Sandra D. Simpkins

Characterizing and Measuring Participation in Out-of-School Time Programs Honing in on the relationship between breadth of youth activities and outcomes, San- dra Simpkins Chaput from HFRP summarizes recent developmental research examin- ing dimensions of participation in out-of-school activities.

Sherri C. Lauver, Stacey Miller, Heather B. Weiss, 2003 .

Families, Schools, and Developing Achievement-Related Motivations and Engagement.

Jacquelynne S. Eccles, Sandra D. Simpkins, Jennifer A. Fredricks, 2007 .

Development of Achievement Motivation and Engagement

Jacquelynne S. Eccles, Ulrich Schiefele, Allan Wigfield, 2015 .

The link between children's sport participation and self-esteem: Exploring the mediating role of sport self-concept

Sandra D. Simpkins, S. Simpkins, C. Slutzky, 2009 .

Similarities in Children’s and Early Adolescents’ Perceptions of Friendship Qualities Across Development, Gender, and Friendship Qualities

Sandra D. Simpkins, S. Simpkins, R. Parke, 2006 .