First and fifth graders estimated all interlocation distances among six objects in one of two environments: a familiar library or a novel arrangement of objects in a room. Findings suggest (1) an increase in the ability to shift among spatial frames of reference with development and (2) a sequence of mastery of spatial knowledge. (RH)

Examined the ability of 1-year olds to remember the location of nonvisible targets. Found that infants were able to associate a nonvisible target with a direct landmark and to code its distance and direction with respect to themselves or the larger framework. Difficulty of coding with indirect landmarks was associated with cognitive complexity and…

Two experiments examined development of economic understanding among 5-, 7- and 9-year-olds. Found that most 5-year-olds understood the goal of acquiring desired goods, and most 7- and 9-year-olds also understood the goals of seeking profits, acquiring goods inexpensively, and competing successfully with other sellers. Results suggest that older…

Investigated the relation between 7- and 8-year-olds' interpretations of human behavior and children's beliefs about the stability of human traits. Found that the belief that traits are stable predicted a greater tendency to make trait judgments in the academic and sociomoral domains, and an increased focus on outcomes such as performance and…

Investigated in preschoolers whether the bilingual advantage in cognitive control or selective attention could be found in a nonverbal task, the dimensional change card sort, requiring minimal demands for analysis or representation. Found that bilingual children were more advanced than monolinguals in solving problems requiring high levels of…

Studied in three experiments the distribution and malleability of visual attention in 5-month-olds while they inspected large geometric designs. Established that infants who were short-lookers had novelty scores above chance, whereas long-lookers demonstrated chance responding. Illuminating different parts of visual display induced long-lookers to…

To characterize cognitive maturation through adolescence, processing speed, voluntary response suppression, and spatial working memory were measured in 8- to 30-year-old (N=245) healthy participants using oculomotor tasks. Development progressed with a steep initial improvement in performance followed by stabilization in adolescence. Adult-level…

When an object moves behind an occluder and re-emerges, 4-month-old infants perceive trajectory continuity only when the occluder is narrow, raising the question of whether time or distance out of sight is the important constraining variable. One hundred and forty 4-month-olds were tested in five experiments aimed to disambiguate time and distance…

This study examined whether 16-month-old walking infants take the material composition of a handrail into account when assessing its effectiveness as a tool to augment balance. Infants were encouraged to cross from one platform to another via bridges of various widths (10, 20, 40cm) with either a wobbly (foam or latex) or a wooden handrail…

Piaget's concept of "internalization" is analyzed and related to Bruner's representational theories of cognitive development. Cognitive structures are shown to be real exclusively in an actual representation. (Author/SDH)

The development of moral judgment in 11-year-old girls is discussed in terms of the evaluation of role taking ability. (ST)

Investigated whether there exists a stage of development at which "imagery-inducing motor activity" ceases to be facilitative relative to the effectiveness of alternative kinds of associative-learning strategies. (Author/SDH)

Reports two experiments which examine how cognitive style interacts with performance on tasks measuring formal thought. (Author/JMB)

Matched groups of normal and retarded readers were required to perform same/difference judgments in which the interval between standard and comparison stimuli was either 0, 1, or 6 seconds. (BRT)

Reports the results of one study in which parents taught their two- to four-year-olds basic and superordinate concepts, and another, in which they taught them subordinate concepts. Parents' teaching styles were analyzed in terms of their usefulness for children who are attempting to learn about principles of hierarchical classification. (AS)