2010年3月11-13日美国青少年研究会（ the Society for Research on Adolescence）在PHILADELPHIA举行年会。会议邀请信如下：

To Whom It May Concern:
We are pleased to invite Yunfeng He to attend the 2010 Society for Research on Adolescence (SRA) Biennial Meeting in Philadelphia, Pennsylvania, USA, to be held March 11-13, 2010, at the Philadelphia Marriott Downtown Hotel. Information about this person’s accepted presentation appears below.

Saturday, March 13, 12:00 pm - 1:45 pm (Independence Ballroom Salon III)

Contextual Perspectives on Loneliness and Belongingness in Early, Middle, and Late Adolescence (Paper Symposium)

Chair 1: Steven R. Asher
Chair 2: Molly Stroud Weeks
Discussant 1: Duane Buhrmester
Paper 1: Loneliness in Urban, Rural, and Migrant Adolescents in China
Author 1: Xinyin Chen
Author 2: Dan Li
Author 3: Bin-Bin Chen
Author 4: Yunfeng He
Paper 2: School Climate Among Adolescents: The Power of Belonging
Author 1: Shelley C. Hymel
Author 2: Chiaki Konishi
Author 3: Terry Waterhouse
Author 4: Amy Prevost
Paper 3: Loneliness and Belongingness in the College Context: Distinct Emotional Experiences or Two Sides of the Same Coin?
Author 1: Steven R. Asher
Author 2: Molly Stroud Weeks
Author 3: Kristina L. McDonald
The meeting sessions will begin on Thursday, March 11 at 8:00 AM and end on Saturday, March 13 at 5:45 PM. Many pre-meeting events are planned for Wednesday afternoon, beginning at 1:00 PM, including three invited methodology workshops. The 2010 Biennial Meeting Program will be available on the SRA website by mid January 2010 (http://www.s-r-a.org). Scholars from around the globe represent many disciplines in adolescent development, promising a diverse and intellectually stimulating meeting.

SRA is an academic society focused on the theoretical, empirical, and policy research issues of adolescence. Through its biennial meetings and publishing efforts, SRA promotes the dissemination of research on adolescents and serves as a network and forum for its members.
The mission of the Society is to: (a) Foster high quality scholarship on adolescence; (b) Encourage and foster global exchange and collaboration among adolescent researchers from diverse disciplines; (c) Foster development of scholars and leaders in and entry into the study of adolescence; (d) Provide professional development, networking opportunities, and leadership experience; (e) Support research on underrepresented groups and research that encompasses the diverse contexts of adolescent development; (f) Promote the effective use of research to enhance adolescent well being. SRA currently serves over 1,200 members representing 30 countries throughout the world. The Society is governed by its Executive Council according to a constitution and by-laws.
We respectfully request that Yunfeng He be permitted to travel to the United States to attend this academic conference in Philadelphia, Pennsylvania, March 11-13, 2010. Should you require additional information, please contact Thelma Tucker (email: tetucker@s-r-a.org; Tel: +1 734-926-0612; Fax: +1 734-926-0700).

Sincerely,

Stephen T. Russell and Marcela Raffaelli
2010 Program Co-Chairs