What Does "Yelling Discipline" Leave on a Child's Body?—The Impact on Stress Regulation as Shown by Recent Research

"If you're not a little strict, children won't listen."
"I was raised with spanking, but I turned out fine."
"I know yelling isn't good, but I end up raising my voice."

Such words are not uncommon in conversations about parenting. Parents, too, are tired, cornered, and lose their composure. Therefore, when harsh words or strong reprimands are quickly labeled as being a "bad parent," many become defensive.

However, the focus of the current research is not to judge parents. Instead, it reexamines from a biological perspective how children learn about stress and how they develop the ability to calm themselves.

A research team from Pennsylvania State University tracked the stress regulation relationship between 129 mother-child pairs aged 3 to 4. The focus of the study was RSA, or respiratory sinus arrhythmia, which is heart rate variability associated with breathing. This is used as an indicator to understand the functioning of the autonomic nervous system and responses to stress.

In the study, parents and children were given a difficult puzzle task while their heart rate and breathing were measured. Mothers could advise their children verbally but could not solve the problem for them. This setup was to observe how children struggle, how parents support them, and how their bodies react.

The results showed that "parental calmness" affects the child's bodily response. Especially young children do not handle stress on their own. They learn to calm their bodies through their parents' voices, expressions, breathing, attitudes, and response rhythms.

This is known as "co-regulation," a concept where children do not initially process emotions alone but gradually develop the ability to regulate their emotions and bodily responses with the help of parents or caregivers.

For example, when a child is crying and screaming, a parent calmly saying, "It's okay, you were surprised," or waiting with deep breaths when a child is angry after failing. These interactions are not mere consolations. For the child's nervous system, they are exercises in "returning from an agitated state."

Typically, as children grow, they gradually acquire the ability to calm themselves, moving away from complete reliance on parents. Between the ages of 3 and 4, the physiological influence of parents weakens, and the child's autonomy naturally increases.

However, in cases of harsh parenting, this flow can be reversed.

In the study, "harsh parenting" does not simply mean setting rules or teaching children patience. It refers to interactions involving physical and psychological aggression, such as yelling, hitting, intimidating, and psychologically cornering.

Children in such environments tend to become more dependent on external regulation rather than becoming independent from their parents as they grow. In other words, during the period when they should gradually be able to calm themselves, they find it increasingly difficult to manage their stress responses effectively.

Particularly important is the "difficulty in returning" from stress responses. The study showed that children who experienced harsh parenting took longer to return to normal stress levels after facing difficult tasks. This is not just about being hurt at the moment of being scolded. It means that after experiencing strong tension, the body struggles to return to a safe mode.

For children, parents are inherently a "safe haven." Even if something scary happens outside, or they fail or get confused, they regain their composure by their parents' side. By accumulating such experiences, children eventually develop a sense of security within themselves.

However, if parents themselves become sources of tension or fear, the child's body is placed in a complex situation. The person they want to seek help from also becomes a source of stress. As a result, children are more likely to lose opportunities to learn "how to calm themselves."

It is important to note that simply blaming parents who practice harsh parenting does not solve the problem. The study also points out that if mothers themselves have experienced harsh parenting or inappropriate treatment in the past, the risk of repeating similar interactions increases. Additionally, current mental health issues, economic difficulties, domestic conflicts, and work-related stress can further heighten this risk.

This is not just a matter of "parental personality." Stress, isolation, poverty, overwork, and lack of support inherited across generations may cast a shadow on family interactions.

Reactions to this research on social media were not simple either. In public posts, professionals in the medical, psychological, and educational fields shared the research, with voices acknowledging that "children's stress regulation involves both psychological and physiological aspects." On the other hand, reactions such as "It's dangerous to read this as an article blaming parents" and "Many parents are doing their best without support" were also prominent.

Furthermore, discussions about corporal punishment and yelling discipline often lead to generational conflicts on social media.
"It was normal in the past."
"I was spanked, but I'm fine."
"Yet, it leaves scars on children."
"Parents are human too, they can't be perfect."

Behind these clashing opinions is a difference in perspective: viewing discipline as "teaching order" versus "conducting it within a range that doesn't destroy the safe base."

The research suggests that teaching children rules is not inherently bad. Rather, it is necessary to teach children boundaries and social behavior. However, if the method leans towards fear and intimidation, the child's body is more likely to enter "defense mode" rather than "learning mode."

Even adults find it difficult to make calm decisions while being strongly reprimanded. Heart rate increases, breathing becomes shallow, and the mind goes blank. This is even more true for children. For infants whose brains and nervous systems are still developing, strong reprimands are processed by the body as "responses to danger" rather than "stimuli to encourage reflection."

In such a state, when told, "Why don't you understand?" or "Think properly," children may freeze before they can think. Crying, becoming silent, lashing out, running away, joking around—these reactions may seem like defiance or indulgence to adults. However, in reality, they may be responses that occur because the child's body cannot fully process the stress.

So, what should parents do?

Researchers are not saying that parents must always be perfectly calm. Parenting involves fatigue, impatience, and anger. What is important is not to never feel anger, but not to continue directing it at the child while being consumed by it.

For example, stepping away the moment you feel like raising your voice. Taking a deep breath for just a few seconds. Saying, "I'm about to get too angry, so let's wait a bit." There is no need to completely hide emotions in front of children. Rather, showing how to calm down when emotions are heightened becomes a learning experience for the child.

"Non-punitive parenting" is different from "permissive parenting."
When a child does something dangerous, it is necessary to stop them. When they hurt someone, they need to be properly confronted. Life rules are also necessary.

However, whether the way of conveying that becomes "complying through fear" or "showing boundaries while maintaining security" makes a big difference in the child's experience.

For example, instead of "What are you doing! That's the worst!" say, "That's dangerous, so I'll stop you."
Instead of "Don't cry!" say, "You were frustrated, but hitting is not okay."
Instead of "If you don't listen, I'll leave you behind," say, "It's time to go home. I understand you don't want to. Let's put on your shoes together."

Even the same restraint has different meanings depending on whether it attacks the child's personality or stops the behavior. Children receive not only the content of the words but also the adult's expression, the strength of their voice, and the tension in their body at that time.

One of the responses that easily gathers empathy on social media is "Parents also need to be cared for." This is extremely important. If parents are chronically sleep-deprived, economically unstable, isolated, and have no one to rely on, it becomes difficult to maintain calm responses.

To protect children's stress regulation, parents' stress regulation must also be protected. Behind what appears to be a domestic issue are social challenges such as childcare, work styles, community support, mental health care, and poverty measures.

Simply telling parents "Don't yell" is not enough.
We must also consider "how to create enough leeway to avoid yelling."

This study showed the potential impact of harsh parenting on children's stress regulation through physiological data such as heart rate and breathing. Of course, this study alone does not determine everything. The subjects were limited to mothers and children, and further examination of cultural differences and relationships with other caregivers such as fathers, grandparents, and childcare providers is necessary. Additionally, as an observational study, it should be applied cautiously to individual families.

Nevertheless, the questions raised by this study are significant.

Children do not only remember the content of the scolding.
Was their body safe at that time?
Were they scared?
Could they seek help?
Were they able to calm heightened emotions together with someone?

The accumulation of such experiences might form the foundation of a child's "ability to calm themselves."

There are times when strictness is necessary. However, controlling through fear and teaching boundaries within security are different. It is not just the strength of the parent that nurtures a child's autonomy. It is also the parent's ability to notice their own tension, recover, and attempt to reconnect.

For children, a calm adult is a model of "safety."
And for parents, a supportive environment is the source of "calmness."

Having a past where you yelled does not mean everything is over. What matters is how you recover next. Apologizing, hugging, explaining, taking a break, asking for help. Such experiences of repair also teach children the important sense that "relationships can be fixed even if they break."

Discipline is not about making children obey but guiding them to eventually manage themselves.
What is needed for that is not fear, but small adjustments repeated in a secure environment.

Source URL

Sain et Naturel "Les pratiques parentales sévères altèrent la régulation biologique du stress chez l’enfant"
Used for harsh parenting, RSA, mother-child co-regulation, research overview, researcher comments, method, and results summary.
https://sain-et-naturel.ouest-france.fr/les-pratiques-parentales-severes.html

Pennsylvania State University News: Harshly parented children show poorer development of stress regulation
Primary university announcement of research content. Confirmation of researcher names, research purpose, and the potential hindrance of children's stress regulation development by harsh parenting.
https://www.psu.edu/news/research/story/harshly-parented-children-show-poorer-development-stress-regulation

Child Development / Oxford Academic: The typical and atypical development of dynamic self-regulation and coregulation of respiratory sinus arrhythmia in mothers and children across early childhood
Original research paper. Confirmation of 129 mother-child pairs, ages 3 to 4, RSA measurement, differences due to harsh parenting, DOI, etc.
https://academic.oup.com/chidev/advance-article-abstract/doi/10.1093/chidev/aacag033/8539843

Penn State Social Science Research Institute: Harshly parented children show poorer development of stress regulation
Introduction of the same research by a university-affiliated institution. Used for confirming key points of the research, parental stress factors, and explanations of RSA inertia.
https://ssri.psu.edu/news/harshly-parented-children-show-poorer-development-stress-regulation

LinkedIn Public Post: Professor Erwin Loh “Aggressive Parenting Disrupts Child Stress Regulation”
Used for confirming the sharing status and reactions on SNS. Confirmation of research introduction post, 46 reactions, and 5 comments displayed on the public page.
https://www.linkedin.com/posts/erwinloh_harshly-parented-children-show-poorer-development-activity-7460316487312908288-HzcM

LinkedIn Public Post: Gerard Rodgers' shared post of the same research
Confirmed as an example of the research being shared on SNS. Confirmation of research introduction text and reactions displayed on the public page.
https://www.linkedin.com/posts/dr-gerard-rodgers-191a3617_countries-that-render-and-marvel-offer-it-activity-7460983960060440576-xcZc