How Emotional Support and Informational Support Relate to Linguistic Alignment

Linguistic alignment in text-based communication means that people tend to adjust their language use to one another both in terms of word choice and sentence structure. Previous studies about linguistic alignment suggested that these two forms of adaptation are correlated with each other, and that they build up to alignment at a higher representational level, such as pragmatic alignment for support functions. Two types of social support have been identified as important for online health communities (OHCs): emotional and informational support between support seekers and support providers. Do the two lower-level alignment measures (lexical and syntactic) relate to these two types of social support in the same way or, are they di↵erent? Our hypothesis was that they are similar, due to their correlation relationship. However, we found that, based on an analysis of a 10-year online forum for cancer survivors, the lower-level alignment measures have distinct relationships to the two higher-level support functions. In this paper, we describe this finding and its implications regarding potential refinement of the Interactive Alignment Model.