Over the last 2 centuries there has been a rapid increase in the proportion of children who grow up in cities. However, relatively little work has explored in detail the physiological and cognitive pathways through which city life may affect early development. To assess this, we observed a cohort of infants growing up in diverse settings across…

Across languages and event types (i.e., agentive and nonagentive motion, transfer, change of state, attach/detach), goal paths are privileged over source paths in the linguistic encoding of events. Furthermore, some linguistic analyses suggest that goal paths are more central than source paths in the semantic and syntactic structure of motion…

In the present study, we investigated whether infants' own visual experiences affected their perception of the visual status of others engaging in goal-directed actions. In Experiment 1, infants viewed video clips of successful and failed goal-directed actions performed by a blindfolded adult, with half the infants having previously experienced…

Two studies with 9-, 11- and 13-month-old infants were conducted to investigate infants' ability to use an object's material properties to guide their object-directed actions. In study 1, 9- and 11-month-old infants played in an exploration phase with two objects made of different materials, one very heavy and the other one light and playable.…

Over the first years of life, infants gradually develop the ability to retrieve their memories across cue and contextual changes. Whereas maturational factors drive some of these developments in memory ability, experiences occurring within the learning event may also impact infants' ability to retrieve memories in new situations. In 2 experiments…

Two experiments investigated the ability of 3-month-olds to acquire generalized expectancies of reward and the role of these expectancies in memory retrieval. In both experiments, infants exhibited positive transfer over invariant and variable stimulus series; however, in the second experiment, violations of either expected order produced a…

This study examined two alternative interpretations of violation-of-expectation findings that young infants can represent hidden objects. Findings indicated that 5-month-olds succeeded in reasoning about the interaction of a visible and a hidden object even though the 2 objects were never simultaneously visible and a 3- or 4-minute delay preceded…

Infants 9 to 10 months of age were presented with a series of visible displacement hiding trials at two locations. Infants had to choose among three, five, or six alternative locations on each trial. Search attempts tended to cluster around the currently correct location during both trials on all apparati, providing evidence for a memory…

Tested 4-month-olds' memory for surface feature and location information following brief occlusions. Found that when target objects were images of female faces or monochromatic asterisks, infants increased looking times following changes in identity or color but not changes in location or combinations of feature and location. When objects were…

Two experiments studied infants' use of remembered knowledge of auditory-visual events to guide reaching and grasping. Results indicated that reaching was initiated and completed after sound cues ceased. Accurate searching depended on subjects' experience in light presentation. Results suggest that 6 1/2-month-olds can represent unseen objects and…

Investigates the effect of the relationship between conditions at encoding (familiarization) and retrieval (test) with regard to infants' performance on a paired-comparison recognition test. Subjects were 32 male and 32 female infants between 8.7 and 10.3 months of age. (MP)

Two experiments involving two sets of actions using two stimuli sets examined deferred imitation to trace changes in memory retrieval by 18- to 30-month-olds. Results indicated that target action recall with different stimuli increased as a function of age, particularly after a delay. A unique verbal label facilitated 24-month-olds' performance…

Differences in response of four- to seven-month-old infants to tachistoscopically presented photographs of two human faces suggest infants were able to remember a frequently presented face from trial to trial and discriminate it from a discrepant, infrequently presented face. Findings suggest event-related brain potential (ERP) responses could…

This study investigated two-month-old infants' memory for phonetic information using the high-amplitude-sucking procedure (HAS). Specifically, the study explored whether the availability of prosodic organization enhances infants' memory for the phonetic information they hear. After a baseline measure was obtained, infant sucking resulted in a…

Twenty-five one-year-olds were administered two tasks (each of which consisted of a familiarization stage followed by a recognition stage) in order to determine whether infants can recognize the shapes of objects by touch alone. (CM)