Nonverbal charisma is basically a myth—we just think speakers are successful because they're good-looking.
SSRN · March 18, 2026 · 6433099
The Takeaway
By comparing computer analysis with thousands of human ratings of TED talks, researchers found that body language and nonverbal cues have zero relationship with a talk's actual influence or reach. The study reveals that humans consistently mislabel 'attractiveness' as 'nonverbal charisma,' whereas computers show that only verbal content actually drives results.
From the abstract
Obtaining valid ratings of verbal and nonverbal behavior to determine if they cause an outcome is difficult unless human coders are blinded. Blinding is achievable for verbal behaviors (e.g., analyzing transcripts). However, for nonverbal behaviors, coders typically observe the target, risking stereotype activation, which may cause bias in ratings and in determining whether it causes performance. In Study 1, we assess the extent of this potential bias by reviewing the predominant coding methods