1. Institute of Education, National Sun Yat-sen University, 70 Lien Hai Road, Kaohsiung 804, Taiwan
2. Centre for General Education, Kaohsiung Medical University, Kaohsiung, Taiwan
3. Centre for General Education, National Sun Yat-sen University and Kaohsiung Medical University, 70 Lien Hai Road, Kaohsiung 804, Taiwan