Table 2.

Experimental Parameters in Face Emotion Processing

Parameter	Values
Face stimuli
Expressions	Basic: fear, anger, happy, sad, disgust, surprise, neutral; complex/ambiguous
Intensity	Fixed, variable (morphed from neutral, eg, 50%–150% sad)
Stimulus set	Validated, generated de novo
Emotion evocation	Posed, naturally evoked
Face details	Cropped, with hair, schematic
Dynamics	Static expressions, dynamic expressions
Face orientation	Full face, looking away
Gaze	Forward, deviated
Presentation
Duration	Supraliminal, subliminal (with mask)
Configuration	Single face, triplets (for matching/labeling)
Trial grouping	Blocked, event-related, hybrid
Response	During face stimuli, after stimuli
Task
Instruction set	No task (passive);Implicit (attention not directed at face emotion): judge gender, judge face attribute (eg, nose width), judge nonemotional personal characteristic (eg, age range);Explicit (attention directed to face emotion): identify basic emotion, judge character (eg, trustworthiness, likability)
Response set	Fixed forced choice (binary vs multiple), match to exemplar