Is spanking actually harmful?

The evidence consistently links spanking with harmful child outcomes. A 2016 meta-analysis of 111 effect sizes representing over 160,000 children found that 13 of 17 mean effect sizes significantly associated spanking with detrimental outcomes, including increased aggression, antisocial behavior, and mental health problems. Effect sizes for spanking did not substantially differ from those for physical abuse. Propensity-score-matched longitudinal data confirm that spanking at age 5 predicts increases in externalizing behavior problems at ages 6 and 8, even after controlling for sociodemographic factors and baseline behavior. Spanking also loads onto the same factor as physical and emotional abuse in ACE (Adverse Childhood Experience) models and is independently associated with adult suicide attempts, substance use, and heavy drinking. Across studies, no consistent evidence supports spanking as an effective discipline tool; maternal warmth, by contrast, predicts improvements in social competence.

Contested

Research is largely consistent

What is debated: One area of ongoing discussion involves whether race or cultural context moderates the association between spanking and child outcomes. Some studies report smaller or attenuated effect sizes in certain racial and ethnic groups, though the overall direction of findings remains negative across groups.

What This Means

Parents looking for effective discipline strategies can rely on a substantial evidence base: spanking is linked to more child aggression over time, not less, and does not improve social competence. Maternal warmth is a stronger and more consistent predictor of positive child behavior. Approaches that prioritize the parent-child relationship, clear behavioral expectations, and empathic responses to misbehavior are better supported by the data. Parents who currently spank are not alone in believing it works; public resistance to the research is well documented, often grounded in personal experience or ideological frameworks. Pediatricians and family support programs can address this gap by translating findings clearly and offering concrete alternatives, such as parent training programs with demonstrated effectiveness.

Receipts

• Spanking and child outcomes: Old controversies and new meta-analyses. (2016)
  Cited 888 times

  The largest and most comprehensive meta-analysis to date on spanking specifically: 111 effect sizes, 160,000+ children, showing consistent links to harm across study designs and no meaningful difference from physical abuse in effect size.

• Strengthening Causal Estimates for Links Between Spanking and Children’s Externalizing Behavior Problems (2017)
  Cited 84 times

  Used propensity score matching and lagged variables on a nationally representative sample of 12,000+ children to establish that spanking at age 5 causes deterioration in externalizing behavior by ages 6 and 8, bringing the causal inference as close as possible without an experiment.

• Spanking and adult mental health impairment: The case for the designation of spanking as an adverse childhood experience (2017)
  Cited 238 times

  Analyzed CDC-Kaiser ACE data and found spanking clusters statistically with physical and emotional abuse, and independently predicts adult suicide attempts, heavy drinking, and street drug use beyond the effects of abuse alone.

• Hugs, Not Hits: Warmth and Spanking as Predictors of Child Social Competence (2016)
  Cited 83 times

  Longitudinal study of 3,279 urban families showing spanking predicts increased child aggression while maternal warmth predicts improved social competence, directly comparing the two approaches.

• Beating the Devil Out of Them: Corporal Punishment in American Children (2017)
  Cited 206 times

  Foundational large-scale research base linking spanking to physical aggression, delinquency, and adult intimate partner violence, drawing on data from over 9,000 families across two decades.

• Race as a Moderator of Associations Between Spanking and Child Outcomes (2016)
  Cited 54 times

  Examines whether race moderates the spanking-outcomes link, the key source of the primary contested area in this literature.