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Short answer: current authoritative reviews do not establish that playing violent video games causes violent crime, lethal violence, or mass shootings. They do find a small, reliable average association between violent-game exposure and some measures of aggression, such as aggressive thoughts, feelings and certain behaviors. That finding is not the same as evidence that games cause assault, homicide or other criminal violence.
The distinction matters because “aggression” and “violence” are different outcomes, and the strongest reviews say serious violence has either not been adequately studied or has not been shown to result from game play. The American Psychological Association (APA) describes violence as a complex social problem and warns that blaming violent events on games alone is scientifically unsound.
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What the best reviews actually conclude
The most defensible summary is two-part:
- Violent-game use is linked, on average, with a small increase in aggressive outcomes measured in studies.
- No authoritative review in the evidence considered here establishes that violent-game play causes criminal violence, lethal violence or mass shootings.
The APA’s 2020 task-force report states that there is “insufficient scientific evidence to support a causal link between violent video games and violent behavior.” It also says evidence is insufficient to determine whether violent-game use causes lethal violence. In other words, the evidence does not justify a claim that a game is a demonstrated cause of a murder or mass shooting.
Earlier APA work reached a more specific conclusion about aggression. Its 2015 review, based on more than 150 research reports and four meta-analyses, reported a consistent relation between violent-game use and increased aggressive behavior, aggressive cognitions and aggressive affect. It also reported decreases in some prosocial behavior, empathy and sensitivity to aggression. The same review said evidence was insufficient to connect violent-game play with criminal violence or delinquency.
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A later APA task-force assessment used a systematic evidentiary review followed by a meta-analysis of high-utility studies. The subsequent report says the bulk of evidence converges on a small and reliable relationship with aggressive outcomes across laboratory studies, longitudinal studies and meta-analyses. “Small” describes the average association; it does not mean every player responds in the same way, nor does it identify game play as a sufficient cause of serious violence.
Aggression is not the same as violence
Many arguments about games become confused because they treat every aggressive measure as if it were a violent crime statistic. The APA separates the concepts.
| Outcome | What researchers may measure | What it does not establish |
|---|---|---|
| Aggressive thoughts | Hostile interpretations, revenge-related ideas or willingness to respond aggressively on a questionnaire or task | That a participant will attack someone outside the study |
| Aggressive feelings | Self-reported anger, irritation or hostility after exposure | That anger becomes assault or another crime |
| Aggressive behavior | Responses in a laboratory task, competitive activity or self-report measure | That the person commits criminal or lethal violence |
| Violence | Physical acts that can include assault, homicide or other criminal conduct | That a modest laboratory association predicts mass violence |
| Lethal or mass violence | Homicide, mass shooting or comparable real-world events | These outcomes are caused by game exposure when they have not been adequately studied |
A participant who selects a harsher response in a laboratory exercise has not committed an assault. A hostile thought is not a homicide. Researchers can study aggression as an outcome without claiming that it is an interchangeable proxy for criminal violence.
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The evidence comes from several designs. Each answers a different question and has limitations that matter when the outcome is extrapolated to real-world violence.
Laboratory experiments
Experiments can randomly assign participants to play different kinds of games and then measure immediate responses. Random assignment helps reduce pre-existing differences between groups, so these studies can test whether exposure is followed by a short-term change in an aggressive measure.
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The trade-off is that the outcome is usually a controlled task, rating or self-report rather than an assault or other crime. A short-term change in a laboratory measure cannot, by itself, demonstrate a long-term effect on violent offending.
Longitudinal studies
Longitudinal research follows people over time and can examine whether earlier game use is associated with later aggressive outcomes. This design is useful for studying development and persistence, but it must account for baseline aggression and other differences that may influence both game choice and later behavior.
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If people who already have higher aggression are more likely to choose violent games, a simple association can partly reflect that prior tendency. Statistical controls can reduce confounding, but they do not automatically prove that the remaining relationship is causal.
Meta-analyses and systematic reviews
A meta-analysis combines results from multiple studies to estimate an average relationship and assess how consistent it is. The 2017 APA task-force assessment began with a systematic review and then analyzed high-utility studies. The later task-force report describes convergence across experiments, longitudinal studies and meta-analyses for a small association with aggressive outcomes.
Pooling studies improves precision, but it cannot create evidence for an outcome that researchers rarely measure. The APA’s 2020 report specifically notes that research on whether violent games cause lethal violence is insufficient.
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Why the finding is described as a “small association”
An association means two measured variables tend to occur together more often than would be expected by chance. It does not specify why. Possible explanations include a causal effect, selection effects, shared background factors or a combination.
The word “small” refers to the average size of the relationship across studies. Average effects can coexist with larger or smaller effects for particular people and settings, but the aggregate result does not support a sweeping claim that games transform ordinary players into violent criminals.
Researchers also distinguish a short-term effect from a durable behavioral change. An immediate increase in hostile thoughts after an intense game session, if observed, is not evidence of a lasting disposition or a future violent act. Longitudinal studies address duration more directly, yet the serious-violence outcome remains inadequately established.
Do violent games cause mass shootings?
The available authoritative assessments do not establish that they do. Mass shootings are examples of lethal violence, and the APA says research is insufficient to determine whether violent-game use causes lethal violence. The evidence for small changes in aggression cannot be converted into proof of causation for a rare, complex event.
APA President Sandra L. Shullman, PhD, summarized the caution in 2020: “Attributing violence to video gaming is not scientifically sound and draws attention away from other factors, such as a history of violence, which we know from the research is a major predictor of future violence.”
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This does not mean media exposure is irrelevant to every person or context. It means a serious claim requires evidence that directly measures serious violence, handles alternative explanations and demonstrates a causal pathway. The reviews cited here do not provide that level of evidence for games and mass shootings.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What could explain the aggression association?
Several interpretations can fit a small average relationship, and the studies do not reduce the issue to one universal mechanism.
Content and rehearsal
Repeatedly performing hostile actions in a game may make aggressive responses more cognitively accessible in the short term. That is a proposed explanation for changes in thoughts or feelings, not proof that a player will carry those responses into criminal conduct.
Player selection
People differ before they pick a game. Baseline aggression, preferences, social environment and other characteristics can influence both game choice and measured outcomes. Longitudinal analyses and statistical controls attempt to address these differences, but no method eliminates every possible confounder.
Context and individual differences
The same game can be experienced in different family, peer and personal contexts. The aggregate finding is therefore an average, not a prediction about an individual child or adult. The reviews support careful attention to context while rejecting a single-cause explanation for violence.
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How to read competing claims about the studies
When you encounter a headline or argument, check five features before accepting its conclusion.
- Outcome type: Is the study measuring aggressive thoughts or a laboratory response, or is it measuring verified criminal or lethal violence?
- Study design: Was exposure randomly assigned, observed over time or inferred from a set of correlational studies?
- Effect size: Does the report describe a small average association, and is that qualification retained in the headline?
- Confounders: Did the analysis account for baseline aggression and other factors that could affect both game use and behavior?
- Causal language: Does the evidence show correlation, a short-term laboratory effect or a demonstrated cause of serious violence?
A claim that says “violent games cause violence” without naming the measured outcome is omitting the most important part of the evidence. Conversely, saying that every study finds no effect is also inaccurate: the APA reviews do find a small, reliable association with several aggressive outcomes.
What parents and players can reasonably do
Age ratings, content descriptors and parental controls are practical tools for managing what a child can access. They can help families set boundaries around violent content, online interaction and play time according to the child’s age and the household’s values.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallThey should not be presented as products proven to prevent assault, homicide or mass violence. The APA’s recommendation for adequate parental controls is a content-management measure, not evidence that controls eliminate violent behavior.
A useful household approach
- Review the game’s age rating and content descriptors before purchase or download.
- Use the console, computer or account settings to restrict age-inappropriate content and purchases.
- Discuss the difference between fictional game actions and acceptable behavior toward real people.
- Pay attention to a child’s overall well-being and behavior rather than treating game exposure as a diagnosis or sole explanation.
- Seek qualified professional help if there are signs of actual threats, escalating aggression or plans to harm someone.
What the evidence can and cannot answer
| Question | Best-supported answer |
|---|---|
| Do violent games make everyone violent? | No. The evidence shows a small average association with some aggressive outcomes, not a universal transformation of players. |
| Do violent games cause criminal violence? | No causal link is established in the authoritative reviews considered here; the 2015 APA review found evidence insufficient for criminal violence or delinquency. |
| Do violent games cause mass shootings? | No. The APA says evidence is insufficient to determine whether violent-game use causes lethal violence. |
| Can a game affect thoughts or feelings in the short term? | Studies summarized by the APA report associations with aggressive cognitions, affect and behavior, generally small on average. |
| Does a laboratory aggression task equal an assault? | No. The measures represent different outcomes and must not be treated as interchangeable. |
| Is game exposure the only relevant factor in violence? | No. Violence is a complex social problem with multiple contributing factors; APA specifically identifies a history of violence as a major predictor of future violence. |
The bottom line for the “do games cause violence?” debate
The strongest evidence supports a narrow conclusion: violent video games have a small, reliable association with certain aggressive thoughts, feelings and behaviors. It does not support the claim that playing these games causes criminal, lethal or mass violence. Serious violence requires attention to the broader set of factors that predict it, rather than assigning a scientifically unsupported single cause to game content.
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