The other reply has it right, but I wanted to reply to confirm.
“Pronouns” in this context almost always means “preferred pronouns” especially wrt people who have preferred pronouns that differ from those assigned at birth.
It’s a bit hard to believe that someone would be aware of the study you mentioned, but not the common usage of the terms.
medgremlin@midwest.social 4 weeks ago
The comment was referring to preferred pronouns as just “pronouns” because the cultural zeitgeist has conflated the two. There are tons of right wing assholes that say that they “refuse to use pronouns at all” without processing the difference between “preferred pronouns” and the grammatical construct of pronouns as a whole.