I somehow doubt Sarge knew he was testing to see who in the class was liberal:
In a new study, UNL researchers measured both liberals' and conservatives' reaction to "gaze cues" -- a person's tendency to shift attention in a direction consistent with another person's eye movements, even if it's irrelevant to their current task -- and found big differences between the two groups.
Liberals responded strongly to the prompts, consistently moving their attention in the direction suggested to them by a face on a computer screen. Conservatives, on the other hand, did not.
Why? Researchers suggested that conservatives' value on personal autonomy might make them less likely to be influenced by others, and therefore less responsive to the visual prompts.
Dodd said the participants were told that the gaze cues in the study did not predict where the target would appear, so there was no reason for participants to attend to them. "But the nature of social interaction tends to make it very difficult to ignore the cues, even when they're meaningless," he said.
We're really good at ignoring irrelevancies.