Corporal punishment is any punishment that uses physical force to cause pain or discomfort, however light. The UN Committee on the Rights of the Child uses this as its formal definition, and it covers everything from a quick smack on the hand to striking a child with a belt. While often discussed as though it were limited to spanking, corporal punishment includes a much wider range of physical acts, and decades of research have consistently linked it to harm in children’s development, behavior, and brain structure.
What Counts as Corporal Punishment
The most common forms are hitting, smacking, slapping, and spanking with an open hand. But the definition also extends to striking a child with an object like a belt, wooden spoon, stick, or shoe. Less obvious forms include kicking, shaking, pinching, pulling hair, boxing ears, scratching, and forcing a child to hold an uncomfortable position for an extended time. The key element is that physical force is deliberately used to discipline, regardless of how mild it seems.
Corporal punishment happens in two main settings: the home and the school. In homes, it’s typically carried out by parents or caregivers. In schools, it usually means a principal or teacher striking a student, often with a wooden paddle, as a formal disciplinary measure.
Where It’s Still Legal
Globally, 70 countries have fully banned corporal punishment in all settings, including the home. But many nations, including the United States, still permit it in certain contexts.
In the U.S., nineteen states allow public school staff to use corporal punishment on students from preschool through 12th grade. These states are concentrated in the South and parts of the Midwest: Alabama, Arkansas, Arizona, Colorado, Florida, Georgia, Idaho, Indiana, Kansas, Kentucky, Louisiana, Missouri, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, and Wyoming. New Mexico was the last state to ban it, doing so in 2011. Some states that still allow it have added restrictions. North Carolina, for example, prohibits its use on children with disabilities and lets parents opt out by submitting a form at the start of the school year. Texas passed a similar opt-out law.
No U.S. state has outlawed spanking by parents in the home. Legal boundaries exist only where discipline crosses into what state law defines as abuse, and those lines vary widely.
How Common It Is
Corporal punishment has been declining in the U.S. over the past 25 years, but it remains widespread. In the late 1990s, roughly 94% of caregivers reported using physical punishment. More recent data puts the number lower but still high: about 63% of adults report having spanked their children, and among children ages three and four, the rate of physical punishment stays above 60%.
Attitudes have shifted somewhat. Around 45% of survey respondents now say a “good hard spanking” is sometimes necessary, down from the roughly 76% of men and 65% of women who held that view in earlier surveys. Still, among current caregivers, 42% report using physical punishment at least once a month.
Effects on Behavior and Mental Health
The research base on corporal punishment is unusually consistent. A landmark review of 27 studies on physical punishment and child aggression found that every single one showed a significant link between the two, regardless of sample size, study location, or children’s ages. Children who are physically punished show higher levels of aggression toward parents, siblings, peers, and later in life, romantic partners.
One of the first large long-term studies, tracking over 800 children, controlled for initial behavior problems, family income, and the emotional environment at home. Even with those factors accounted for, physical punishment between ages six and nine predicted more antisocial behavior two years later. The punishment wasn’t correcting bad behavior; it was predicting worse behavior down the line.
Beyond aggression, physical punishment is linked to depression, anxiety, feelings of hopelessness, drug and alcohol use, and broader psychological difficulties in children, adolescents, and adults. These aren’t just correlations driven by extreme cases. The pattern holds across the full spectrum of physical discipline, including ordinary spanking.
There’s also a dose-response pattern that raises safety concerns. A large Canadian study found that children who were spanked were seven times more likely to be severely assaulted by their parents (punched, kicked) than children who weren’t spanked. And in an American study, infants who had been spanked in the prior month were 2.3 times more likely to suffer an injury requiring medical attention. Physical punishment tends to escalate, particularly when it doesn’t produce the desired behavior change.
What Happens in the Brain
Neuroimaging research has revealed that corporal punishment doesn’t just affect behavior. It changes brain structure and function. Children who were spanked showed heightened activity in the prefrontal cortex when viewing fearful faces, meaning their brains reacted to potential threats more intensely than the brains of children who weren’t spanked. This is the same exaggerated threat response seen in children who have experienced more severe forms of abuse or exposure to community violence.
Adults who experienced harsh corporal punishment as children had measurably less gray matter in the prefrontal cortex, the part of the brain responsible for decision-making, impulse control, and reasoning. These structural reductions overlapped with the same brain regions that showed heightened activation in spanked children, suggesting a trajectory: early overactivation of threat responses, followed by long-term changes in brain volume. Physical punishment has also been linked to alterations in the brain’s dopamine system, which plays a role in vulnerability to substance abuse.
Researchers believe these changes may be driven partly by elevated stress hormones. When a caregiver, the person a child depends on for safety, is also the source of pain, it disrupts the attachment relationship and chronically activates the body’s stress response. Over time, that chemical environment reshapes how the brain develops. Studies have also found links between physical punishment and slower cognitive development, with negative effects on academic performance.
Discipline Strategies That Work Better
The core problem with corporal punishment is that it suppresses behavior through fear rather than teaching a child why the behavior is wrong or what to do instead. Positive discipline takes the opposite approach: setting firm boundaries while treating the child with respect and building their ability to cooperate, solve problems, and regulate their own emotions.
In practice, positive discipline involves several concrete skills. Clear, positive communication replaces commands and threats. Encouragement (recognizing effort and improvement) replaces punishment for mistakes. When behavioral issues arise, parents work through them with the child using problem-solving rather than consequences designed to inflict discomfort. Parents also learn to manage their own frustration, since most physical punishment happens in moments of high emotion rather than as a calm, deliberate choice.
A recent study tested a structured six-week positive discipline program with mothers of young children. After the program, mothers’ confidence in their parenting skills increased substantially, and those gains held up three months later. The comparison group, which didn’t receive the training, showed no change. This matters because low parenting confidence is one of the strongest predictors of relying on physical punishment. When parents feel equipped with other tools, they use them.
Other well-supported strategies include brief time-outs (removing the child from the situation for a short period), natural consequences (letting a child experience the result of their choice when it’s safe to do so), and redirection for younger children who can’t yet reason through their behavior. None of these require physical force, and all are more effective at producing lasting behavioral change because they help children internalize the lesson rather than simply fear the punishment.