People Often Think An Opinion Heard Repeatedly From The Same Person Is Actually A Popular Opinion

Another finding that seems to cohere with intuitions.

"This finding shows that hearing an opinion multiple times increases the recipient's sense of familiarity and in some cases gives a listener a false sense that an opinion is more widespread then it actually is."

Presumably this is reflecting a mechanism that produces plausibility structures and, I suspect, is strongly related to mimesis and the action of mirror neurons. That's my working hypothesis.
ScienceDaily: People Often Think An Opinion Heard Repeatedly From The Same Person Is Actually A Popular Opinion: