Are we safe? NLM's household products database

This column features an overview of the Division of Specialized Information Services, National Library of Medicine Household Products Database. Basic searching techniques are presented, as well as a brief overview of the data contained in this file. The Household Products Database contains information on chemical ingredients in various products used in U.S. homes.     

Specific Learning Difficulties and Peer Support

This article describes a project aimed at supporting secondary-school pupils with specific learning difficulties, using a peer support approach. Feedback obtained from the school's special educational needs co-ordinator and from the pupils themselves indicated some degree of success for the project in terms of developments in the pupils' response to learning and in their self-perceptions. The involvement of older pupils as contributors to the group is identified as one factor in the success of the project. The project format and the content of the group sessions are described in sufficient detail to enable colleagues to run similar groups should they wish.     

Factors Influencing New Entrant Dairy Farmer's Decision-making Process around Technology Adoption

Purpose: The aims of this paper are to (1) evaluate the main factors influencing grazing system technology adoption among new entrant (NE) dairy farmers within Europe and the Irish pasture-based dairy industry, and (2) to determine the extent to which economic factors influence decision-making around technology adoption and use among NEs to the Irish dairy industry.

Methodology: Multivariate analysis is used to investigate the associations between region, education level, previous experience in dairy farming, herd size, age and the farmer's perception of the usefulness (PU) and ease-of-use of a technology (PEOU), and the likelihood of that technology being adopted.

Findings: The results of this study identify a high rate of grazing, artificial insemination (AI) and financial management technology adoption among NE dairy farmers whose technology decisions are primarily motivated by financial considerations and are closely related to the PU and PEOU scores of the technology. Grassland measurement had the lowest adoption rate (51%) compared to AI (86%) and farm financial management (84%).

Practical Implications: The substantial importance of PU and PEOU to technology adoption decisions indicates that future research, extension and education programmes should place increased emphasis on the benefits and usability of key technologies in addition to evaluating their scientific merit.

Originality/Value: For the first time information assessing technology adoption amongst new dairy farmers is available. This has the potential to improve and increase extension and education for new dairy farmers in a future post-quota environment.     

Effects of Introducing Classroom Peflormance Assessments on Student Learning

How can performance assessments be used as part of regular instruction? Will this raise student performance on external achievement measures? What aspects of examinee performance improve on the assessment exercises?     

Test preparation in New Jersey: inquiry‐oriented and didactic responses1

As testing becomes more prevalent as a policy tool in the Anglo‐Saxon world, debates continue as to whether it supports central reforms of instruction or leads to a kind of ‘teaching to the test’ that invalidates results and undermines more challenging instruction. This paper reports on a three‐year study of mathematics testing of nine‐year‐olds in New Jersey. Using a mix of surveys and direct observations with interviews, we conclude that New Jersey's testing policies contributed to both results. Where teachers feel more pressure, they respond with short‐term test preparation and focus on more didactic instructional strategies. When they know more about state and national standards and have the opportunity to learn more, they are inclined to use more inquiry‐oriented approaches and integrate test preparation with regular instruction.     

Quelques Erreurs Pouvant être Liées à Une Difficulté à Concevoir un Ensemble Comme un Objet Distinct De Ses éléments Chez Des étudiants Et Des étudiantes Universitaires

As a first step of a project on learning difficulties in elementary set theory, we carried out a study aimed at identifying some of the difficulties encountered by a group of 21 mathematics majors taking a course on logic and set theory. In this paper, we shall discuss one of the difficulties that we observed, namely a difficulty in conceiving a set as an object distinct from its elements, i.e. failing to fully grant sets the status of objects. This difficulty may be related to the following three types of errors that we observed in the students' first assignment: (1) confusing belonging and inclusion, (2) confusing the union of sets A, B, C, ... with the set whose elements are A, B, C, … and (3) adding or deleting curly brackets. We shall present excerpts from the students' work illustrating these three types of errors and explain how they may be related to a difficulty in conceiving a set as an object distinct from its elements.     

Stability and change of moral disengagement and its impact on aggression and violence in late adolescence

Stability and change of moral disengagement were examined in a sample of 366 adolescents from ages 14 to 20 years. Four developmental trajectories were identified: (a) nondisengaged group that started with initially low levels followed by an important decline, (b) normative group that started with initially moderate levels followed by a decline, (c) later desister group that started with initially high-medium levels followed by an increase from 14 to 16 years and an even steeper decline from 16 to 20 years, and (d) chronic group that started with and maintained medium-high levels. The results attest that adolescents who maintained higher levels of moral disengagement were more likely to show frequent aggressive and violent acts in late adolescence.