Influence of source credibility on students’ noticing and assessing comprehension obstacles in science texts

This study aims to analyse the effect of source credibility on students’ identification and assessment of comprehension obstacles in science texts. Source credibility was manipulated by providing 12th grade students with paragraphs supposedly taken from science textbooks or, alternatively, from students’ reports. The paragraphs contained information expected to be difficult to understand by the participating students. The students were instructed to report any comprehension obstacle they might find and to rate the comprehensibility of the paragraphs. There was no effect of source credibility on noticing and reporting comprehension obstacles in the conditions of our experiments. However, there was a significant finding regarding comprehensibility scores. The students rated the comprehensibility of the paragraphs supposedly taken from science textbooks higher than the comprehensibility of the same paragraphs supposedly taken from peer reports. The finding has implications on the way students approach the understanding of science texts. An enhancement of students’ feelings of competence in dealing with scientific subject matter would have a beneficial effect on students’ assessment and validation of information in science texts.     

Applied mathematical problem solving,modelling, applications,and links to other subjects — State,trends and issues in mathematics instruction

The paper will consist of three parts. In part I we shall present some background considerations which are necessary as a basis for what follows. We shall try to clarify some basic concepts and notions, and we shall collect the most important arguments (and related goals) in favour of problem solving, modelling and applications to other subjects in mathematics instruction. In the main part II we shall review the present state, recent trends, and prospective lines of development, both in empirical or theoretical research and in the practice of mathematics instruction and mathematics education, concerning (applied) problem solving, modelling, applications and relations to other subjects. In particular, we shall identify and discuss four major trends: a widened spectrum of arguments, an increased globality, an increased unification, and an extended use of computers. In the final part III we shall comment upon some important issues and problems related to our topic.Written version of a Survey Lecture given jointly at the Sixth International Congress on Mathematical Education (ICME-6, Budapest 1988). A condensation was published in a volume with contributions from the ICME-6 Theme Groups on Problem Solving, Modelling and Applications and on Mathematics and Other Subjects (Blum/Niss/Huntley 1989, pp. 1–21).     

Stigmatic beliefs toward a person with Alzheimer’s disease among high-school students: Does majority–minority status make a difference?

Research in the area of public stigma and Alzheimer disease (AD) is attracting increased attention in the last years. However, studies are limited to assessing the topic among adult persons. The aims of this study were to assess stigmatic beliefs toward a person with AD in high-school students and to examine whether majority–minority status is associated with stigmatic beliefs beyond other correlates of stigma.

A total of 460 high-school students aged 14–15 participated in the study. Approximately half (55.1%) were female and the rest male. The majority of participants were Jewish (64.6%) and the rest were Israeli Arabs. Students completed a self-administered structured questionnaire assessing public stigma, ageism, knowledge about AD, and familiarity with AD.

Results showed that high-school students reported relatively low levels of stigmatic beliefs toward a person with AD. Additionally, the majority–minority status had a unique contribution to the explanation of stigma, with Arab high-school students reporting higher levels of stigma toward a person with AD in comparison to Jewish students.

Our results stress the importance of developing intervention programs to reduce stigma toward persons with AD at an early age. These programs should be tailored to the cultural values and needs of specific groups.     

虚拟全景的链接——“虚拟现实”系列之三

该文通过实例介绍了虚拟全景之间、虚拟现实全景与URL以及静止图片之间的链接技术     

Buchbesprechungen

Ohne Zusammenfassung     

Affiliative motivation,school attachment,and aggression in school

School attachment is a robust predictor of adjustment in children and youth. Previous research has demonstrated effects of school context on student attachment, but individual‐level contributions have not been explored. Our study examined the role of affiliative orientation in school attachment and aggressive behavior in children and youth from Grades 3 through 12. A total of 834 students in three school districts completed self‐report measures of affiliative motivation, attachment to school, and frequency of physically and relationally aggressive acts. Results supported the hypothesis that students high in affiliative orientation reported higher levels of school attachment and lower levels of physical and relational aggression. Path analysis indicated that the relation of affiliative orientation to aggression was mediated by school attachment, but that the mediational effect was moderated by sex. Male students, and students of both sexes with low affiliative motivation, may receive special benefit from practices designed to increase school attachment. © 2006 Wiley Periodicals, Inc. Psychol Schs 43: 231–246, 2006.     

Measuring spontaneous and instructed evaluation processes during Web search: Integrating concurrent thinking-aloud protocols and eye-tracking data

Web searching for complex information requires to appropriately evaluating diverse sources of information. Information science studies identified different criteria applied by searchers to evaluate Web information. However, the explicit evaluation instructions used in these studies might have resulted in a distortion of spontaneous evaluation processes. Accordingly, the present study compared explicit evaluation instructions and neutral thinking-aloud instructions. Data from thinking-aloud protocols, eye tracking, and information problem-solving were collected from 30 participants equally distributed to two experimental conditions, that is, the Instructed Evaluation condition and the Spontaneous Evaluation condition. Instructed evaluation, as compared to spontaneous evaluation, resulted in more verbal utterances of quality-related evaluation criteria, in an increased attention focus on user ratings displayed on Web pages, and in better quality of decision making, although participants in the Instructed Evaluation condition were not able to better justify their decision as compared to participants in the Spontaneous Evaluation condition.     

Helsen, Gilis, and Weston (2006) do not err in questioning the optical error hypothesis as the only major account for explaining offside decision-making errors

Oudejans, Bakker, and Beek (2007) recognize several relevant aspects of offside judgements in association football in the paper by Helsen, Gilis, and Weston (2006). We agree that the existing knowledge base on offside assessment needs to be expanded for two reasons. First, from a theoretical point of view it is important to examine how assistant referees can learn to deal with the limitations of the human visual information processing system. Second, from a practical point of view it is relevant to understand better refereeing performances and to identify potential explanations for incorrect offside decisions that could impact on the final outcome of the game. Oudejans et al. (2007) believe we both misinterpreted the optical error hypothesis and that our data set was unsuited to test it. Below, we react to these comments.