Data were collected between July–December 2007 using a child and parent
questionnaire in addition to other measures (not reported here). Test–retest reliability
(1 week) of survey itemswas assessed (4 schools; n=160 10–12 yearolds;
n = 101 parents), and items with acceptable reliability (i.e., kappa or
intraclass correlation coefficient [ICC] ≥0.6 or percent agreement ≥60%) were
included in the final survey (not reported here) .