The current study distinguishes between attributions of goal-directed perception (i.e. attention) and non-goal-directed perception to examine 9-month-olds' interpretation of others' head and eye turns. In a looking time task, 9-month-olds encoded the relationship between an actor's head and eye turns and a target object if the head and eye turns…

In 3 experiments, the author investigated 16- to 20-month-old infants' attention to dynamic and static parts in learning about self-propelled objects. In Experiment 1, infants were habituated to simple noncausal events in which a geometric figure with a single moving part started to move without physical contact from an identical geometric figure…

Paying attention to development and the earliest possible detection of relevant development disturbances during the first year are among the essential responsibilities of the paediatrician. We present a questionnaire for the documentation of the developmental progress of babies, having been compiled in the Loczy Institute in Budapest, according to…

Two-month-old infants (N = 29) participated in face-to-face interactions with their mothers and with strangers. The contingent responsiveness for smiles and vocalizations, while attending to the partner, was assessed for each partner in both interactions. For smiles and for vocalizations, infants were less responsive to the stranger relative to…

Although previous research with adult humans and nonhumans has suggested a relationship between sleep behavior and brain serotonin levels, no studies have been made of the relationship of normal children's or infants' sleep patterns to serotonin levels, tryptophan metabolism, or diet. This study investigates the relationship between dietary…

Research supported largely by grant HD-02296 from the National Institutes of Health, U.S. Public Health Service.

Results show that at eight months of age ability to identify the site of an event after reorientation is based on the spatial relationship between the event and environmental features. The latter include features associated with room shape as well as a landmark at the site of the event. (Author/RH)

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)

Two experiments were conducted to test effects of infants' ability to locomote on their social and exploratory behaviors. Results indicated that walker-assisted or independent locomotion afforded similar experiences within a standard environment but experiences quite different from those of the nonlocomoting infant. (Author/RH)

Investigates the effect of target size and presence, intensity, and location of sound on the visual following of infants one and two months of age. (Author/RH)

Ten-month-old infants in an unfamiliar environment with their mothers were left free to approach and touch a distant, unfamiliar object-a person or a toy. Results suggest that looking at persons constitutes exploratory behavior whereas touching and manipulating served this function with inanimate objects. (CS)

This is a report of the initial phase of a project to identify developmental profiles of high-risk, low birthweight infants. (Authors/JA)

Evidence indicates that the newborn infant must first develop cognitive systems, through his experience with various stimuli, to differentiate each modality separately before he can integrate any two modalities in classical conditioning. (Author/NH)

Subjects were six normal infants whose kicks were or were not reinforced. Examines how the temporal structure of kicking changed when infants learned a mobile task. Quantifies amplitude changes in spontaneous kicks versus those used operantly, and investigates whether reinforcement makes kicking more "efficient" through reducing…

Three experiments tested whether 12- to 24-month-old children showed systematic search, persistence, and/or end-screen search in the invisible-displacement task. A fourth study tested whether end-screen search resulted from seeing the experimenter move his hand through the series of screens. (RH)