Assessed behavioral and physiological differences between 61 breast-fed and 39 bottle-fed neonates. Mean postpartum assessment occurred at 37 hours. Results suggest that breast-fed infants had significantly longer heart periods, elevated heart period variability, and higher vagal tone than bottle-fed infants. (Author/RWB)

Investigated infants' reactions to the face-to-face/still-face paradigm. Infants reacted to the still-face with negative affect, a drop in vagal tone, and an increase in heart rate. By contrast, they reacted to the reunion episode with a mixed pattern of positive and negative affect. (HTH)

Evaluated the effect of pacifiers and sucrose stimulation on the heart rate, coordination, and behaviors of normal infants and infants born to methadone-maintained mothers. Found that pacifiers stimulated immediate changes in all behaviors, which returned to baseline levels when pacifiers were removed. Sucrose stimulation precipitated gradual…

Compared infants who had evidenced similar levels of crying as neonates but differed at five months of age. For initially high-crying infants, mothers' personality and marital quality, and infant variables discriminated stable from changing infants. Mother sensitivity and infant responsiveness at five months were related to continuity of infants'…

Examined cardiac response and ratings of subjective aversiveness to recordings of unfamiliar infant cries in 60 primiparous women at 32 weeks' gestation. Mothers who prenatally rated the crying recordings as more aversive postnatally described their infants as more fussy and unpredictable. Women who showed greater cardiac acceleration to the cries…

Twenty male and 29 female active-duty Air Force personnel viewed and listened to videotapes of a crying infant and a smiling infant while heart rate, skin resistance, and respiration rate were monitored. Males showed a larger increase in skin conductance and heart rate than females during the crying infant stimulus. (Author/CR)

Examined cardiac activity during the first 13 months of life. Indexes of cardiac activity changed in an orderly way with development. There were intercorrelations among the cardiac measures. Analyses indicated that measures of heart-rate variability were significantly higher in insecure children than in secure children. (BC)

This paper presents a study of the looking and looking away or gaze alternation behavior of both full term and preterm infants in the presence of varying degrees of facial animation. The faces used in the study included, in increasing order of animation, a Raggedy Ann doll's face, a moving and talking doll's face, a mother's less animated face…

The purpose of this study was to investigate class differences in the responses of infants to tape recordings of mothers' and strangers' voices. Subjects were 10-month-old first-born Caucasian girls, 30 from middle class families and 30 from working class families. Stimuli presented through a speaker placed in front of the infant consisted of…