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1. Lin Freeman, Sue Freeman & Alaina Michelson had a great article decades 
ago that people perceive "groups" even when they are in networks.

2. Juan-Antonio Carrasco, Bernie Hogan et moi have piece on in Field 
Methods on 2 different interview based methods of qualitative data 
collection of "close" ties. As I recall, they are correlate highly, at 
about .88

Good question.
  Barry Wellman

   S.D. Clark Professor of Sociology, FRSC               NetLab Director
   Department of Sociology                  725 Spadina Avenue, Room 388
   University of Toronto   Toronto Canada M5S 2J4   twitter:barrywellman             fax:+1-416-978-3963
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