Perceived Cohesion Scale
Perceived Cohesion Scale (PCS) is a six item scale that is used to measure structural cohesion in groups. In 1990, Bollen and Hoyle used the PCS and applied it to a study of large groups which were used to assess the Wikipedia:psychometric qualities of their scale.
Kenneth A. Bollen and Rick H. Hoyle. 1990. Perceived Cohesion: A Conceptual and Empirical Examination. Social Forces Vol. 69, No. 2 (Dec., 1990), pp. 479-504 use of SEM-based confirmatory factor analysis.
Chin, Wynne W., et al. Perceived Cohesion: A Conceptual and Empirical Examination: Adapting and Testing the Perceived Cohesion Scale in a Small-Group Setting. 1999. Small Group Research 30(6):751-766.
2003 Structural Cohesion and Embeddedness: A Hierarchical Conception of Social Groups. (J. Moody, drw) American Sociological Review 68(1):1-25. 2004 Outstanding Article Award in Mathematical Sociology. American Sociological Association. http://www2.asanet.org/journals/ASRFeb03MoodyWhite.pdf