movement, and participants’ faces were closely observed via video monitor to ensure that each facial movement was performed correctly. Participants had no visual feedback, and auditory feedback consisted of describing the intended facial movement again (e.g., “raise your upper eyelid”). Two FACS-trained (but not FACS-certified) observers rated each participants’ facial expression performance on a 7-point scale (1 = no target facial movements achieved; 7 = target facial movements prototypic).2 Mean levels of task quality across raters and days were: anger M =3.9, SE = .03; fear M = 4.5, SE = .04; happiness M = 4.3, SE = .03; sadness M = 3.8, SE = .03. Intraclass correlation coefficients (ICCs) between the two independent raters across participants and days ranged from .71 to .78. Experimenters did not interrupt recording for each face but instead ensured that the subject had the facial muscles in place before starting EEG recording. Immediately following each 1-minute facial expression sequence, participants were asked while making that particular face, how angry, afraid, happy, or sad they felt on a scale of 1 to 7 (1 = no experience at all; 7 = intense experience).
