We examined the development of numerical magnitude representations of fractions and decimals from fourth to 12th grade. In Experiment 1, we assessed the rational number magnitude knowledge of 200 Chinese fourth, fifth, sixth, eighth, and 12th graders (92 girls and 108 boys) by presenting fraction and decimal magnitude comparison tasks as well as…

Throughout the life span, we are capable of representing quantities in the absence of language, or nonsymbolically. Additionally, over the course of development, we learn many symbolic measurement systems for representing quantities such as time and number. Despite substantial evidence of a relation between the acquisition of symbolic and…

Trauma and the exposure of trauma among adolescents can significantly impact a child's ability to find success in the school setting. Trauma-affected students can experience difficulties physically, mentally, emotionally, and developmentally, affecting their academics and behavior. This study explored the perceptions of teachers and the causes and…

Researchers have identified sources of individual differences in writing across beginning and developing writers. The aim of the present study was to further clarify the sources of this variability by investigating the extent to which there are differences in genetic and environmental factors underlying the associations between lexical diversity,…

In theoretical cognitive science, there is a tension between highly structured models whose parameters have a direct psychological interpretation and highly complex, general-purpose models whose parameters and representations are difficult to interpret. The former typically provide more insight into cognition but the latter often perform better.…

Cunningham and Stanovich reported a longitudinal investigation over 10 years that examined the unique influence of exposure to print in explaining individual differences on various measures of reading achievement and declarative (general) knowledge. The present study replicated their investigation with a larger number of participants and…

The purpose of this study was to investigate the contributions of domain-general cognitive resources and different forms of arithmetic development to individual differences in pre-algebraic knowledge. Children (n = 279, mean age = 7.59 years) were assessed on 7 domain-general cognitive resources as well as arithmetic calculations and word problems…

In this review of literature we examine empirical research of individual differences in younger readers' knowledge and use of expository text structures. The goal of this review is to explore the influence of reader and text characteristics in order to better understand the instructional needs of elementary school readers. First we review research…

Four studies examined the relationship between students' ability and the learning processes the students engaged in when they acquired knowledge from their classroom experiences. The research was based on a model of learning processes during knowledge acquisition that identifies critical learning experiences and predicts what is learned and…

This interview study gathered information about the prior knowledge and thinking of kindergarten to third- graders regarding the supply of water, heat, and light to modern homes. Findings indicated that students possessed only limited and spotty knowledge about utilities in modern homes. Within general trends, there was evidence of growth in…

This report is based on the assessment of ICT (information and communication technology) literacy conducted in October 2005. It describes the development of a computer-based tool for assessing ICT literacy among school students and the application of that tool with a nationally representative sample of approximately 7,400 students from Years 6 and…

Studied reading comprehension, vocabulary, general knowledge, and print exposure of 11th graders who completed reading battery 10 years earlier. Found that first-grade reading ability predicted all 11th-grade outcomes--even when cognitive ability was partialed out--and was linked to print exposure, even after 11th-grade reading comprehension…