Based upon a paper presented at the American Psychological Association, Miami Beach, 1970. (Editor)

In order to study spontaneous imitation, 13 triads of familiar peers ages 2 years to 2.11 years were brought together without adult presence in an experimental setting containing three sets of 10 different categories of objects. Analysis of filmed data focused on occasions when two children simultaneously held matching objects. (Author/RH)

Investigates the predictability of cognitive differences at 12 months from infant and maternal behaviors at 4 months. Overall, the results show that some individual differences in cognition may be predictable across the first year of life. (Author/RH)

Examined relations between reactivity (peak response) and regulation (response dampening) in 6-month-olds' cortisol and behavioral responses to inoculation. Found that reactivity and regulation were unrelated for both cortisol and behavior, suggesting both measures are needed to characterize more accurately infant response to stress. Found…

Reports that, even though young infants can discriminate among different facial expressions, there are individual differences in infants' expressivity and ability to produce and discriminate facial expressions. (PCB)

Studied 112 preterm infants to determine developmental changes and stability of individual differences. Results indicate significant developmental gains with age, and highly significant individual stability of performance across age. (RJC)

In a laboratory procedure, 66 infants of 12 months were given happy, fearful, and conflicting emotional signals by their mothers and fathers with reference to five unusual toy stimuli. There were marked differences among infants in their capacity for and style of coping with conflict. A variety of specific responses to conflict were observed. (RH)

As an important part of the plan to record and systematically deal with all observable behavioral events that constitute an infant's waking life, all social encounters between the baby and other persons that occurred during weekly observations of two infants in their everyday milieu were recorded. (Author/CB)

Studies the effects of mothers' presence and absence on two infants from birth to two years. (AJ)

Individual differences in pattern of habituation in fixation time and cardiac change to visual and auditory stimuli are described. Subjects were 94 5- and 10-month-old infants. (Author/MP)

Reports a study of 110 newborn infants' responses to the heelstick procedure to draw blood samples, and of the responses of 40 of those infants to their first inoculations at two months of age. Discusses measures of distress; stability of reactivity across time; and individual differences and health of the infant as factors in reactivity. (NH)

The purpose of this paper is to outline some application of the Markov Process to the study of state and state changes. The essence of this mathematical concept consists of the analysis of sequences of infant responses in interaction with its environment. Categories can be defined which reflect the joint occurrence of an infant's behavior (or…

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Data indicate that the interventions provided differed in their effectiveness in calming newborns to a highly significant degree. (Authors)

Forty crying and 24 sleeping 2- to 3-day-old healthy, full-term newborns were given six interventions whichentailed contact and/or vestibular stimulation. Scores obtained on a six-point scale assessing levels of alertness imply that the vestibular stimulation which attends maternal caretaking activities is crucial, at least during the neonatal…