2.3. Procedure
A pilot studywas conducted with a group of 25 children to make
sure that there were no comprehension problems and that the time
needed to collect the datawas not longer than the time given by the
camps’ organizers. Authorizations were obtained from the camps’
organizers and one of the authors collected the data on the first and
last day of each camp. Children were divided into groups of 20e25
participants and they filled out the questionnaire in the dining
place. The questions were read aloud twice in order to avoid
reading comprehension problems and it took an average of 30 min
to collect the data with each group. Doubts were solved when
required.