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 The study only included 88 participants at one point in time, so it
can’t indicate whether changes in Facebook metrics cause an increase
in stress, or vice versa.
Other important external factors are also responsible for cortisol
levels, but Facebook involvement may have its own effect, senior
author Sonia Lupien of Montreal Mental Health University Institute
said in a statement.
"We were able to show that beyond 300 Facebook friends, adolescents
showed higher cortisol levels; we can therefore imagine that those
who have 1,000 or 2,000 friends on Facebook may be subjected to even
greater stress,” she said.
The 88 teens in the study, age 12 to 17, answered questions about
their Facebook use frequency, number of friends, self-promoting
behavior and supporting behavior of friends. The researchers
measured the teens’ cortisol levels four times a day for three days.
Kids who had more than 300 Facebook friends tended to have higher
cortisol levels than those with fewer friends, the researchers
reported in Psychoneuroendocrinology.
With more peer interaction on Facebook, however, cortisol levels
tended to be lower. Neither depression nor self-esteem were related
to cortisol levels.
Cortisol levels in early adolescence may influence risk of
depression years later, the authors wrote.
Wenhong Chen of the department of Radio-TV-Film and the department
of Sociology at the University of Texas at Austin, who was not part
of the new study, points out that the research is about Facebook,
and so the findings can’t necessarily be generalized to other forms
of social media use.
It may also not be generalizable to other age groups, Chen said.
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“The preliminary nature of our findings will require refined
measurement of Facebook behaviors in relation to physiological
functioning and we will need to undertake future studies to
determine whether these effects exist in younger children and
adults,” Lupien said. “Developmental analysis could also reveal
whether virtual stress is indeed ‘getting over the screen and under
the skin’ to modulate neurobiological processes related to
adaptation.”
Offline friend network size was also related to cortisol levels.
“It may not be about the number of friends either online or offline,
it may be more about potential communication overload,” Chen told
Reuters Health by email.
Larger networks may mean more peers and more drama, she said.
Rather than using the overall number of friends online or offline it
may be more revealing to examine network composition, strong ties
and weak ties, as well as individuals’ position in their networks,
she said.
SOURCE: http://bit.ly/1RgOOuc Psychoneuroendocrinology, online
October 9, 2015.
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