The boomerang effect is what happens when an attempt to persuade someone doesn’t just fail, but pushes them in the opposite direction. A campaign designed to reduce drinking makes people drink more. A message encouraging energy conservation causes some households to use more electricity. A warning label on a violent movie makes teenagers want to watch it more. The harder you push, the harder people push back.
Why People Push Back
The boomerang effect is rooted in a psychological concept called reactance, first described by psychologist Jack Brehm in 1966. The core idea is simple: when people feel their freedom to choose is being threatened, they experience a motivational state that combines negative emotions with oppositional thinking. That state drives them to reassert the very freedom they feel is under attack, often by doing exactly what the message told them not to do.
This isn’t stubbornness for its own sake. It’s a predictable response to perceived coercion. The more forcefully a message tells you what to think or do, the more your brain registers it as a threat to your autonomy. And the natural response to a threat is to fight it. The result is that persuasion doesn’t just miss its target. It actively backfires, increasing attraction to the behavior the message tried to discourage.
Anti-Smoking Ads That Increased Smoking
Some of the most striking examples of the boomerang effect come from public health campaigns. In the early 2000s, researchers studied how adolescents responded to two different anti-smoking campaigns: the American Legacy Foundation’s “truth” campaign and Philip Morris’s “Think. Don’t Smoke” campaign. After controlling for social influences, home environment, and demographics, exposure to the Philip Morris ads was independently associated with more favorable attitudes toward the tobacco industry and greater odds of intending to smoke. The very ads meant to deter teens from smoking made them more likely to consider it.
Alcohol prevention research tells a similar story. In one study, undergraduates were shown either high-threat ads (using phrases like “conclusive evidence” and “any reasonable person must acknowledge these conclusions”) or low-threat ads with softer language like “good evidence” and “you may wish to consider these conclusions carefully.” The high-threat messages were rated more negatively and prompted greater intentions to drink. In a follow-up, students who saw the high-threat ads actually consumed more beer in a taste test than those who saw the gentler versions.
Even warning labels can trigger this “forbidden fruit” effect. Research has shown that warning labels make violent movies and television more appealing to young people. Attributing the warning to a highly authoritative source made it worse: violent films with a warning from the U.S. Surgeon General were more attractive to adolescents than films carrying the same warning with no named source.
The Energy Conservation Paradox
The boomerang effect isn’t limited to health messaging. It shows up whenever people learn how their behavior compares to others. In a well-known field experiment in San Marcos, California, researchers sent households information about how their energy consumption compared to their neighbors. The goal was to nudge high-energy users to cut back. It worked for them, but it created an unexpected problem: households that were already using less energy than average started using more after learning they were below the norm.
A larger replication confirmed this pattern and put numbers to it. In that study, households in the lowest decile of energy use increased their consumption by 3.4% after receiving the comparison feedback, while the highest-consuming households cut usage by 6.0%. The people who were already doing the “right” thing saw that most of their neighbors were using more electricity and, consciously or not, drifted toward the higher number. The descriptive norm, the information about what most people actually do, gave low users implicit permission to consume more.
The San Marcos researchers found a workaround: adding a simple smiley face emoticon next to the usage data for low consumers. This small signal of social approval (an “injunctive norm” telling people their behavior was good) eliminated the boomerang effect by reinforcing that using less energy was valued, not just unusual.
Political Polarization Online
The boomerang effect has taken on new relevance in the age of social media. A common assumption is that exposing people to opposing political viewpoints will moderate their positions. The evidence suggests the opposite often happens. A field experiment on Twitter found that when U.S. users were exposed to posts from opinion leaders of the opposing political party, their political polarization increased rather than decreased. Seeing the other side’s arguments didn’t soften their views. It hardened them.
This dynamic helps explain why calls for people to “just listen to the other side” can be counterproductive. When the opposing message feels aggressive, dismissive, or threatening to a person’s identity, reactance kicks in. The result is more extreme positions on both sides, not convergence.
What Triggers the Boomerang Effect
Not every persuasive message backfires. The boomerang effect is most likely to occur under specific conditions:
- Forceful, commanding language. Messages that leave no room for personal choice (“you must,” “any reasonable person would agree”) trigger stronger reactance than those offering information and letting people draw their own conclusions.
- High perceived authority. Paradoxically, the more authoritative the source, the more threatening it can feel to personal autonomy, especially for younger audiences.
- Identity threat. When a message implies that your current beliefs or behaviors make you foolish, irresponsible, or morally wrong, defensive processing takes over.
- Descriptive norms without approval signals. Telling people what most others do, without indicating whether that behavior is good or bad, can pull outliers toward the majority in either direction.
Communication Strategies That Reduce Reactance
Researchers have identified several approaches that make persuasion less likely to boomerang. The common thread is reducing the sense that someone’s freedom is being taken away.
One effective technique is using narrative and storytelling rather than direct commands. When people identify with a character in a story, they become more willing to consider viewpoints they’d normally reject, because they’re experiencing the message through someone else’s eyes rather than feeling lectured. Entertainment-education programs, where health or social messages are woven into plotlines, work partly because they disguise the persuasive intent enough to slip past the reactance response.
Two-sided messages also help. Rather than presenting only the argument you want people to accept, acknowledging counterarguments preemptively reduces the audience’s need to generate their own resistance. It signals fairness and respect for the listener’s intelligence.
Self-affirmation is another tool. When people are given a chance to reflect on values or strengths that matter to them before encountering a challenging message, they become less defensive. The idea is that when your sense of self feels secure, a persuasive message is less threatening. You can engage with the information on its merits rather than treating it as an attack.
The simplest takeaway from decades of boomerang effect research is this: the more a message respects people’s sense of autonomy, the less likely it is to push them in the wrong direction. Softer language, genuine choices, and information presented without coercion consistently outperform heavy-handed approaches, even when the heavy-handed version feels more urgent or righteous to the person delivering it.