Infants' responses to male and female faces and their preferences for happy versus fearful faces were studied to extend findings indicating that infants at 7 months can generalize discrimination between expressions of happiness and surprise across four different female models' faces. In the first experiment, a paired-comparison procedure was used…

Experiments presented indicate that perseverative error in year-old infants cannot simply be a memory problem. Possible explanations are examined. (Author/ED)

Tests the hypothesis that age-related shifts in infants' visual preferences for stimuli (varying in complexity as defined by number of light-dark intersections) are due to changing attention value both within and between the inversely varying dimensions of size and number. (Author/ED)

Study supported by the Ontario Mental Health Foundation (Grant No. 16) and the Association for the Aid of Crippled Children.

Frequency difference thresholds were determined for fourteen 4- to 9-month-old infants (mean age, 6 months 10 days) using a discrimination learning paradigm, following a one-up, two-down staircase procedure. The subject heard 500 msec tone bursts repeated at a rate of one per sec, with a fixed standard frequency. At various points in this pulse…

This study systematically investigated the influence of direction and frequency of rocking on the activity of two-month-old infants. Of the 84 subjects, 42 were males and 42 females. They were brought to the laboratory at least 2 hours after each feeding and placed supine in a bassinet. Rocking at 60 cycles per minute resulted in a greater…

This study shows that 12-month-old infants direct more distal/affiliative behaviors to their fathers and show no preference between parents in proximal/attachment behaviors. However, with a stranger present, more proximal/attachment behaviors are directed toward the mother with no preference shown in distal/affiliative behaviors. (JMB)

Tested two competing hypotheses explaining infants' failure to search for an object in a new hiding place: (1) that the concept of object is not yet differentiated from the concept of place, and (2) that difficulties in spatial localization are responsible for the search failure. (Author/JMB)

Studied were the responses of infants to new toys presented with either positive, negative, or neutral affective displays by mothers. Responses to stimulus toys were compared with responses to free play toys. Maternal displays influenced responses only to stimulus toys. (PCB)

Examines the relation between aspects of the fundamental frequency (basic pitch) of 16 infant newborn cries and 28 multiparous mothers' perceptions of those cries. Results support the hypothesis that increases in fundamental frequency are related to increases in maternal perceptions of the intensity of the infant's cry. (Author/RWB)

The behavioral dynamics of three different types of early mother-infant interactions were examined. Mothers were instructed to play with, imitate, and hold the attention of their infants. Frequency of vocalization, gaze direction, and smiling by both interactants, tactile play by the mother, and crying by the infant were recorded. (PCB)

Habituation to single female faces and to single geometric patterns was observed separately in two groups of infants who participated in two sessions separated by 10 days. Habituation was found to be distributed into three patterns and showed moderate but significant reliability between assessment sessions. (Author/RH)

Full-term and preterm infants who had participated in studies of cross-modal and intramodal transfer at 12 months of age were seen at older ages to assess the predictive validity of these early measures for later cognition. (Author)

Analysis of computerized linked birth and death record information found that maternal age and education are inversely related to infant mortality, while mother's parity is directly related. Accident mortality rate differentials by educational level were more evident for certain categories of accident (suffocation, death by fire). (Author/GC)