title: Mirror self-image reactions before age two.
mesh_terms: D000367:Age Factors; D002657:Child Development; D002675:Child, Preschool; D004192:Discrimination, Psychological; D005145:Face; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012649:Self Concept; D014796:Visual Perception