The research was led by Kaylin Hill, an assistant professor in Notre Dame’s Department of Psychology and a clinical psychologist who directs the university’s Psychophysiology of Affect across the Lifespan, or PAL, Lab. Hill is also a faculty affiliate of the Shaw Center for Children and Families and the Eck Institute for Global Health, and much of her career has been devoted to a single deceptively simple question: what makes some people vulnerable to depression while others remain resilient? Her team’s latest work addresses that question by connecting two threads that had rarely been woven together in a single longitudinal design, namely observed parenting behavior in toddlerhood and the long-term development of neural reward responsiveness.

The stakes of the question are considerable. Data from the National Alliance on Mental Illness indicate that more than one in five adults in the United States experiences mental illness in any given year, and that more than one in seven young people between the ages of six and seventeen lives with a mental health disorder. The timing of onset is striking: half of all lifetime mental illness begins by age fourteen, and three quarters by age twenty-four. Any factor that can be identified early, and potentially modified, therefore carries enormous public health significance. Parenting behavior, unlike genetic inheritance, is something that can in principle be changed, which is precisely why Hill and her colleagues consider the new findings so promising.

To trace the connection between early experience and later brain function, the researchers relied on a longitudinal study spanning fifteen years and involving 465 young people and their parents, carried out at Stony Brook University in New York and supported by a grant from the National Institute of Mental Health. When the children were three years old, trained observers watched one-on-one interactions between each child and parent in a laboratory setting and systematically coded what they saw. Positive parenting behaviors included displays of warmth, support, and encouragement, while negative parenting behaviors included harshness, heavy-handedness, and excessive intrusiveness. These coded observations then became the baseline against which each child’s later brain development was measured.

The measurement tool was the electroencephalogram, or EEG, a noninvasive technique in which small electrodes attached to the scalp through a cap record the brain’s electrical activity with millisecond-level precision. Beginning at age nine, and again at ages twelve, fifteen, and eighteen, each participant completed a reward task while EEG data were collected. The task was a guessing game in which winning was rewarded with money, allowing the researchers to compare the brain’s electrical signals immediately after a win with those after a loss. The difference between those two signals provides an index of reward responsiveness, one of the largest neural indicators of risk for mental health concerns currently known, as Hill describes it. Because the EEG paradigm is adaptable across a wide range of abilities and cognitive stages, the same measure could be tracked repeatedly across the entire arc of adolescence.

Reward processing, the brain’s capacity to register and respond to positive stimuli, is not a luxury of experience. Previous research has shown that adequate reward processing is necessary for adolescents and adults to feel joy, excitement, and pleasure, and that the foundations of this capacity are visible even in early childhood. When reward responsiveness is blunted, a condition researchers describe as blunted reward sensitivity, individuals tend to experience less pleasure from everyday positive events, a hallmark feature associated with depression. Hill emphasized that reward processing appears to be one piece of the puzzle of what may put a person at risk for developing mental disorders, and that being able to observe how it develops from ages nine to eighteen is genuinely informative for understanding depression risk.

The results of the fifteen-year follow-up were strikingly consistent. Children whose parents had displayed higher levels of positive parenting at age three showed larger neural reward responses to winning the guessing game across adolescence, in effect getting more excited, at the level of brain electrical activity, about positive outcomes. Children raised with more negative parenting styles showed the opposite pattern, responding with less enthusiasm to the same rewards. In Hill’s summary, the more positive and the less negative the parenting behaviors observed at age three, the larger the brain’s reward response seemed to be for individuals across adolescence. The study is, according to the researchers, the first of its kind to measure which early life experiences are associated with reward processing from childhood through late adolescence and early adulthood.

The interpretation Hill and her team offer is that positive parenting in the early years may function as a kind of instruction manual for the developing brain, teaching it how to respond to good things such as fun activities, friendships, success, and well-being. Praise and affirmation from parents, delivered consistently during the preschool period, appear to help children become better at recognizing the joyful elements of life. Conversely, when a parent is particularly harsh or intrusive, the child’s brain may develop a low reward response, a diminished capacity to experience pleasure and happiness that can subsequently open the door to sadness and despondency. Experiencing positive parenting, Hill noted, seems to help facilitate reward processing, which is important for promoting both physical and mental health.

It is important to note that the study was observational, meaning it documents associations between parenting behavior and brain development rather than proving direct causation. Hill acknowledges this limitation but argues that the design still yields important clues about how experiences and development may unfold over time. Current research indicates that the most reliable and prominent predictor of depression is a family history of the disorder combined with the experience of a stressful life event. What the new findings add is a plausible mechanism, rooted in observable behavior and measurable brain function, by which risk might be transmitted within families, and one that is far more open to modification than genetics.

That openness to intervention is where Hill sees the greatest promise. She argues that support may need to include parents and children together, and that it is critical to support parents, perhaps even before a child is born, as well as children and adolescents, in order to address the full sequence running from parent behaviors observed at age three to child development through age eighteen. Behaviors, she points out, are far more open to intervention than a genetic explanation of what drives risk within families. She and her team hope the work can inform a broader conversation about preventing depression, one of the most prevalent and debilitating mental disorders, by pulling together a single strand, one explanation among likely many, of what puts someone at risk and how that risk might be interrupted before it takes hold.

Subject of Research: The association between early parenting behaviors and the development of neural reward responsiveness in children and adolescents

Article Title: Study finds positive parenting teaches children how to experience joy—and could lead to better mental health

Article References: Study finds positive parenting teaches children how to experience joy—and could lead to better mental health. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: positive parenting, reward processing, adolescence, depression risk, EEG, neural reward responsiveness, child development, mental health, longitudinal study, parent-child interaction, Communications Psychology, early intervention

To understand why the findings matter, it helps to know how researchers classify childhood difficulties. Psychologists generally group children’s behavioral and emotional problems into two broad dimensions. Internalizing behaviors are directed inward and include withdrawal, anxiety, and depression, often manifesting as quiet suffering that can escape a parent’s or teacher’s notice. Externalizing behaviors are directed outward and include aggression, oppositional behavior, and attention problems, which tend to be more visible in classrooms and at home. Both dimensions are considered important indicators of a child’s mental health, and both can shape long-term outcomes in school, relationships, and adult wellbeing. The ECHO study set out to ask a deceptively simple question: do the everyday habits of parenting, viewed together rather than one at a time, track with these two dimensions of child adjustment?

The research team approached the question with a method that differs from much of the earlier literature. Rather than examining a single parenting behavior in isolation, such as warmth or discipline alone, the researchers used data-driven techniques to identify profiles, which are combinations of parenting practices that tend to occur together in real families. This approach acknowledges something that parents know intuitively: parenting is not a single dial but a cluster of behaviors, including warmth, responsiveness, supervision, and consistency, that operate simultaneously. By grouping families according to their overall pattern of practices, the researchers could ask whether the combination matters over and above any single ingredient.

From the survey responses collected across the ECHO cohort, three parenting profiles emerged. The first was characterized by high positive parenting along with better supervision. In this context, positive parenting describes warm, responsive caregiving, the kind of parenting that involves praising good behavior and engaging supportively with the child on a daily basis. The second profile combined lower positive parenting with medium supervision, and the third combined medium positive parenting with poorer supervision. The researchers are careful to note that these three profiles do not capture the full spectrum of parenting approaches that exist across families. Even so, the range they span allowed the team to analyze the effects of positive parenting and the level of supervision together, rather than treating them as separate and unrelated phenomena.

The pattern in the children’s outcomes was striking in its consistency. Externalizing and internalizing behaviors were lowest among children whose parents fit the high positive parenting with better supervision profile. These behaviors were more common among children in the lower positive parenting with medium supervision group, and they were highest among children in the medium positive parenting with poorer supervision profile. In other words, the combination of warmth and close monitoring appeared to go hand in hand with the fewest reported difficulties, while the profile marked by weaker supervision was associated with the most. Because the study is observational, it cannot prove that parenting caused these differences, but the graded pattern across profiles suggests a meaningful association that warrants attention from both researchers and practitioners.

The team did not stop at profiles. In a separate set of analyses, they examined each parenting behavior individually, independent of the broader profile to which a family belonged. This dimension-level analysis produced two notable findings. First, inconsistent discipline, which reflects how unpredictably parents enforced rules, was linked to both more internalizing and more externalizing problems, and this association held regardless of the family’s broader parenting profile. Unpredictability in rule enforcement, the results suggest, may be a particularly consequential feature of the home environment, one that children experience as destabilizing whether or not their parents are otherwise warm and engaged. Second, poor supervision, when examined on its own, was linked specifically to more externalizing problems such as aggression and attention difficulties, but it was not significantly linked to internalizing problems like anxiety and depression. This dissociation hints that different parenting shortfalls may reach different corners of a child’s emotional life.

The authors of the study summarized the takeaway in their own words. In a large, diverse sample of children across the United States, they found that certain patterns of parenting, not just individual behaviors, matter for children’s emotional and behavioral wellbeing. Children tended to have fewer emotional and behavioral problems when parents were consistently positive, provided steady discipline, and stayed closely engaged in their day-to-day lives. The authors described the result as a reminder that small, everyday parenting behaviors can add up to meaningful differences for children. That framing is significant because it shifts the focus away from dramatic parenting failures and toward the cumulative weight of ordinary routines, such as how predictably rules are enforced and how closely parents track their children’s activities and companions.

Like all studies, this one has boundaries that shape how its findings should be interpreted. The data are based on self-report, and the respondents were overwhelmingly mothers, with only 52 fathers participating in the survey. Other family members or community figures involved in the children’s upbringing were not included, which means the picture of each child’s rearing environment is necessarily partial. The researchers also captured only a snapshot of the current parent-child relationship rather than following families over time. That cross-sectional design makes it difficult to establish cause and effect, because parenting tactics and child behavior can develop and change in response to one another. A child who struggles with attention or aggression may elicit harsher or more inconsistent discipline, just as inconsistent discipline may worsen those same behaviors. Disentangling these directions of influence will require longitudinal designs that follow families across years.

Despite those limitations, the scale and diversity of the ECHO sample give the findings considerable weight. The ECHO Program is one of the most ambitious child health research efforts ever mounted in the United States, and the study’s cohort of more than 2,700 children spans a wide range of family backgrounds. The research was supported by numerous awards from the National Institutes of Health, and the authors declared no competing interests. The statistical analyses for publication were performed by the study statistician independently of the sponsor, and the sponsor did not review or approve the manuscript for submission, safeguards that strengthen confidence in the reported results.

For parents, the practical message is less about perfection and more about consistency and presence. The profiles associated with the fewest child difficulties combined warmth, responsiveness, steady and predictable discipline, and close day-to-day engagement. None of these requires extraordinary resources; they are ordinary behaviors repeated often enough to become the texture of family life. For clinicians, educators, and policymakers, the study adds to a growing body of evidence that parenting interventions aimed at consistency and supervision, rather than warmth alone, may be especially valuable for reducing children’s behavioral problems. And for researchers, the profile-based approach offers a template for future work: the next step is to track these parenting patterns over time and test whether changing them changes children’s trajectories. The full study, Parenting profiles and dimensions in relation to children’s internalizing and externalizing behaviors in the ECHO program, is freely available in PLOS One for readers who want to examine the methods and results in detail.

Subject of Research: Associations between parenting profiles and children's internalizing and externalizing behaviors

Article Title: How parenting profiles are associated with children's behavioral and emotional problems

Article References: How parenting profiles are associated with children's behavioral and emotional problems. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: parenting, child behavior, internalizing behaviors, externalizing behaviors, ECHO Program, PLOS One, supervision, inconsistent discipline, positive parenting, mental health, NIH, developmental psychology