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A psychology research paper focusing on the impact of sharing articles on people's knowledge
Regardless of whether a person read an article they shared, their subjective knowledge increased - and higher than their objective knowledge actually increases. The takeaway from this study is that sharing of articles increases a person's self assessment of their own knowledge, but it does not actually increase their knowledge.
A study that got Reddit users to install an extension that tracked their voting patterns, and their interactions with the content they voted on.
The bottom bar plot shows that almost one-third (31%) of all participants that voted only rarely (i.e., < 20% of the time) viewed a post’s content and/or comments before voting and thus make their decision based on the headline alone. Conversely, about 17% of all participants regularly (i.e., ≥ 80% of the time) viewed a post’s content or comments before voting. The remaining users are spread relatively equally between the two extremes of rarely and regularly browsing before voting.