1. Early mother-infant reciprocity;Brazelton,1975
2. Differential visual behavior to human and humanoid faces in early infancy;Carpenter;Merrill-Palmer Quarterly,1970
3. Sex differences: A study of the eye of the beholder;Condry,1976
4. Signal detection theory and psychophysics;Green,1966
5. Sex-related pragmatics in infants' nonverbal communication;Haviland,1977