The study of social relationships lies at the heart of the social sciences, but our understanding of the cognitive structures that support them has received little attention. This paper develops an account of the form and content of these structures, arguing that social relationships are represented by a small number of categories, rather than by dimensions as proposed by others. Taxometric analyses demonstrated that categories proposed by Fiske (1991) are truly discrete, controverting dimensional representation and one possible form of protype structure. The categories appear to combine in the specification of actually existing social relationships, and are more informative, or “basic”, then colloquial relationship categories. 
Social relationship and its role in knowledge management systems usage
The KMS has been widely implemented in organizations. However, its availability does not guarantee that employees have been willing to spend time and effort using it. We explored the use of KMS with emphasis on social relationship. Specifically, social capital theory was employed to establish the social relationship construct and its three dimensions: tie strength, shared norms, and trust. By studying a company that had implemented a KMS, we explored the dimensions of social relationship and its importance in the use of a KMS by employees. A theoretical framework was used to depict the antecedents of employee’s usage behavior. Implications for both researchers and practitioners are discussed, especially for companies expecting to exploit knowledge sharing in the Chinese business environment. 
Enhancing group recommendation by incorporating social relationship interactions
Group recommendation, which makes recommendations to a group of users instead of individuals, has become increasingly important in both the workspace and people’s social activities, such as brainstorming sessions for coworkers and social TV for family members or friends. Group recommendation is a challenging problem due to the dynamics of group memberships and diversity of group members. Previous work focused mainly on the content interests of group members and ignored the social characteristics within a group, resulting in suboptimal group recommendation performance.
In this work, we propose a group recommendation method that utilizes both social and content interests of group members. We study the key characteristics of groups and propose (1) a group consensus function that captures the social, expertise, and interest dissimilarity among multiple group members; and (2) a generic framework that automatically analyzes group characteristics and constructs the corresponding group consensus function. Detailed user studies of diverse groups demonstrate the effectiveness of the proposed techniques, and the importance of incorporating both social and content interests in group recommender systems. 
Social Relationship Attitudes of Student-athletes toward Heterosexual, Gay, and Lesbian Peers in Taiwan
This study investigated Taiwanese student-athletes’ social relationship attitudes toward heterosexual, gay, and lesbian peers in Taiwan. Participants were 192 male and 156 female heterosexual student-athletes from a sports university in Taiwan. The Social Relationship Attitudes toward Heterosexual/Gay/Lesbian Peers scales were used to measure participants’ attitudes toward their peers with different sexual orientations. The results indicate that Taiwanese heterosexual student–athletes’ social relationship attitudes toward peers are dependent on both student gender and the sexual orientation of the target. Male student-athletes’ social relationship attitudes toward gays and lesbians are more negative compared to female student-athletes across personal, societal, and moral domains. Both male and female student-athletes’ social relationship attitudes toward gays are more negative compared to their attitudes toward lesbians in the personal and societal domains. Male student-athletes indicate lower sympathy scores for gays than for lesbians. Females show no difference in their sympathy scores for peers with different sexual orientations. 
A Close Look at the Importance of Social Support on Relationship Quality and Social Commerce
Rapid development of web2 and social network sites has lead to develop an evolution in e-commerce, which is called social commerce .In social commerce consumers have opportunities to share their knowledge about products and services and create a friendly and supporting online environment. This study draw on social support and relationship quality theories considered a model to examine the relationship between social support, relationship quality and social commerce intention. In this regard, after reviewing the relevant literature, a proper research model selected as the research model. A questionnaire of 22 items adapted from previous literature applied to data collecting. Then they were conducted on two popular social network users in Iran named Facebook and Telegram. The questionnaires were distributed among 384 volunteers to fill out. Pearson correlation analysis method and partial least square were applied to test the model. The results revealed the direct relations between social support, relationship quality and social commerce intention. The research findings emphasize on the importance of social interactions in social commerce and encourage firms and sellers to adopt innovation and serve social networks in their business. 
 Haslam, N., 1994. Categories of social relationship. Cognition, 53(1), pp.59-90.
 He, W., Qiao, Q. and Wei, K.K., 2009. Social relationship and its role in knowledge management systems usage. Information & Management, 46(3), pp.175-180.
 Gartrell, M., Xing, X., Lv, Q., Beach, A., Han, R., Mishra, S. and Seada, K., 2010, November. Enhancing group recommendation by incorporating social relationship interactions. In Proceedings of the 16th ACM international conference on Supporting group work (pp. 97-106).
 Chang, T.-S., Hsu, W.-T. and Wang, T.-W. (2016) “Social Relationship Attitudes of Student-athletes toward Heterosexual, Gay, and Lesbian Peers in Taiwan”, Journal of Education, Society and Behavioural Science, 16(3), pp. 1-11. doi: 10.9734/BJESBS/2016/26239.
 Kamangarpoor, S. and Shahmoradi, B. (2017) “A Close Look at the Importance of Social Support on Relationship Quality and Social Commerce”, Journal of Economics, Management and Trade, 16(4), pp. 1-11. doi: 10.9734/BJEMT/2017/30606.