title: Orientation discrimination in infants: a comparison of visual fixation and operant training methods.
mesh_terms: D000367:Age Factors; D003216:Conditioning, Operant; D004192:Discrimination, Psychological; D005403:Fixation, Ocular; D005556:Form Perception; D005793:Generalization, Psychological; D006801:Humans; D007223:Infant; D009949:Orientation; D010507:Periodicity; D012056:Reinforcement, Social; D013997:Time Factors