Alfermann D. / 2000 / Effects of physical exercise on self-concept and well being / International Journal of Sport Psychology 30 : 47 ~ 65 Baldwin, M. K. / 1997 / Exercise and self-esteem in breast cancer survivors: An application of the exercise and self-esteem model / Journal of Sport & Exercise Psycholog Byrne, B. M. / 1984 / The general academic self-concept normological network : A review of construct validation research / Review of Educational Research 54 : 427 ~ 456 Cohen, J. / 1988 / Statistical power analysis for the behavioral sciences / Lawrence Erlbaum Associates Ebbeck, V. / 2003 / Explaining the self-conception of perceived conduct using indicators of moral functioning in physical education / Research Quarterly for Exercise and Spo