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This dissertation focused on how the affiliation and engagement practices that contribute to social cohesiveness result in changes to conversation for three individuals with aphasia that were part of group therapy that targeted improved communication through conversation. It revealed how those changes were made manifest by employing a qualitative research design which allowed the researcher to discover how social cohesiveness is demonstrated in conversation. This design included the administration of aphasia batteries that are widely used in the area of aphasiology and were administered prior to and subsequent to the period of conversation treatment. The design further included medical and clinic records that informed the researcher of the participant's physical and communicative abilities. The primary research tool was Conversation Analysis which by virtue of its dual characteristics of being context …