  While much attention has been devoted to the causes of opinion change, little
is known about its consequences. Our study sheds a light on the relationship
between one user's opinion change episode and subsequent behavioral change on
an online social media, Reddit. In particular, we look at r/ChangeMyView, an
online community dedicated to debating one's own opinions. Interestingly, this
forum adopts a well-codified schema for explicitly self-reporting opinion
change. Starting from this ground truth, we analyze changes in future online
information consumption behavior that arise after a self-reported opinion
change on sociopolitical topics; and in particular, operationalized in this
work as the participation to sociopolitical subreddits. Such participation
profile is important as it represents one's information diet, and is a reliable
proxy for, e.g., political affiliation or health choices.
  We find that people who report an opinion change are significantly more
likely to change their future participation in a specific subset of online
communities. We characterize which communities are more likely to be abandoned
after opinion change, and find a significant association (r=0.46) between
propaganda-like language used in a community and the increase in chances of
leaving it. We find comparable results (r=0.39) for the opposite direction,
i.e., joining a community. This finding suggests how propagandistic communities
act as a first gateway to internalize a shift in one's sociopolitical opinion.
Finally, we show that the textual content of the discussion associated with
opinion change is indicative of which communities are going to be subject to a
participation change. In fact, a predictive model based only on the opinion
change post is able to pinpoint these communities with an AP@5 of 0.20, similar
to what can be reached by using all the past history of participation in
communities.
