Observed the reactions of 3.5-month-old infants looking at a carrot that should have but did not appear in a window after passing behind a screen. The results of this and several similar experiments indicated that 3.5-month-old infants are able to represent and reason about hidden objects. (BC)

The ability of 10 9-month-old infants with Down's syndrome to acquire a simple contingency was assessed. Unlike a group of nondisabled infants, the Down's syndrome infants did not, in general, learn the contingency. Results are related to the possibility of a decline in conditionability with age and a relationship between conditionability and…

Infants were exposed to symbolic gestures from their parents beginning at 11 months of age. In bimonthly interviews, mothers reported their infants' use of gestures and words. Results indicated a smaller but reliable difference between the onset of infants' use of symbolic gesture and the onset of their use of words than earlier research…

Infants' visual fixations were monitored while they viewed predictable and unpredictable sequences of stimuli. Analyses of anticipatory fixations indicated that by two months of age, infants form expectations for the reappearance of visual stimuli positioned opposite to each other. By three months, infants rapidly form expectations for asymmetric…

Examines current research on brain development, focusing on infants' ability to understand basic numerical concepts and arithmetic operations. Asserts that as the brain undergoes dramatic transformations, it already has a built-in capacity to understand basic numerical concepts. Recommends that parents and professionals engage in activities…

This study compared the linguistic, cognitive, and behavioral performance at 6-8 years of age of eight children born preterm and low birth weight (3-5 pounds) with that of 12 full-term peers. Quantitative analyses of performance profiles for all the children are provided. Findings found no significant differences between groups in linguistic,…

This study, with 180 deaf or hard of hearing infants and toddlers grouped into four age ranges, found highly significant interrelationships among the four categories of play and the four aspects of communicative development studied. The development of autosymbolic play, age of hearing loss identification, and symbolic object distribution accounted…

When a behavior disappears and then resurfaces, developmental psychologists typically look more closely at the behavior to figure out what is different before and after--that is, they increase the grain with an eye toward discovering how the system that generates that behavior has changed. But what ought to count as a U-shaped phenomenon? How…

The use of assisted reproductive technology is increasing rapidly. Research, although sparse, has resulted in inconsistent findings as to the developmental prognosis for infants conceived by assisted reproductive techniques such as in vitro fertilization and the use of fertility drugs. In the present study, the authors compared twins who were…

We introduce the thematic collection by noting some striking similarities in the cognitive abilities of human infants and nonhuman primates. What are the implications of these similarities for our comprehension of human infant cognition? After providing a brief historical and conceptual background on comparative behavioral research, we discuss how…

We investigated the developmental trajectory of nonadjacent dependency learning in an artificial language. Infants were exposed to 1 of 2 artificial languages with utterances of the form [aXc or bXd] (Grammar 1) or [aXd or bXc] (Grammar 2). In both languages, the grammaticality of an utterance depended on the relation between the 1st and 3rd…

In child-centered education programs, children construct their own knowledge from their experiences and interactions with the world around them, and caregivers foster children's growth and development by building on children's interests, needs, and strengths within a safe and caring environment. The Step by Step educational program developed a…

The present study attempts to move beyond the social address research design to investigate the process by which socioeconomic status (SES) exerts its influence on parenting practices. Of particular interest were maternal practices related to cognitive outcomes in children. The conceptual model of the study was based on the reliable finding that…

This handbook provides a collection of stimulation activities that encourage a child's physical and mental growth from birth to five years of age. Emphasis is placed on making stimulation aids that are inexpensive or can be made from scrap materials. Advice is given about ways to carry out designated activities. All activities have been tried and…

A longitudinal study, intended to produce a profile of the relationship between cognitive, social, and linguistic development in Danish children, had as subjects a boy and a girl aged 11 and 8 months, who were observed until they reached age 3. Naturalistic language used by the children and their parents, videotaped during regular visits, was…