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Child Psychology

The Widening Gender Gap in Teenage Depression: London vs. Tokyo

Research has tracked depressive symptoms in 7100 young people from Tokyo and London and shown girls have more depressive symptoms than boys in both cities. The study found that this gap is around twice as large in London and the year-on-year rise in depressive symptoms is around four times steeper for teenage girls in London than for teenage girls in Tokyo.

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The study, published in The Lancet Child & Adolescent Health, reveals a stark contrast in the prevalence of teenage depression between London and Tokyo. By comparing large cohorts of 11- to 16-year-olds from both cities over time, researchers found that the gender gap in depressive symptoms is twice as large in London than in Tokyo.

In both groups, there was a noticeable difference between boys and girls in terms of average depressive symptom levels, with this disparity widening year-on-year. The London sample showed an earlier emergence of the gender difference (at 11-12 years), whereas it appeared later in the Tokyo sample (between 11 and 14 years). Notably, the rate of change in depressive symptoms per year in London girls was around four times greater than among their Tokyo counterparts.

By age 16, the disparity in depressive symptoms between boys and girls in London had grown to be roughly twice as large as that observed in Tokyo. Interestingly, while teenage boys in Tokyo showed a decline in depressive symptoms between ages 11 and 16, those in London experienced an increase, mirroring the trajectory of teenage girls in Tokyo.

Lead author Dr. Gemma Knowles emphasized the need to reevaluate popular narratives around gender differences in mental health, citing the complexity of social influences at play. She noted that insights from young co-researchers suggested that teenage girls may assume adult roles and responsibilities at a younger age in London, while lower levels of violence and crime contribute to Tokyo’s distinct environment.

The study also highlighted the importance of understanding how social experiences interplay with physical development during adolescence, particularly for girls who may face unique challenges. The researchers acknowledged the limitations of their measures but found no evidence that scores from the Short Mood and Feelings Questionnaire (SMFQ) were incomparable across genders, ages, or contexts.

The study received funding from various institutions, including the Tokyo Metropolitan Institute of Medical Science, the Economic and Social Research Council, and the European Research Council.

Artificial Intelligence

Safeguarding Adolescents in a Digital Age: Experts Urge Developers to Protect Young Users from AI Risks

The effects of artificial intelligence on adolescents are nuanced and complex, according to a new report that calls on developers to prioritize features that protect young people from exploitation, manipulation and the erosion of real-world relationships.

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The American Psychological Association (APA) has released a report calling for developers to prioritize features that protect adolescents from exploitation, manipulation, and erosion of real-world relationships in the age of artificial intelligence (AI). The report, “Artificial Intelligence and Adolescent Well-being: An APA Health Advisory,” warns against repeating the mistakes made with social media and urges stakeholders to ensure youth safety is considered early in AI development.

The APA expert advisory panel notes that adolescence is a complex period of brain development, spanning ages 10-25. During this time, age is not a foolproof marker for maturity or psychological competence. The report emphasizes the need for special safeguards aimed at younger users.

“We urge all stakeholders to ensure youth safety is considered relatively early in the evolution of AI,” said APA Chief of Psychology Mitch Prinstein, PhD. “AI offers new efficiencies and opportunities, yet its deeper integration into daily life requires careful consideration to ensure that AI tools are safe, especially for adolescents.”

The report makes several recommendations to make certain that adolescents can use AI safely:

1. Healthy boundaries with simulated human relationships: Ensure that adolescents understand the difference between interactions with humans and chatbots.
2. Age-appropriate defaults in privacy settings, interaction limits, and content: Implement transparency, human oversight, support, and rigorous testing to safeguard adolescents’ online experiences.
3. Encourage uses of AI that promote healthy development: Assist students in brainstorming, creating, summarizing, and synthesizing information while acknowledging AI’s limitations.
4. Limit access to and engagement with harmful and inaccurate content: Build protections to prevent adolescents from exposure to damaging material.
5. Protect adolescents’ data privacy and likenesses: Limit the use of adolescents’ data for targeted advertising and sale to third parties.

The report also calls for comprehensive AI literacy education, integrating it into core curricula and developing national and state guidelines for literacy education.

Additional Resources:

* Report:
* Guidance for parents on AI and keeping teens safe: [APA.org](http://APA.org)
* Resources for teens on AI literacy: [APA.org](http://APA.org)

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Breastfeeding

Singing to Babies Boosts Their Mood and Improves Quality of Life

Singing to your infant can significantly boost the baby’s mood, according to a recent study. Around the world and across cultures, singing to babies seems to come instinctively to caregivers. Now, new findings support that singing is an easy, safe, and free way to help improve the mental well-being of infants. Because improved mood in infancy is associated with a greater quality of life for both parents and babies, this in turn has benefits for the health of the entire family, the researchers say. The study also helps explain why musical behaviors may have evolved in parents.

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The study published in Child Development found that singing to infants can significantly boost their mood. This is according to researchers at Yale University’s Child Study Center, who conducted an experiment where parents were encouraged to sing more frequently to their babies. The results showed a measurable improvement in infants’ moods overall, compared to those in the control group.

The study included 110 parents and their babies, most of whom were under four months old. Parents were randomly assigned into two groups: one group received encouragement to sing more frequently by teaching them new songs, providing karaoke-style instructional videos, and sending weekly newsletters with ideas for incorporating music into daily routines. For four weeks, these parents received surveys on their smartphones at random times throughout the day.

The researchers found that parents were successfully able to increase the amount of time they spent singing to their babies. Not only did the parents sing more frequently, but they also chose to use music especially in one context: calming their infants when they were fussy.

“This simple practice can lead to real health benefits for babies,” said Eun Cho, postdoctoral researcher at the Yale Child Study Center and co-first author of the study. “We show that singing is something that anyone can do, and most families are already doing.”

The researchers believe that the benefits of singing may be even stronger than the current study shows, especially in a family that does not already rely on music as a way of soothing their infants.

A follow-up study, “Together We Grow,” will investigate the impact of infant-directed singing over an eight-month period. The Child Study Center researchers are currently enrolling parents and babies under four months old in this study to further explore the benefits of singing.

The findings have implications for alleviating stress or conditions such as postpartum depression in the long term, and may also show benefits beyond mood in infants, such as improved sleep.

As Samuel Mehr, an adjunct associate professor at the Child Study Center and director of The Music Lab, said, “Our understanding of the evolutionary functions of music points to a role of music in communication. Parents send babies a clear signal in their lullabies: I’m close by, I hear you, I’m looking out for you — so things can’t be all that bad.”

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Child Development

The Power of Motherly Love: How Childhood Affection Shapes Teen Health

Parental warmth and affection in early childhood can have life-long physical and mental health benefits for children, and new research points to an important underlying process: children’s sense of social safety.

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The bond between a child and their caregiver is the foundation upon which a lifetime of emotional and physical well-being is built. A new study published in JAMA Psychiatry has revealed that the warmth and affection shown by mothers to their children in early childhood can have a profound impact on their mental and physical health as they grow into teenagers.

Researchers from UCLA Health followed over 8,500 children as part of the Millennium Cohort Study in the United Kingdom. At age 3, independent evaluators assessed the mother’s warmth (praise, positive tone of voice) and harshness (physically restraining or grabbing the child). The same children were then asked about their perceptions of social safety at age 14. This included questions such as “Do I have family and friends who help me feel safe, secure, and happy?” At age 17, the participants reported on their overall physical health, psychiatric problems, and psychological distress.

The study found that maternal warmth at age 3 was strongly associated with more positive perceptions of social safety at age 14. This, in turn, predicted better physical and mental health outcomes at age 17. The researchers discovered that this relationship was not only significant but also influenced by the mother’s warmth rather than her harshness.

Dr. Jenna Alley, lead author of the study, explained that children who experience more maternal warmth tend to develop a positive view of the social world. This perspective is shaped by their early experiences and influences how they interpret, organize, and make predictions about social situations and relationships. In essence, a child’s “social safety schema” becomes their lens for viewing every interaction.

Dr. George Slavich, senior author of the study, noted that the findings have important implications for interventions and public health campaigns designed to enhance resilience across the lifespan. By focusing on enhancing a teenager’s sense of social safety, rather than just reducing perceptions of harshness, we can potentially have a positive impact on their health outcomes for years to come.

The study highlights the importance of early childhood experiences in shaping our perception of the world and ourselves. While it may not be possible to change past experiences, this research suggests that focusing on enhancing warmth and safety can greatly improve lives.

Additional studies are needed to determine how maternal warmth affects children in other contexts outside the United Kingdom and to explore ways in which healthcare providers and policymakers can use these findings to develop better interventions and public health campaigns.

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