Discusses Lawrence A. Hirschfeld's (1995) experiments, which Hirschfeld claims demonstrate that preschoolers use a biologically grounded theory in reasoning about race. Argues that the methods used cannot address the issue and therefore, the results do not support Hirschfeld's claims. Maintains that the experiments fail to demonstrate that 4- and…

Responds to John J. Kim's critique of his studies of preschoolers' understanding of race. Maintains that his and others' investigations demonstrate that preschoolers differentiate the pattern of causal reasoning governing transmission and maintenance of racial characteristics from that governing transmission and maintenance of perceptually similar…

Reviews selected pioneering findings in the child-developmental and adulthood-aging literature and evaluates them within the framework of Nelson (Thomas O.) and Narens' (Louis) (1990) theory of metamemory. Makes suggestions for conceptually-based analytical research to help specify the mechanisms that underlie developmental differences in…

Three experiments used a visual fixation technique to examine whether toddlers interpret speech continuously. Found that 24-month-olds had delayed responses when a competing distractor picture's label overlapped phonetically with the target at onset, but not when the pictures' labels rhymed, showing that children monitored speech stream…

Traced developmental changes in automatic and intentional processing of Arabic numerals using numerical-Stroop paradigm in two studies. In numerical comparison task, found that congruent physical sizes facilitated and incongruent sizes interfered with numerical comparison at all ages relative to neutral control. In physical comparison task, found…

Examines the advantages and disadvantages of books on tape for children. Analyzes some taped readings. Concludes that they make heavier use of stereotypes than written texts and in doing so raise ideological questions. Suggests that tapes offer shortcuts to semiotic competence, to interpreting the world through a kind of shorthand that is equally…

Delineates the continuing controversy between development and learning, and notes the evidence accumulating for some type of continuum in the processes. Introduces 10 research papers on reconceptualizing the intersection of the two processes and states the arguments for debate and presentation. (ET)

Investigated developmental differences in implicit memory performance. Subjects ranged in age from second grade to college level. Results suggested that there are two different components in implicit memory, one that shows no developmental difference and relies heavily on perceptual processing and one that shows an age-related or…

Examined infant verbal and nonverbal cognitive development for 1,937 pairs of same-sex 2-year-old twins. Found that verbal and nonverbal development correlated .42. Genetic factors were responsible for less than half of this phenotypic correlation. The genetic correlation between verbal and nonverbal abilities was only .30, suggesting that genetic…

Suggests a model for the development of mental representation. Explores empiricist and constructivist models and maintains that the constructivist model provides a better ground for theory building. Evaluates Piaget's constructivist account of the emergence of mental representation. Proposes that his account is insufficient and suggests a…

Proposes that conceptual change is constrained by the child's conceptual structures and the structures inherent in problem-solving tasks. Uses a microgenetic case study and group data to examine how interaction between strategies children bring to a task and the detailed task structure redirect children's attention and create the possibility of…

Two experiments used Headed Records memory model to examine preschoolers' performance on a variation of Perner's Smarties task, a false-beliefs test. Data indicated that when the computational demands imposed by the original task are reduced, young children can and do remember what they had thought about the contents of a tube even after its true…

Examined changes from age 7 to 82 years in processes responsible for preparation and interference control underlying alternation between two tasks. Found a U-shaped function for switch costs, with larger costs for young children and older adults. Age-related variance in task-switching performance was partially independent from age-related variance…

Tested in two studies 4- to 7-year-olds' face recognition by manipulating the faces' configural and featural information. Found that even with only a single 5-second exposure, most children could use configural and featural cues to make identity judgments. Repeated exposure and feedback improved others' performance. Even proficient memories were…

This article describes how children build increasingly abstract knowledge of linear measurement, emphasizing ways they relate space and number. Assessments indicate children struggle to understand measurement, especially concepts related to complex paths as in perimeter tasks. This article draws on developmental accounts of children's knowledge of…