Table 1.

Facial activity characteristics used for picture selection, based on FACS (Ekman et al., 2002).

Expression	Facial activity
Joy	Raised cheek and lip corner pulled up, inner brow raised, nasolabial deepened
	Optionally: jaw dropped, lip corner depressed
Anger	Brow lowered, lid tightened, upper lid raised, lip tightened
	Optionally: Upper lip raised, chin raised, lip pressed
Disgust	Nose wrinkled, upper lips raised
	Optionally: Lip corner depressed, lower lip depressed
Fear	Inner and outer brow raised, brow lowered, upper lid raised, lips parted and stretched, jaw dropped and mouth stretched
Surprise	Inner and outer brow raised, jaw dropped
Sadness	Inner brow raised, brow lowered, lip corner depressed