Machismo when the party gets loud
Now this was fascinating: "Subjects who made incorrect decisions under "noisy" conditions tended to have extremely high confidence that their decisions were right. They were far more confident than the subjects dealing with a noncluttered image."
Hmmm...so, the "louder" and more confusing it gets, visually speaking, the more machismo shows up at the party.
The original article, "Visual Clutter Causes High-Magnitude Errors," can be found here.