Observations in an infant day care program in which mothers take part indicated "jealousy" in infants as young as 5 months when they saw their mother or even the assigned caregiver paying attention to another infant. A total of 18 first-born females between 11 and 13 months of age were the subjects in a systematic study of this…

The booklet provides background information on the diagnosis and characteristics of autism. A chart portrays the signs and symptoms, followed by the definition of the syndrome by the National Society For Children and Adults with Autism. Associated features are noted along with information on age of onset, etiology, incidence and sex ratio,…

An investigation of Piaget's theory of object concept development through a series of six tasks administered in a combined longitudinal/cross-sectional design (which incorporated a number of methodological controls). Subjects were 36 infants who received the six tasks during each of three testing sessions over a 6-month period. (Author/ED)

Clarifies issues involved in use of heart rate as index of newborn attentional responsivity by reviewing related studies and concluding that heart rate variability can be used in studying attentional responsivity state, and intra-individual and individual variables. (ED)

Sex differences in the behavior of infants may have the potential for eliciting differential treatment from adults, regardless of whether or not adults consciously intend to encourage sex-differentiated behavior. The role of biologically-based sex differences in partially determining cognitive development is discussed. Availability information is…

Attempts to integrate the ethological interpretation of the Bell and Ainsworth findings on the promptness of mother reaction to infant crying, with operant laboratory infant research. Suggests an alternative operant interpretation based on the concept of counter conditioning. (Author/ED)

Study supported in part by Grant MH-10993 from the National Institute of Mental Health, U.S. Public Health Service.

To investigate the relationship of differences in 2-year-old children's reactions to strangers to differences in their temperaments and their security of attachment with their mothers, a correlational study was conducted with 47 infants and their parents. In the first component of the study, both parents completed a child temperament rating…

The results obtained by researchers interested in the speech-time relationship indicate that the sequential organization through time of speech sounds necessary for communication requires a universal "grammar" consisting of vowel and consonant sequences and an awareness of the duration experienced in that process, as well as the memory…

One pathway through which second order effects proceed is "social referencing," a process in which the individual utilizes another's interpretation when appraising a situation. This phenomenon is well identified in adults and older children. While it had not been studied in infancy, there are good indications that the necessary cognitive…

The preference of the infant for mother versus father as an attachment figure and as a secure base for exploration is examined in this study. Subjects were fifteen 15-month-old infants whose mothers were their primary caregiver. The Ainsworth Strange Situation procedure was modified to permit both parents' simultaneous presence during separation…

The influence of age, sex, representational detail of objects (prototypicality) and adult play suggestions on children's progression of pretend behaviors was studied. A checklist was developed and utilized for coding the responses of 20 children (10 males, 10 females), to objects judged to be high and low prototypical by 12 adults. Children ranged…

FINDINGS WERE REPORTED ON THE ROLE OF EXPERIENCE IN THE DEVELOPMENT OF THOSE SKILLS NECESSARY FOR VISUALLY DIRECTED REACHING. THE SKILLS INVOLVED WERE THE ORIENTING, ACCOMMODATING, AND PURSUIT RESPONSES OF THE EYES, ALL OF WHICH ARE ACHIEVED DURING THE FIRST HALF-YEAR OF LIFE. SEVERAL EXPERIMENTAL CHANGES WERE MADE TO THE ENVIRONMENT OF A GROUP OF…

This study describes the natural activities, behaviors and social interactions of 32 infants in their own homes. Participating families were from Oklahoma City, Oklahoma and Salem, Oregon; were involved in the Child and Family Resource Program (CFRP); and had a child between the ages of 11 to 14 months when the study was conducted. The families…

This paper presents research findings on differences in the social and cognitive behavior of first born and only children at 3, 12, and 24 months of age as observed at home and in a free play laboratory setting. The sample consisted of 21 only children (children who did not acquire a sibling for at least the first 48 months of life) and 35 first…