The research team, led by Abir Nagata of Hamamatsu University School of Medicine together with Rina Yamauchi of the National Center for Child Health and Development and colleagues at several other Japanese institutions, designed the study to move beyond broad statements about ‘good parenting’ and focus instead on concrete communication behaviors that parents report engaging in. Previous work had linked supportive parent–adolescent communication to better psychosocial outcomes, but the authors noted that evidence on specific practices during the COVID-19 pandemic was sparse. Their goal was to identify which, if any, of three commonly recommended practices — explaining matters in easy-to-understand words, empathizing with adolescents’ feelings, and holding family discussions — were associated with adolescents’ behavioral profiles during the pandemic’s first year.

To do this, the researchers conducted a nationwide, population-based cross-sectional survey in December 2020, using a stratified two-stage cluster sampling method designed to produce a sample representative of Japanese households. The analysis included 641 parent–adolescent pairs, with adolescents drawn from two school grades — fifth grade and eighth grade — capturing both late childhood and mid-adolescence. Each parent reported on how frequently they engaged in the three positive communication practices, while the adolescent in each pair completed the Strengths and Difficulties Questionnaire, a widely used and well-validated screening instrument that measures emotional symptoms, conduct problems, hyperactivity, peer problems, and prosocial behavior. From these responses, the team derived scores for total difficulties as well as separate internalizing difficulties, which reflect emotional distress turned inward, and externalizing difficulties, which manifest as outward behavioral problems such as acting out.

The survey revealed substantial variation in how often parents engaged in each practice. Just over 80 percent of parents — 80.3 percent — reported explaining things to their adolescent in easy-to-understand words, making this by far the most common practice. Empathizing with adolescents’ feelings was reported by 57.9 percent of parents, and 59.4 percent said they held family discussions. This variation mattered, because when the researchers ran weighted multivariable linear regression models — adjusting for demographic, household, and parental factors such as family structure and parental characteristics — the three practices showed distinct and statistically robust associations with adolescent behavioral outcomes. The use of weighted models and the population-based sampling framework strengthen the argument that these patterns reflect the broader Japanese population of families with adolescents rather than an unrepresentative convenience sample.

Explaining in easy-to-understand words was associated with lower total difficulties on the SDQ, with a regression coefficient of −1.79 and a 95 percent confidence interval spanning −3.56 to −0.03, a range that narrowly excludes zero. The same practice was also associated with lower internalizing difficulties, with a coefficient of −0.87 and a confidence interval of −1.73 to −0.01. In practical terms, adolescents whose parents took the trouble to translate complex information — pandemic rules, health risks, changes to daily routines — into language a young person could genuinely grasp tended to show fewer emotional and behavioral problems, particularly the anxiety- and mood-related difficulties that internalizing captures. During a period when adults themselves struggled to make sense of rapidly changing guidance, this capacity to communicate clearly appears to have given adolescents a firmer footing.

Empathizing with adolescents’ feelings told a somewhat different story. This practice was associated with lower total difficulties, with a coefficient of −1.69 and a confidence interval of −3.13 to −0.25, and notably with lower externalizing difficulties, with a coefficient of −1.02 and a confidence interval of −1.65 to −0.38. Externalizing problems — anger, defiance, acting out — are among the behaviors most commonly reported to spike during periods of household stress, and they often strain parent–child relationships further. The pattern observed here fits a familiar psychological account: when parents acknowledge and validate what an adolescent is feeling rather than dismissing or punishing emotional expression, the adolescent has less need to express distress through disruptive behavior. Empathy, in this framing, functions as an emotional regulator for the household as a whole.

But it was the third practice — family discussions — that produced the strongest and most consistent associations across every outcome the researchers measured. Adolescents whose parents engaged in family discussions showed lower total difficulties, with a coefficient of −2.40 and a 95 percent confidence interval of −3.62 to −1.18; lower internalizing difficulties, with a coefficient of −1.09 and a confidence interval of −1.79 to −0.39; lower externalizing difficulties, with a coefficient of −1.31 and a confidence interval of −1.98 to −0.63; and, uniquely among the three practices, higher prosocial behavior, with a coefficient of 1.08 and a confidence interval of 0.71 to 1.46. The prosocial finding is particularly striking. Prosocial behavior — the tendency to help, share, and cooperate with others — is not simply the absence of problems but a positive dimension of development that predicts later social competence and mental health. That family discussions were the only practice associated with boosting this positive trait suggests that structured opportunities for children to speak and be heard within the family may cultivate social skills that extend beyond the home.

The authors emphasize that their findings support promoting supportive parent–adolescent communication as a practical, low-cost approach to fostering adolescent well-being — both during periods of widespread disruption such as the pandemic and in ordinary family life. Unlike clinical interventions that require specialists, training, or significant expense, the three practices studied here are behaviors that most families can adopt with modest effort and no formal resources. Public health messaging during future crises, the study implies, might do well to include not just epidemiological guidance but concrete communication guidance for parents: explain what is happening in words your child can understand, acknowledge their feelings, and make space for the family to talk together regularly. The fact that these associations held even after adjusting for demographic and household factors suggests the practices carry independent weight rather than simply serving as proxies for affluent or otherwise advantaged homes.

As with all cross-sectional research, the study has limitations worth keeping in view. Because exposure and outcome were measured at the same point in time, the design cannot establish causality: it is possible that adolescents with fewer behavioral difficulties are simply easier to talk with, inviting more family discussion rather than benefiting from it. The data rely on parent-reported communication practices and adolescent-completed questionnaires, which introduces the possibility of reporting bias, and the survey captured a single moment — December 2020 — during a pandemic whose pressures evolved over time. The authors report no competing interests, and the study was conducted in accordance with the Declaration of Helsinki with written informed consent from parents and assent from adolescents, supported by grants from Japan’s Ministry of Health, Labour, and Welfare, the Japan Science and Technology Agency, and the Japan Society for the Promotion of Science, none of which influenced the design or interpretation. Even with these caveats, the consistency of the pattern — three distinct communication practices, each linked to better outcomes, with family discussions emerging as the most powerful of all — offers families and policymakers a rare commodity in adolescent mental health research: a simple, actionable finding grounded in a large, nationally representative sample. In a crisis that took so much ordinary life away from young people, the ordinary act of talking together at home appears to have given some of it back.

Subject of Research: Parental communication practices and adolescent behavioral health during the COVID-19 pandemic in Japan

Article Title: Association of parental communication practices with adolescent behavioral difficulties and prosocial behavior during the COVID-19 pandemic: a nationwide cross-sectional study in Japan

Article References: Nagata, A., Yamauchi, R., Ishitsuka, K., Morisaki, N., & Yamaoka, Y. (2026). Association of parental communication practices with adolescent behavioral difficulties and prosocial behavior during the COVID-19 pandemic: a nationwide cross-sectional study in Japan. BMC Public Health. https://doi.org/10.1186/s12889-026-29607-z

Image Credits: AI Generated

DOI: 10.1186/s12889-026-29607-z

Keywords: parent–adolescent communication, COVID-19 pandemic, adolescent mental health, prosocial behavior, family discussions, Strengths and Difficulties Questionnaire, Japan, cross-sectional study, internalizing difficulties, externalizing difficulties, behavioral difficulties, health communication

The study, conducted by a team at Jilin University’s School of Public Health and published in Social Indicators Research, analyzed 2,251 working-age participants from the Longitudinal Internet Studies for the Social Sciences panel, a probability-based internet survey in the Netherlands widely regarded as a methodological gold standard. Six waves of measurement spanning seven years allowed the researchers to model not just whether people felt lonely or anxious, but how those feelings changed over time and whether the pace of change in one predicted the course of the other. The answer, in short, was yes, and in both directions.

Technically, the team relied on a family of structural equation models known as latent growth curve models. Unconditional versions first mapped the raw trajectories of loneliness and internalizing difficulties separately, estimating each person’s starting level and their rate of change across the seven annual intervals. Parallel process versions then modeled both trajectories simultaneously, allowing the researchers to ask whether someone’s baseline loneliness shaped the slope of their anxiety and depression symptoms, and vice versa. Finally, conditional models and a parallel process latent class growth analysis grouped participants into distinct co-developmental patterns and tested how membership in each group related to subjective well-being, the scientific shorthand for how positively people evaluate their own lives.

The first headline finding is quietly optimistic: across the seven years, both loneliness and internalizing difficulties declined on average in the working-age population. This contradicts a common cultural assumption that loneliness accumulates relentlessly through adulthood. Instead, the average trajectory bends downward, echoing recent coordinated analyses of nine longitudinal studies suggesting that loneliness does not inevitably climb with age. But averages conceal as much as they reveal, and the deeper story of this study lies in the variability hiding beneath that downward trend.

That variability is where the reciprocal dynamics emerge. Higher initial levels of loneliness predicted steeper or more adverse subsequent trajectories of internalizing difficulties, and the reverse held as well: people who began the study with more depressive and anxious symptoms tended to become lonelier faster. This bidirectional coupling is consistent with theoretical accounts in which loneliness sharpens attention to social threat, making social interactions feel riskier and more taxing, which in turn deepens withdrawal and low mood. It also aligns with a growing body of cross-lagged research showing that loneliness and common mental disorders feed each other over time, creating feedback loops that can trap individuals in a slow spiral of isolation and distress. The present study extends those findings by demonstrating the coupling at the level of whole trajectories rather than single consecutive waves.

The consequences of this spiral show up clearly in subjective well-being. Participants who began the study with higher baseline loneliness or higher internalizing difficulties reported systematically lower well-being throughout. More strikingly, the rate of change mattered: people whose internalizing difficulties declined more steeply over the seven years enjoyed greater well-being than those whose symptoms lingered. In other words, how quickly someone sheds anxiety and depressive symptoms is not merely a clinical curiosity, it is a statistical predictor of how satisfied and happy they will feel, independent of where they started. This suggests that recovery pace, not just initial severity, deserves a central place in how researchers and clinicians think about adult mental health.

The latent class growth analysis added a third layer of insight by sorting participants into three distinct co-developmental profiles. A High Level-Declining Group started with elevated loneliness and internalizing difficulties but improved over time. A Rising Internalizing Difficulties Group, the most concerning of the three, began with comparatively fewer symptoms but grew worse across the seven years. A Low Level-Declining Group started low and stayed low, representing the resilient majority. Well-being differed significantly across these groups, with the rising-symptom class showing markedly poorer outcomes. The existence of this worsening subgroup is perhaps the study’s most practically important discovery, because conventional screening approaches that focus only on current symptom levels would overlook people whose trajectory is quietly heading in the wrong direction.

Why does this matter for the workforce in particular? The working-age population carries the double burden of occupational stress and the social expectations of family and community life, and previous research has linked loneliness among employed adults to reduced productivity, higher healthcare use, and poorer mental health service engagement. International reviews have documented loneliness prevalence across 113 countries, and dozens of national governments have now launched formal loneliness strategies. Yet most interventions are designed for children or retirees. By showing that loneliness and internalizing symptoms dynamically co-develop during the prime working years, and that their early levels seed later trajectories, the study argues for prevention rather than reaction: monitoring both conditions together, identifying individuals on adverse co-developmental paths early, and intervening before reciprocal reinforcement takes hold.

The technical sophistication of the analysis also deserves note. Working with ordered categorical survey measures across six waves, the authors verified longitudinal measurement invariance to ensure that the scales meant the same thing at every time point, a step that many longitudinal studies skip and one that, if ignored, can distort growth parameters. Model fit was evaluated against conventional structural equation modeling criteria, and the use of a probability-based panel mitigates the selective non-response biases that plague convenience samples. The data themselves are openly available through the LISS infrastructure, allowing other researchers to replicate or extend the findings.

Still, the study has limits that temper its conclusions. The sample is Dutch, and loneliness norms, social support structures, and labor market conditions differ across cultures, so the specific trajectory shapes may not generalize universally. Self-report measures capture perceived loneliness and symptoms rather than clinical diagnoses. And while parallel process growth models reveal how trajectories relate, they cannot on their own prove causation; unmeasured factors, from personality to economic shocks, could partially drive both paths. Even so, the reciprocal pattern is difficult to explain without some genuine mutual influence, and it converges with experimental and neuroimaging work showing that perceived social isolation alters cognition and threat sensitivity in ways that plausibly feed internalizing symptoms.

The broader takeaway is a reframing of two familiar problems into one intertwined process. Loneliness is not simply an unhappy byproduct of poor mental health, and depression and anxiety are not merely consequences of being alone. Over years of adult life, the two develop as a coupled system, each shaping the slope of the other, and together they determine how positively people judge their own lives. For a society grappling with an aging workforce, post-pandemic social disruption, and rising policy attention to social connection, the message from seven years of Dutch panel data is clear: to protect well-being during the working years, treat loneliness and internalizing difficulties as two faces of a single, trackable, and treatable trajectory.

Subject of Research: Longitudinal co-development of loneliness and internalizing difficulties and their impact on subjective well-being in the working-age population

Article Title: How Do Loneliness and Internalizing Difficulties Change Subjective Well-Being?—A Trajectory Study of the Working-Age Population

Article References: Zhang, C., Yuan, T., Cui, Y., Zheng, C., Qing, Y., Liu, K., Pan, L., Zhang, L., Su, Y., Ding, F., & Mei, S. (2026). How Do Loneliness and Internalizing Difficulties Change Subjective Well-Being?—A Trajectory Study of the Working-Age Population. Social Indicators Research, 184(2), Article 43. https://doi.org/10.1007/s11205-026-03925-6

Image Credits: AI Generated

DOI: 10.1007/s11205-026-03925-6

Keywords: loneliness, internalizing difficulties, subjective well-being, latent growth curve models, LISS panel, working-age population, depression, anxiety, developmental trajectories, mental health, longitudinal study, Netherlands