A questionnaire from WHO and HBSC (hbsc.org) was employed in the research. The questionnaire was administered for Icelandic school children in 6 th, 8 th and 10 th grade in elementary school in the years between 2013 and 2014.
Í niðurstöðum var notast við könnun WHO og HBSC (hbsc.org) þar sem lagðar voru spurningar fyrir íslensk skólabörn í 6.-, 8.-og 10. bekk í grunnskóla árið 2013-2014.