Most of the younger participants, ages 17-20, were in their last year of secondary school in three schools, two in Copenhagen in the eastern part of Denmark and one in Aalborg in the western part. These participants completed the
questionnaire during a portion of a class period. Copenhagen is the largest city in Denmark, with a metropolitan population of about one million persons. Aalborg is a medium-sized city of about 200,000 persons. Of the two schools in Copenhagen, one
was a gymnasium , and the other was a handelskole, , which provides training in commercial professions such as bookkeeping, marketing, and running a small business. The Aalborg school was a gymnasium .