The excursions will be crucial to the success of the design. Here I shall try to figure out what they comprise.
blink
eyes down
eyes left
eyes right
eyes up: “Oh, lordy!”
sigh
double eyebrow lift
single eyebrow lift
narrowing eyes
elevated jowls, tightened lips
yawn
tilt head, eyes upward
Causation
Next I need to set up the relationships between the moods. This will take the form of a table of probabilities for each excursion as a function of each of the three moods:
probability(excursion, sadness_joy, suspiciousness_trust, fear_anger)