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Research Problem<br />Social media….<br />Not all relationships (or social roles) are equal in a community<br />Not all CMC formats are equal<br />Questions<br />What are interaction patterns in online health social networking?<br />How varied are patterns across multiple CMC formats?<br />

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Data Set<br />MedHelp.org<br />Alcoholism Community<br />3 CMC formats in Social Media<br />Forums<br />Journals<br />Notes<br />

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Method<br />Positional Analysis (group users based on activity)<br />social position: sets of actors with similar ties to others <br />social role: systems of ties between actors or positions<br />Blockmodeling<br />Structural Equivalence<br />Reciprocity in Light Support & Deep Support (Pfiel & Zaphiris, 2009)<br />doi:10.1016/j.chb.2009.05.001<br />