Procedures
During the screening stage, 575 students interested in participating were invited by the first author to complete a short questionnaire to confirm their eligibility in the auditoriums at the schools. This took place on two separate weekdays during moral education class where students were engaged in non-academic activities (e.g., students watched news on TV or head teachers discussed daily affairs of the class). The participant information sheets were handed out to students to read information about the study, and they were given a chance to ask questions. After screening, 35 students were deemed ineligible (see 