7Clark J V,Arkowitz H.Social anxiety and self-evaluation of interpersonal performance. Psychological Reports . 1975
8Robert J.Coplan,MandanaArmer.A “Multitude” of Solitude: A Closer Look at Social Withdrawal and Nonsocial Play in Early Childhood[J]. Child Development Perspectives . 2007 (1)
10[3]MacKinnon D P, Lockwood C M, Hoffman J M, West S G, Sheets V. A Comparison of methods to test mediation and other intervening variable effects. Psychological Methods, 2002, 7(1): 83~104