John Heritage (born July 10, 1946) is Professor Emeritus of Sociology at University of California at Los Angeles.
[1] This book overviewed, integrated and introduced the highly technical field of ethnomethodology to a broader audience.
At UCLA he joined Emanuel Schegloff, one of the founders of conversation analysis (alongside Harvey Sacks and Gail Jefferson).
This had a number of strands, looking at the patterning of primary care visits, the way drugs such as antibiotics are prescribed, the way patients present their problems and how physicians deliver 'on-line' commentary on what they are doing.
More recent work has focused on the way epistemic issues—issues that relate to what speakers know and don't know—are managed in conversation.