https://www.sciencedaily.com/releases/2018/10/181011173106.htm

In an online experiment with 3,476 people ranging from 20 to 87 years in age, researchers found that most people were able to correctly identify fake images, rating image credibility fairly low on a 7-point scale (1 being not credible at all, 7 being extremely credible). This was true even when they were told they came from The New York Times or NPR, or other known news organizations.

"We found that participants' internet skills, photo-editing experience, and social media use were significant predictors of image credibility evaluation," said the study's lead author, Cuihua (Cindy) Shen, professor of communication at UC Davis. "The results show that participants, no matter how careless or distracted they may be, can still be discerning consumers of digital images."