"[...] sharing discernment (the difference in sharing intentions for true versus false headlines) was 2.0 times larger in the treatment relative to the control group in study 3, and 2.4 times larger in study 4. Furthermore, there was no evidence of a backfire effect, as the treatment effect was actually significantly larger for politically concordant headlines than for politically discordant headlines"
In other words, people who were primed to pay attention to accuracy were significantly less likely to share misinformation. Seems to me like an example of it working quite well.
Yes, I don't take the studies seriously because I've worked on Mechanical Turk. The people primed to pay attention are maximizing their workflow, because taskmasters set unreasonable time limits, incomprehensible instructions, and every action is necessarily out of context. Attention there is totally divorced from anyone browsing a news feed.
From section "Priming accuracy improves sharing":
"[...] sharing discernment (the difference in sharing intentions for true versus false headlines) was 2.0 times larger in the treatment relative to the control group in study 3, and 2.4 times larger in study 4. Furthermore, there was no evidence of a backfire effect, as the treatment effect was actually significantly larger for politically concordant headlines than for politically discordant headlines"
In other words, people who were primed to pay attention to accuracy were significantly less likely to share misinformation. Seems to me like an example of it working quite well.