Concept acquisition in the human infant.
The ability of 18-, 24-, and 30-week-old infants to learn conceptual categories regarding adult female faces was examined using a habituation paradigm. Little evidence for conceptual categorization occurred at 18 or 24 weeks, but at 30 weeks infants learned to respond to "a specific female face regardless of orientation" and to "female faces in general."
D003210:Concept Formation; D004193:Discrimination Learning; D005260:Female; D005793:Generalization, Psychological; D006185:Habituation, Psychophysiologic; D006801:Humans; D007223:Infant; D008297:Male; D010364:Pattern Recognition, Visual