Investigated the responses of 57 infants to breast and axillary odors produced by lactating females. Two-week-old bottle-fed girls responded preferentially to the breast odor of a nursing woman when it was paired with the woman's axillary odors or odors from a nonparturient female. (RJC)

A series of investigations were conducted to determine whether reflexive crying occurs in newborns and to define the parameters that control his behavior. (NH)

Examines the relationship between an infant's sex and its capacity to maintain eye contact. Subjects were 15 male and 15 female newborn infants. (MP)

Preference for novelty, as measured with an exploratory behavior paradigm, was compared in 8-month-old full-term and preterm infants of matched conceptional age. Subjects were 64 infants, 32 full term and 32 preterm, with 16 males and 16 females in each group. (Author/JH)

This study investigated the hypotheses that 1) infants delivered from a left occiput anterior or transverse position (LOA/LOT) would exhibit a right supine head orientation in the neonatal examination and a right hand preference at 19 weeks of age; and 2) infants delivered from a right occiput anterior or transverse position (ROA/ROT) would…

Experiment demonstrates that the reinforcing efficacy of visual feedback is related to its degree of redundancy. (WY)

Examined the relationship between observed sex differences in infants' play, parental responses to these play patterns, and parents' ratings of sample child behaviors as typically masculine, feminine, or neither. (JMB)

The fundamental frequencies (Fo) of infant cries were analyzed to determine if mean cry Fo differed as a function of the infant's sex or due to the stimulus evoking the cry. Results indicate no significant differences in either; however, males exhibited a tendency to have higher mean Fo. (Author/KM)

Male infants habituated their fixation time over trials and differentiated between the novel and familiar stimuli when the posthabituation interval was 15 seconds, but neither male nor female infants did so when the interval was 5 minutes. This paper is based upon a thesis submitted by the first author in partial fulfillment of the requirements…

Examined the sex differences in physiological and behavioral stress reactivity among 36 healthy, full-term neonates after a mildly stressful behavioral assessment procedure. Salivary cortisol, heart rate change, Neonatal Behavior Assessment Scale (NBAS) cluster scores, and behavioral states after the NBAS provided 100% discrimination between male…