Background: Behavioral genetic studies provide strong evidence that attention-deficit/hyperactivity disorder (ADHD) has a substantial genetic component. Yet, due to the complexity of the ADHD phenotype, questions remain as to the specific genes that contribute to this condition as well as the pathways from genes to behavior. Endophenotypes, or…

Visual selective attention is the ability to attend to relevant visual information and ignore irrelevant stimuli. Little is known about its typical and atypical development in early childhood. Experiment 1 investigates typically developing toddlers' visual search for multiple targets on a touch-screen. Time to hit a target, distance between…

The study describes students' patterns of thinking for statistical problems set in two different contexts. Fifteen students representing a wide range of experiences with high school mathematics participated in problem-solving clinical interview sessions. At one point during the interviews, each solved a problem that involved determining the…

This study investigates young children's humourous activity as a form of play and considers the implications on their cognitive development and learning. The study was conducted in an infant room of a university based group child care center and multiple qualitative data collection methods were used. The findings of this study suggest that during…

This paper examines the idea that particular representations differentially support and enhance different cognitive processes, in particular different types of reasoning. Five case studies were conducted consisting of detailed observations of pairs of middle-school students interacting with a computer-based learning environment. The software…

Studies from information-processing and language comprehension research have reported that background knowledge facilitates reading and writing. By comparing Chinese language development of heritage students who had home background in Chinese language and culture with those who did not, this study found that heritage learners did significantly…

This study tested two theoretical models of perceived understanding as a potential mediator of perceived teacher confirmation and students' ratings of instruction. Participants included 651 undergraduate students who completed survey measures. Results of structural equation modeling provided greater support for the confirmation process model,…

This article provides renewed converging empirical evidence for the hypothesis that asking test-takers to respond to text passages with multiple-choice questions induces response processes that are strikingly different from those that respondents would draw on when reading in non-testing contexts. Moreover, the article shows that the construct of…

This document is a detailed report on the second year of a 6-year study of the effectiveness of a state-sponsored preschool program for 4-year-old children from low-income families in the state of Washington. The Early Childhood Education and Assistance Program (ECEAP) takes a whole child approach, emphasizes the involvement of parents in planning…

Although many students simply do not visualize or draw very well, most students have capabilities and potentials that they, and perhaps their professors, are overlooking. Once elementary representations are mastered, it may be that drawing becomes progressively less of a learning tool as one moves through the educational system. But there is…

Three learning modules are described and investigated as they reflect different students' conceptions of and approaches to learning. The Schoolwork Module (SWM) focuses on task performance and involves a passive, incremental, piecemeal, and rote memory method of learning, parallel to what might be implied by the Information Processing model of…

A conceptual framework is provided for generating assessment tasks that provide an instructor with a richer description of student reasoning/thinking than is possible by simply giving students problems to solve. The application of this framework is illustrated with material from introductory statistics courses which focus on: (1) sampling; (2)…

One area explored in the second (in-depth) phase of the Learning in Science Project was "children's science," defined as views of the world and the meanings for words that children have and bring with them to science lessons. The investigation reported focuses on the concepts of "living" held by 32 students in four different…

One area explored in the second (in-depth) phase of the Learning in Science Project was "children's science," defined as views of the world and the meanings for words that children have and bring with them to science lessons. The investigation reported focuses on students' thinking regarding their views on friction. Students (N=47) were…

This study of the Apple Classroom of Tomorrow (ACOT) environment focused on the potential of a computer-saturated environment to facilitate students' thinking processes. Four approaches were used: (1) a longtitudinal approach to study student growth and development; (2) observations of students' behavior while writing with the computer to study…