Search results for ""author philip david zelazo""

This monograph presents the pediatric portion of the National Institutes of Health (NIH) Toolbox Cognition Battery (CB) of the NIH Toolbox for the Assessment of Neurological and Behavioral Function. The NIH Toolbox is an initiative of the Neuroscience Blueprint, a collaborative framework through which 16 NIH Institutes, Centers, and Offi ces jointly support neuroscience-related research, to accelerate discoveries and reduce the burden of nervous system disorders. The CB is one of four modules that measure cognitive, emotional, sensory, and motor health across the lifespan. The CB is unique in its continuity across childhood, adolescence, early adulthood, and old age, and in order to help create a common currency among disparate studies, it is also available at low cost to researchers for use in large-scale longitudinal and epidemiologic studies. Chapter 1 describes the evolution of the CB; methods for selecting cognitive subdomains and instruments; the rationale for test design; and a validation study in children and adolescents, ages 3 to 15 years. Subsequent chapters feature detailed discussions of each test measure and its psychometric properties (Chapters 2–6), the factor structure of the test battery (Chapter 7), the effects of age and education on composite test scores (Chapter 8), and a final summary and discussion (Chapter 9). As the chapters in this monograph demonstrate, the CB has excellent psychometric properties, and the validation study provided evidence for the increasing differentiation of cognitive abilities with age.

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This monograph concerns the psychological processes underlying the development of executive function, or the conscious control of thought and action. It has long been clear that these processes change considerably in early childhood, transforming a relatively stimulus-driven toddler into a child capable of flexible, goal-directed problem solving. However, the nature of these processes has remained elusive. In a programmatic series of 9 experiments, the authors examine circumstances that help or hinder executive function in 3- to 4-year-old children. The results provide the basis for a revision of their Cognitive Complexity and Control (CCC-r) theory, according to which there are age-related increases in the complexity of the rules that children can formulate and use when solving problems. The revised theory (a) specifies more clearly the circumstances in which children will have difficulty using rules at various levels of complexity, (b) provides a more detailed account of how to determine the complexity of rules required in a task, (c) takes account of both the activation and inhibition of rules as a function of experience, and (d) highlights the importance of considering intentionality in the study of executive function.

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