0111 GMT December 12, 2019
The Australian research, published in the International Journal of Eating Disorders (Wiley), found platforms with a strong focus on image posting and viewing such as Instagram and Snapchat are the most used and the most risky, eurekalert.org reported.
Flinders and University of Western Australia researchers surveyed 996 Year 7 and 8 'middle school' adolescents on their use of Instagram, Facebook, Tumblr and Snapchat.
Behaviors related to eating disorder were reported by 51.7 percent of girls, and 45 percent of the boys, with strict exercise and meal skipping to lose weight or prevent weight-gain being the most common.
A total of 75.4 percent of girls and 69.9 percent of boys had at least one social media account, with Instagram the most common. This was despite half the sample being younger than 13-years-old, the recommended minimum age for these platforms.
The more social media accounts, and greater time spent using them, were associated with a higher likelihood of disordered-eating thoughts and behaviors, said lead author Dr. Simon Wilksch, a senior research fellow in psychology at Flinders University.
The study is believed to be the first to examine the relationship between specific social media platforms and disordered-eating behaviors and thoughts in young adolescents.
Wilksch believes the findings are cause for concern.
"A key component of preventing eating disorders is to give the message that our self-worth should be defined by a mix of our abilities, values and relationships," he says.
"Social media seems to encourage young people to focus strongly on their appearance and the way it is judged or perceived by others.
"To find these clear associations between disordered eating and social media use in young adolescent girls and boys suggests that much more needs to be done to increase resilience in young people to become less adversely impacted by social media pressures," said Wilksch, who is launching an Australia-wide trial of Media Smart Online program designed to combat such pressures in people of any gender aged between 13 and 25 years old.
The program is backed by positive findings from the first trial with 18-25-year-old women where Media Smart Online reduced eating disorder onset by 66 percent (in those not meeting diagnosis at study start point) and increased eating disorder recovery by 75 percent (for those starting with disordered eating), relative to controls.
A range of other risk factors also improved along with lowering the likelihood of onset of depressive symptoms and thoughts about self-harm.
"We were very pleased with the outcomes of the first trial, and are excited to expand the program to a wider age range and people of any gender in this new research, since we know these concerns are not limited to females."
A key message of the program is for young people to "make up their own mind" on what relationship they want to have with social media and how their media use fits with their personal values.