A multidimensional scaling procedure is introduced that attempts to derive a spatial representation of stimuli unconfounded by the effect of subjects' degrees of familiarity with these stimuli. A Monte Carlo study investigating the extent to which the procedure recovers known parameters shows that the procedure succeeds in adjusting for…

The impact of four long-term knowledge variables on serial recall accuracy was investigated. Serial recall was tested for high and low frequency words and high and low phonotactic frequency nonwords in 2 groups: monolingual English speakers and French-English bilinguals. For both groups the recall advantage for words over nonwords reflected more…

The research reported in this paper is based on a survey carried out jointly by UNESCO and UNICEF with the collaboration of the Government of Mauritius. This survey involves 1800 fourth-grade pupils who were taken from 60 primary schools. The main purpose of this paper is to explore the home-related factors, which influence Numeracy performance at…

The authors address whether a hindsight bias exists for visual perception tasks. In 3 experiments, participants identified degraded celebrity faces as they resolved to full clarity (Phase 1). Following Phase 1, participants either recalled the level of blur present at the time of Phase 1 identification or predicted the level of blur at which a…

Little is known about the acoustic cues infants might use to selectively attend to one talker in the presence of background noise. This study examined the role of talker familiarity as a possible cue. Infants either heard their own mothers (maternal-voice condition) or a different infant's mother (novel-voice condition) repeating isolated words…

Semantic dementia (SD) is a progressive condition characterized by an insidious and gradual breakdown in semantic knowledge. Patients suffering from this condition gradually lose their knowledge of objects and their attributes, concepts, famous persons, and public events. In contrast, these patients maintain a striking preservation of…

Giant exploding volcanoes...asteroids crashing into Earth...continents floating across the oceans...massive pools of lava...violent earthquakes splitting continents--middle school students hold a variety of ideas about Earth, how it has changed over time, and what has caused these changes. Listening to students talk about how the world works is…

Recognition memory, involving the ability to discriminate between a novel and familiar object, depends on the integrity of the perirhinal cortex (PRH). Glutamate, the main excitatory neurotransmitter in the cortex, is essential for many types of memory processes. Of the subtypes of glutamate receptor, metabotropic receptors (mGluRs) have received…

The author provides a preliminary assessment of the extent to which a sample of 264 school social workers are aware of the Internet-related problems children are experiencing and proposes ways in which Internet-related problems could affect youths' social and academic competence and performance in a school setting. The findings have implications…

This study examined the extent to which student engagement is associated with a traditional assessment of student knowledge. In this study, ETS Business Major Field Test (MFT) scores were compared to student's self-reported survey responses to specific questions on the National Survey of Student Engagement (NSSE). Areas of the NSSE survey such as…

This paper presents a model--"hypertextual function"--to consider teachers' thinking, practice, and development in the use of technology. Hypertextual function is a multi-dimensional model linking a teacher's knowledge about students ("familiarity") and technology ("facility"), with a teacher's teaching practice of integrating technology with…

This study examines the factors influencing language and script choice in instant messaging (IM), a form of real-time computer-mediated communication, in a multilingual setting. Grounded in the New Literacy Studies, the study understands IM as a social practice involving texts, encompassing a range of literacy practices, within which a subset…

The purpose of the study reported in this article was to provide empirical evidence of students' views about a state performance assessment and its effects in science and social studies classrooms in Maryland. We developed 2 student questionnaires, 1 for each subject, and administered them to a statewide, stratified random sample of students in…

We investigated the effects of transparent fraction names on children's reasoning about fractions. U.S. and Korean first and second graders were tested using verbal and nonverbal measures. On a verbal task, Korean students were worse at interpreting their own conventional fraction names than interpreting modified terms with a more familiar word…

This study compared perceptions of mentoring relationships among early adolescents, middle adolescents, and emerging adults. In ten focus groups, 56 middle school, high school, and college students described relational experiences that were analyzed thematically. Differences in the characteristics of the mentors nominated by the youth across the…