My anecdotal experience, from regular daily interactions with younger people over the past 10 years, is that they mistake a plethora of social media voices as somehow diversity of information sources. They are rarely able to articulate counter-arguments to their own viewpoints. So, I have no research as such but, my personal experience is that there is much less critical thinking in that age group, although, as a group, they believe they are better critical thinkers. It’s odd. Perhaps a version of the Dunning Kruger effect?