Features that people rely on when trying to determine the emotional state of the person in the video

Movement
	head movements
	rhythm of head movement
	movement of hand holding the utensil
	sudden body movements
	chest movement (indicator of how fast the person was breathing)
	movement of shoulders
	vertical movement of head while chewing. (Indicator of how forcefully the person is chewing her food)
	jaw movement
	movement of fingers

Posture/position
	particular torso, neck, head
	position of elbows on the table
	how far apart were the actors from the table
	way in which actors where seated

Time
	time between bites
	time spent picking up the food
	time actor put down the utensil (fork)
	time of people holding the utensil with food (people staring at the food)

Force
	Sensation of Force applied through hand motion to the fork when picking the food

Coordination
	hand-head coordination

Others
	They would guess better if the actors were people they know well.
	Color of the shirt the individual was wearing
	Amount of food picked by the fork
	surrounding environment (actor in office more likely to be stressed)