You can download this ERIC case study as a pdf in English, français, español, 한국어, Türkçe and Bahasa Indonesia. The Queensland Youth Development Research Project (YDRP) used questionnaires to explore the role of youth development programmes in the positive development of
Wendler, D., Rackoff, J. E., Emanuel, E. J., & Grady, C. (2002). Commentary: The ethics of paying for children’s participation in research. The Journal of Pediatrics, 141(2). pp. 166-171.