What are the origins of object permanence? Despite widespread interest in this question, methodological barriers have prevented detailed analysis of how experience shapes the development of object permanence in newborn organisms. Here, we introduce an automated controlled-rearing method for studying the emergence of object permanence in strictly…

Packing is a problematic mealtime behavior that is characterized by pocketing or holding solids or liquids in the mouth without swallowing. In the current study, we examined the effects of a chaser, a liquid or solid consistently accepted and swallowed by the child, to decrease packing of solid foods in 3 children with feeding disorders. During…

A total of 23 infants were longitudinally studied to ascertain how kind and amount of prereaching activity changes with age during the first four months of life. Substantial changes were observed in the pattern of prereaching around two months of age. (RH)

Twenty-two infants (6.7 to 12.3 months old) were tested on a visual-cliff apparatus both crawling and in a walker. Results suggest a maturation-based explanation of cliff-avoidance in infants. (CM)

Examined changes in cortisol and behavioral responses in 83 infants. Found that salivary cortisol responses before and after inoculation were high at 2 months, decreased between 2 and 4 months, remained stable, then declined again between 6 and 15 months. Found some evidence that emergence of circadian rhythm in cortisol might be related to early…

Studied the organization of the behaviors involved in the development of prehension by 80 infants of 1-8 months. Four types of behavior patterns that occurred at different periods were found to constitute the development of prehension. (BG)

Evaluated the relation between fetal activity and postnatal behavior and development by measuring the amount of fetal movement occurring in response to stimulation and the number of stimulus applications necessary for habituation. Preliminary evidence suggests that fetal rate of habituation predicts some aspects of infant behavior and development…

Videotape recordings were made of the kick and step movements of six infants seven months of age, while they were in supine and upright positions on a stationary and moving treadmill. When placed on a moving treadmill, infants performed alternating stepping movements with many characteristics of mature walking. Implications are discussed. (RH)

The development of intention to communicate among infants is discussed. In addition, the construct of intention is examined and a model describing the development of intention is proposed. The model is used to describe both the development of intentional behavior and communication as an intentional behavior. (Author/RH)

Results indicated that the more frequently the children studied expressed emotion, the older the age of language achievements; and the more time spent in neutral affect, the younger the age of language achievements. (PCB)

Discusses contributions of Adolph's study to behavioral knowledge; it is an important study of the early development of a universal basic pattern of human behavior, illuminating how humans perceive the possibilities for action and learn to use them when appropriate opportunities are offered. Notes that the study addresses generalization of newly…

Examined how infants acquire adaptive locomotion in the novel task of going up and down slopes. Found that infants' judgments became increasingly accurate and exploration became increasingly efficient, with no transfer over the transition from crawling to walking. Infants learned to gauge their abilities on-line as they encountered each hill at…

Proposes an amended timetable for the origins of joint visual attention and offers theoretical alternatives for the development of point. Includes discussions of the origins of intentionality, the emergence of joint attention, the transition to pointing comprehension, the signal cues of different joint-attention cues, pointing comprehension, the…

Maintains that Muller and Overton (1998) challenge the current Zeitgeist regarding infant cognitive development. Suggests that researchers reconsider infants as developing actors in a meaningful environment, not as born philosophers. Notes the need to explore processes underlying key transitions in infancy and the relation between action and…

Discusses how Adolph's research is relevant to four themes that are foundational to contemporary research on the development of perception and action: (1) reciprocity between perception and action; (2) prospective control of behavior; (3) variation and selection in the development of new behaviors; and (4) contributions of age and experience.…