A Cross-Cultural Study of Adolescent Procrastination Robert M. Klassen University of Alberta Rebecca P. Ang Nanyang Technological University Wan Har Chong National Institute of Education Lindsey L. Krawchuk University of Alberta Vivien S. Huan, Isabella Y. F. Wong, and Lay See Yeo National Institute of Education In this study, we explore academic procrastination and associated motivation variables in 612 adolescents from Canada and Singapore. Few studies have explored adolescent procrastination and no previous studies have investigated adolescent procrastination using a cross-cultural framework. Singaporean adolescents reported higher levels of procrastination and lower levels of self-efficacy for self-regulation than Canadian adolescents. Males across settings re- ported higher levels of procrastination and lower levels of self-efficacy for self-regulation than females. Bivariate relationships between procrastination and the motivation variables showed similar patterns in Singapore and Canada. Multigroup structural equation modeling revealed that self-efficacy for self-regulation showed the strongest multivariate relationship with JOURNAL OF RESEARCH ON ADOLESCENCE, 19(4), 799–811 r 2009, Copyright the Author(s) Journal Compilation r 2009, Society for Research on Adolescence Requests for reprints should be sent to Robert M. Klassen, Department of Educational Psy- chology, University of Alberta, 6-102 Education North, Edmonton, AB, Canada T6G 2G5. E-mail: robert.klassen@ualberta.ca