlled research.
• Because it lacks strict clinical criteria, the term is sometimes applied loosely to describe any sympathetic reaction toward an abuser, which can blur its actual meaning.
• Framing a victim’s coping response as a “syndrome” can risk shifting focus onto the victim’s behavior rather than the abuser’s actions.

Despite this debate, the underlying experience it describes, feeling emotionally tied to someone who has caused you harm, is recognized as real and valid by mental health professionals, even if the label itself remains imperfect.

Impact on Hostage Negotiation and Law Enforcement

The Norrmalmstorg robbery reshaped how crisis negotiators think about hostage situations. Rather than treating a bond between captor and hostage purely as a problem, some negotiators now see it as something that can, in certain cases, improve a hostage’s odds of survival, since a captor who feels connected to their hostages may be less likely to harm them.

At the same time, negotiators are trained to try to “humanize” hostages in the eyes of a captor, for example, by mentioning that a hostage’s family is waiting for them, to encourage empathy without escalating the danger. This shift in law enforcement approach is one of the lasting legacies of the 1973 case.

Treatment and Recovery

Because Stockholm Syndrome often develops out of a genuine survival need, working through it afterward can be complicated. Someone who bonded with their captor or abuser as a coping mechanism may not immediately identify as a “victim,” which can complicate both emotional processing and any legal proceedings that follow.

Recovery typically involves trauma-informed therapy, which may include:

• Trauma-focused psychotherapy, such as cognitive behavioral therapy (CBT) or EMDR, to process the traumatic experience
• Psychoeducation, helping the person understand why the bond formed, so they don’t blame themselves for how they responded
• Rebuilding trust, particularly toward support systems, authorities, or loved ones who may have been pushed away during the ordeal
• Social support, reconnecting with family, friends, or support groups to counter the isolation that often reinforced the bond in the first place

A strong therapeutic relationship matters enormously here, since the survivor may need time and patience to reframe their experience without feeling judged for the way they coped.

Final Thoughts

Stockholm Syndrome remains one of the most compelling illustrations of how the human mind adapts under extreme threat. What looks irrational from the outside, sympathizing with someone who holds power over your safety, often reflects a deeply logical survival strategy playing out under conditions most people will never face. Understanding it not as weakness but as a coping mechanism is key to supporting survivors, whether they’re recovering from a hostage crisis, an abusive relationship, or another form of captivity, with compassion instead of judgment.

If you or someone you know is in an abusive relationship or unsafe situation, reaching out to a mental health professional or a domestic violence support service can be an important first step toward safety and recovery.