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2009
. 2009. “Academic competence for adolescents who bully and who are bullied: Findings from the 4-H study of positive youth development”. Journal of Early Adolescence 29(6): 862. doi: https://doi.org/10.1177/0272431609332667
. 2009. “More than child's play: Variable-and pattern-centered approaches for examining effects of sports participation on youth development”. Developmental Psychology 45(2): 368–382. doi: https://doi.org/10.1037/a0014577
2008
. 2008. “Out-of-school time activity participation, school enrichment and positive youth development: Findings from the 4-H Study of Positive Youth Development”. Journal of Youth Development 3(3). doi: https://doi.org/10.5195/jyd.2008.284
. 2008. “The positive development of youth: Report of the findings from the first four years of the 4-H study of positive youth development”. Medford, MA: Tufts University Office of Publications. https://4h.ucanr.edu/files/13700.pdf
2007
. 2007. “Using positive youth development to predict contribution and risk behaviors in early adolescence: Findings from the first two waves of the 4-H Study of Positive Youth Development”. International Journal of Behavioral Development 31(3): 263-273. doi: https://doi.org/10.1177/0165025407076439
2006
. 2006. “Cacophony and change in youth after school activities: Findings from the 4-H study of positive youth development”. Journal of Youth Development 1(1). doi: https://doi.org/10.5195/jyd.2006.394
. 2006. “Quantitative and qualitative assessments of thriving and contribution in early adolescence: Findings from the 4-H Study of Positive Youth Development”. Journal of Youth Development 1(2). doi: 10.5195/jyd.2006.383
