From my understanding, people on the autism spectrum have difficulty reading people's emotions and general social cues. I'm curious how these people develop these skills and what one can do to improve them. I ask this as a matter of personal interest; while I am somewhat neurotypical, I feel this is an area where I am very lacking.
(Sidenote: would this be considered an appropriate used of the discussion section?)
Well for those two, I think there are two possible differences. Guilty people are going to be looking down more and possibly have there eyes closed a bit more.
Possible attributes off the top of my head:
eye contact
general eye direction
direction of the face
open/closed
eyebrows
head tilt (look at number 21for a great example)
wrinkled/furrowed face
Are there any more? That's definitely enough to categorize most emotions.
A few important ones
When you think about it, it's quite telling about just how expressive our eyes are when this test expects people coming out substantially below average to still pick correctly twice as frequently as if they were just guessing.