Investigated the emergence of class and propositional reasoning skills as a function of the developing ability to coordinate increasingly complex negation and affirmation operations with children from grades 1, 3, 5, and 7. Found that children's reasoning follows a logical development sequence and that different groups of items account for…

Tested whether 2- to 4-year olds could reason with incongruent syllogisms when encouraged to use their imagination. Randomly assigned 2-, 3-, and 4-year olds to one of four conditions (no cue, word cue, fantasy planet, or imagery) and presented syllogistic reasoning problems with incongruent information. Found that in imagination conditions, 2-…

Two experiments examined toddlers' noun vocabularies and interpretations of names for solid and non-solid items. Results indicated that one side of the solidity-syntax-category organization mapping was favored. Seventeen- to 33-month olds do not systematically generalize names for solid things by shape similarity until they already know many…

Examines the role of creative expression in educational practices. Briefly outlines the work of educational leaders, including Mihaly Csikszentmihalyi, Howard Gardner, and Robert Sternberg, who are proponents of multi-faceted learning and creativity. Considers strategies for educational approaches that involve more creative invention, problem…

Meta-analysis of the A-not-B error was conducted, using logistic regression, on studies conducted before September 1997. Results replicated earlier findings, with exception that the number of trials at the A location was a significant predictor, and the number of locations was a significant predictor of the proportion of infants who searched…

Speeded performance on simple mental addition problems of 6- and 7-year-olds with and without mild mental retardation was modeled from a person perspective and an item perspective, both inferred from Siegler's work. Models from item response theory were used to test hypotheses. Found that all children follow same developmental path in acquiring…

Tests the hypothesis that an early adolescent brain growth plateau and spurt exists, and that this plateau and spurt influence students' ability to reason scientifically and to learn theoretical science concepts. Finds that measures of students' (n=210) prefrontal lobe activity correlated highly with scientific reasoning ability, and that these…

Two experiments investigated whether preverbal infants distinguish between humans and mammals. Study 1 found that 7-, 9-, and 11-month-olds distinguished humans from mammals in an object-examination task. Study 2 found that 7-month-olds but not 5-month-olds showed evidence for category discrimination with the 2-dimensional color photos of toy…

This response to Detterman and Thompson (1997) analyzes their criticisms of special education and presents evidence of the effectiveness of current instructional techniques for children with disabilities in contrast with the cognitive approaches favored by Detterman and Thompson. Assumptions about the significance of intelligence testing and…

Examined heritability of reading deficits in dyslexic subtypes. Found reading deficits were heritable in developmental phonological and surface dyslexics, with greater genetic contribution in the former. Findings suggest a partial independence in the development of cognitive processes involved in reading, and affirm accounts of surface dyslexia…

Three-year-old children (n=41) with mild learning problems and 41 typical children were given a battery consisting of seven simple cognitive tasks shown to contribute toward the differentiation of children with and without mild learning problems. Picture identification, oppositional concepts, identity discrimination, and semantic…

Calm or crying 9- and 12-week-olds sat facing a researcher who gazed into their eyes or at their forehead and delivered either a sucrose solution or pacifier or delivered nothing. Found that combining sweet taste and eye contact was necessary and sufficient for calm 9- and 12-week-olds to form a preference for the researcher, but not for crying…

Used data from the 1993 National Household Education Survey to analyze factors influencing cognitive readiness among 1,710 preschoolers. Results indicated that for high-risk children, culture-related activities were associated with higher cognitive development levels and lower variability in cognitive readiness. Parental involvement was more…

Addresses intergenerational risk factors affecting individual growth. Discusses how risk factors occurring during a mother's own developmental history can affect the postnatal environment, and how an intergenerational approach can aid in understanding cognitive development. (Author/SD)

This introductory article discusses the current status of our knowledge as well as critical research needs in the earliest stages of literacy, before formal schooling begins. It summarizes articles addressing this topic that are based on a three-day workshop on emergent and early literacy learning held in September, 2001. (Contains three…