PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Early male friendship as a precursor to substance abuse in girls

2011-03-11
(Press-News.org) Montreal, QC —March 10, 2011 —In childhood, boys and girls tend to form friendships almost exclusively with same-sex peers. Around early adolescence, they gradually begin to include other-sex friends in their network. A new study published in Journal of Research on Adolescence suggests that girls and boys experience this transition very differently. The findings show that girls tend to initiate the transition to a mixed-gender friendship network earlier than boys, and continue this transition at a faster pace during adolescence. As a result girls who experienced this transition early and fast were more likely to develop substance abuse problems during late adolescence.

Researchers followed a sample of almost 400 adolescents (58% girls), aged twelve to eighteen, from a large French-speaking school district in Canada. They were interviewed annually over a seven-year period about their friendship network and their use of alcohol and drugs.

Lead author Dr. François Poulin, "Peer relationships are considered to be one of the main risk factors for substance use. However, for boys, the formation of other-sex friendships is not associated with later substance use problems. Boys reported receiving higher levels of emotional support from their other-sex friends, whereas girls receive more support from their same-sex friends. It is possible that having other-sex friends is protective for boys because they gain emotional support and are therefore less likely to engage in problem behavior."

The study finds that among girls, antisocial behavior and early pubertal maturation accelerated the increase in the proportion of other-sex friends. Compared to their same-sex friends, girls tended to form friendships with older males in out-of-school contexts. Since the legal drinking age is 18 in Canada, it may simply be more difficult for younger girls to purchase their own alcohol, thus older boys become one point of access for this substance. The study findings imply that parents may wish to take a more active role in monitoring their daughters' friendships, especially with older boys.

The authors maintain that by middle adolescence, once this transition has been completed, the impact of other-sex friendships on girls' maladjustment fades away. Mixed-gender networks then become more normative and girls are more likely to form romantic relationships with their male peers. The influence of boys on girls' substance-using behavior might then operate in the context of these romantic relationships.

The authors suggest that future studies should also examine the longitudinal associations between other-sex friends and other outcomes such as educational achievement and antisocial behavior. Finally, aspects of these other-sex friendships in early adolescence should be more carefully investigated, including the setting in which they take place, their linkages with the rest of the youth's friendship network, and parental supervision of these new emerging relationships.

### This study is published in a forthcoming issue of Journal of Research on Adolescence. Members of the media may request a full-text version of this article by contacting scholarlynews@wiley.com.

Article: "Longitudinal Associations Between Other-Sex Friendships and Substance Use in Adolescence."; François Poulin, et. al. Journal of Research on Adolescence; Published Online: March 9, 2011 (DOI: 10.1111/j.1532-7795.2011.00736.x). Abstract: http://onlinelibrary.wiley.com/doi/10.1111/j.1532-7795.2011.00736.x/abstract

Dr. François Poulin is a Professor of Psychology at the Université du Québec à Montréal. He has published over 50 peer-reviewed publications (book chapter and articles) on children and adolescent peer relations. He can be reached for questions at poulin.francois@uqam.ca.

Multidisciplinary and international in scope, Journal of Research on Adolescence (JRA) significantly advances knowledge in the field of adolescent research. Employing a diverse array of methodologies, this compelling journal publishes original research and integrative reviews of the highest level of scholarship. Featured studies include both quantitative and qualitative methodologies applied to cognitive, physical, emotional, and social development and behavior. Articles pertinent to the variety of developmental patterns inherent throughout adolescence are featured, including cross-national and cross-cultural studies. Attention is given to normative patterns of behavior as well as individual differences rooted in personal or social and cultural factors. http://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291532-7795

About Wiley-Blackwell Wiley-Blackwell is the international scientific, technical, medical, and scholarly publishing business of John Wiley & Sons, with strengths in every major academic and professional field and partnerships with many of the world's leading societies. Wiley-Blackwell publishes nearly 1,500 peer-reviewed journals and 1,500+ new books annually in print and online, as well as databases, major reference works and laboratory protocols. For more information, please visit www.wileyblackwell.com or our new online platform, Wiley Online Library (wileyonlinelibrary.com), one of the world's most extensive multidisciplinary collections of online resources, covering life, health, social and physical sciences, and humanities.


ELSE PRESS RELEASES FROM THIS DATE:

Scientists identify molecule that can increase blood flow in vascular disease

Scientists identify molecule that can increase blood flow in vascular disease
2011-03-11
CHAPEL HILL, N.C. – Circulating through the bloodstream of every human being is a rare and powerful type of cell, one that can actually create new blood vessels to bypass blockages that cause heart attacks and peripheral artery disease. Though everyone has these cells – called endothelial progenitor cells – they are often dysfunctional in people prone to vascular disease. Now researchers at the University of North Carolina at Chapel Hill have discovered that a molecule – called Wnt1 – can improve the function of endothelial progenitor cells, increasing the blood flow ...

Referral to high-volume hospitals for operations fails to improve outcomes statewide

2011-03-11
Referring patients to hospitals that have the largest volume of surgical procedures does not necessarily lead to improved outcomes for the overall population, according to the results of a new study in the February issue of the Journal of the American College of Surgeons. The findings of studies that suggest the higher the volume of specialty surgical procedures performed at any given hospital, the better that hospital's outcomes will be, has resulted in calls for volume-based referrals. Most notably leading that call has been the Leapfrog Group's Evidence-Based Hospital ...

Syracuse University research team shapes cell behavior research

2011-03-11
A team led by James Henderson, assistant professor of biomedical and chemical engineering in Syracuse University's L.C. Smith College of Engineering and Computer Science (LCS) and researcher in the Syracuse Biomaterials Institute, has used shape memory polymers to provide greater insight into how cells sense and respond to their physical environment. Most cell biomechanics research has examined cell behavior on unchanging, flat surfaces. "Living cells are remarkably complex, dynamic and versatile systems, but the material substrates currently used to culture them are ...

A glove on your hand can change your mind

2011-03-11
Unconsciously, right-handers associate good with the right side of space and bad with the left. But this association can be rapidly changed, according to a study published online March 9, 2011 in Psychological Science, by Daniel Casasanto (Max Planck Institute for Psycholinguistics) and Evangelia Chrysikou (University of Pennsylvania). Even a few minutes of using the left hand more fluently than the right can reverse right-handers' judgments of good and bad, making them think that the left is the 'right side' of space. Conceptions of good and bad are rooted in people's ...

Lover's lane for birds found in Arctic

Lovers lane for birds found in Arctic
2011-03-11
NEW YORK (March 9, 2011) – A new study by the Wildlife Conservation Society reveals the critical importance of western Arctic Alaska's Teshekpuk Lake region to tens of thousands of birds that breed in the area during the brief, but productive arctic summers, and makes clearer the case for permanent protection of the area. Results of the four-year study—the first to look at the full suite of bird species from around the world that descend on the Teshekpuk Lake region—showed that the region contains some of the highest nesting bird densities and nest productivity across ...

Alcohol has stronger impact on gastric bypass patients, study finds

2011-03-11
Patients who have had a gastric bypass operation take longer to process alcohol, potentially leading some of them to overindulge when drinking, according to the results of a new study in the February issue of the Journal of the American College of Surgeons. Previous studies have shown that gastric bypass patients often find it difficult adjusting to physical and psychological changes after the procedure. An increased risk of depression, alcoholism, and other substance abuse issues for this patient population led researchers to take a more in-depth look at how these patients ...

New model shows importance of feet, toes in body balance

2011-03-11
COLUMBUS, Ohio – Researchers are using a new model to learn more about how toe strength can determine how far people can lean while keeping their balance. The results could help in building robotic body parts that will closely imitate human movement, and might lead to a new generation of advanced prosthetics. Hooshang Hemami, professor of electrical and computer engineering at Ohio State University built a complex computational model of the human foot to look at the role of the feet and toes in determining the body's movement and balance. Many studies concerning ...

Erectile dysfunction drug improves exercise tolerance in young people with congenital heart disease

2011-03-11
Sildenafil, a drug used to treat erectile dysfunction and pulmonary hypertension, has another possible use—helping children and young adults with congenital heart disease to better tolerate exercise. Sildenafil significantly improved measures of exercise performance during stress testing in patients with single-ventricle heart disease, according to researchers from The Children's Hospital of Philadelphia. This study was published online on March 7 in the journal Circulation. It is the first randomized, double-blind, placebo-controlled, crossover trial to evaluate the ...

Study shows exercise can curb pot use, cravings

Study shows exercise can curb pot use, cravings
2011-03-11
Vanderbilt researchers are studying heavy users of marijuana to help understand what exercise does for the brain, contributing to a field of research that uses exercise as a modality for prevention and treatment. Participants saw a significant decrease in their cravings and daily use after just a few sessions of running on the treadmill, according to a Vanderbilt study published today in the journal PLoS ONE. It is the first study to demonstrate that exercise can reduce cannabis use in persons who don't want to stop. Twelve study participants — eight female and four ...

New technology would dramatically extend battery life for mobile devices

New technology would dramatically extend battery life for mobile devices
2011-03-11
CHAMPAIGN, Ill. — Technophiles who have been dreaming of mobile devices that run longer on lighter, slimmer batteries may soon find their wish has been granted. University of Illinois engineers have developed a form of ultra-low-power digital memory that is faster and uses 100 times less energy than similar available memory. The technology could give future portable devices much longer battery life between charges. Led by electrical and computer engineering professor Eric Pop, the team will publish its results in an upcoming issue of Science magazine and online in the ...

LAST 30 PRESS RELEASES:

Scientists map brain's blood pressure control center

Acute coronary events registry provides insights into sex-specific differences

Bar-Ilan University and NVIDIA researchers improve AI’s ability to understand spatial instructions

New single-cell transcriptomic clock reveals intrinsic and systemic T cell aging in COVID-19 and HIV

Smaller fish and changing food webs – even where species numbers stay the same

Missed opportunity to protect pregnant women and newborns: Study shows low vaccination rates among expectant mothers in Norway against COVID-19 and influenza

Emotional memory region of aged brain is sensitive to processed foods

Neighborhood factors may lead to increased COPD-related emergency department visits, hospitalizations

Food insecurity impacts employees’ productivity

Prenatal infection increases risk of heavy drinking later in life

‘The munchies’ are real and could benefit those with no appetite

FAU researchers discover novel bacteria in Florida’s stranded pygmy sperm whales

DEGU debuts with better AI predictions and explanations

‘Giant superatoms’ unlock a new toolbox for quantum computers

Jeonbuk National University researchers explore metal oxide electrodes as a new frontier in electrochemical microplastic detection

Cannabis: What is the profile of adults at low risk of dependence?

Medical and materials innovations of two women engineers recognized by Sony and Nature

Blood test “clocks” predict when Alzheimer’s symptoms will start

Second pregnancy uniquely alters the female brain

Study shows low-field MRI is feasible for breast screening

Nanodevice produces continuous electricity from evaporation

Call me invasive: New evidence confirms the status of the giant Asian mantis in Europe

Scientists discover a key mechanism regulating how oxytocin is released in the mouse brain

Public and patient involvement in research is a balancing act of power

Scientists discover “bacterial constipation,” a new disease caused by gut-drying bacteria

DGIST identifies “magic blueprint” for converting carbon dioxide into resources through atom-level catalyst design

COVID-19 vaccination during pregnancy may help prevent preeclampsia

Menopausal hormone therapy not linked to increased risk of death

Chronic shortage of family doctors in England, reveals BMJ analysis

Booster jabs reduce the risks of COVID-19 deaths, study finds

[Press-News.org] Early male friendship as a precursor to substance abuse in girls