emotion

You think your nerves are obvious to everyone around.

Research shows people overestimate how effectively others read their internal states, a phenomenon known as the illusion of transparency.

The deception-based experiment described was conducted in 1998 by Gilovich, Savitsky, and Medvec, not the 2003 paper by Savitsky & Gilovich.

You are far better at masking your feelings than you think.

Where this comes from

Study: Savitsky & Gilovich, 2003
What the check found: The core psychological phenomenon (the illusion of transparency) is well-documented, but the claim incorrectly attributes the 1998 'deception' study to the 2003 paper.
Confidence: Solid, with limits

One of these every day, and every one names the study it came from. When a finding is contested, it says so.