Previous research shows that children evaluate the competence of others based on how effectively someone accomplished a goal, that is, based on the observed outcome of an action (e.g., number of attempts needed). Here, we investigate whether 5- to 10-year-old children and adults infer competence from how efficiently someone solves a task by…

Mathematical knowledge is constructed hierarchically from basic understanding of quantities and the symbols that denote them. Discrimination of numerical quantity in both symbolic and non-symbolic formats has been linked to mathematical problem-solving abilities. However, little is known of the extent to which overlap in quantity representations…

The present study examines 5- to 8-year-old children's relation reasoning in solving matrix completion tasks. This study incorporates a componential analysis, an eye-tracking method, and a microgenetic approach, which together allow an investigation of the cognitive processing strategies involved in the development and learning of children's…

Attempted cognitive training of Raven's Progressive Matrices using guided self-discovery, but without directly providing strategies. Thirty-six older and 36 younger adults were pretested, underwent training, and were posttested. Found no significant difference in improvement between younger and older adults. Failed to find evidence for successful…

Spatial thinking is a cognitive skill that can be used in everyday life, the workplace, and science to structure problems, find answers, and express solutions using the properties of space. It can be learned and taught formally to students using appropriately designed tools, technologies, and curricula. This report explains the nature and…

The influence of three variables on response to undecidability was studied: (1) dual- versus single-solution rules; (2) nature of the choice contrast, and (3) presence or absence of additional information to resolve the undecidability. Participants were college students and third, fourth, and fifth grade elementary school students. (RH)

Analyzes multiple components of planning, including problem representation, goal selection, a decision to plan, strategy choice, strategy execution, and monitoring. Analyzes three tasks typically used to study planning: the Tower of Hanoi; errand scheduling; and story comprehension. Argues that the components required to perform a planning task…

Tested three models of children's mathematics word-problem solving based on developmental differences in quantitative conceptual structures: (1) quantitative relations represented as ordered array of mental objects; (2) numbers represented on two tentatively coordinated mental number lines; and (3) numerical operations represented as objects on…

Results of two experiments support the finding of developmental change in the role of representation in perspective-taking tasks. Experiment 1, which involved 80 first-grade students with a mean age of 6.5 years, crossed task characteristics and response modes. Subjects either imagined an observer's movement around a fixed array or imagined an…

Proposes using a developmentally appropriate practice framework to determine if a sexual abuse prevention program takes into consideration the unique learning abilities of preschool children. Reviews definition of and statistics related to sexual abuse. Compares appropriate and inappropriate teaching practices in child sexual abuse prevention…

Describes a model of adaptation to the environment across the life span. Proposes that an individual's performance in an activity is affected not only by cognitive capacity but also by perceptions and definitions of the activity. Empirical support for the model, based on a survey of individuals' everyday experiences and on laboratory studies, is…

Examined the development of proportional reasoning by means of a temperature mixture task. Results show the importance of distinguishing between intuitive knowledge and formal computational knowledge of proportional concepts. Provides a new perspective on the relation of intuitive and computational knowledge during development. (GLR)

To date, the focus of research has been to demonstrate the link between interpersonal problem-solving skills and adjustment. Little attention has been given to the study of how specific interpersonal problem-solving abilities evolve or to age-related changes in overall ability. White students (N=30) identified as socially well-adjusted,…

Compared adolescents' (14 to 20 years) and young adults' (21 to 37 years) wisdom-related knowledge and judgment related to difficult and ill-defined life dilemmas. Rated responses along five wisdom criteria. Found that adolescents performed at lower levels than young adults but also demonstrated substantial age increments in performance.…

Previous studies of the development of correlational reasoning have focused on the interpretation of relatively simple data sets contained in 2 X 2 tables. In contrast, this study examined age trends in subjects' responses to problems involving more than two continuous variables. The research is part of a multi-year project to conceptualize…