Peer Assessment Training in Teacher Education: Effects on performance and perceptions

The implementation of peer assessment receives much attention in teacher education. This paper reports the effects of peer assessment training on the performance of student teachers. Ninety-three student teachers were randomly assigned to control groups and experimental groups. The experimental groups were trained in defining performance criteria, giving feedback and writing assessment reports. This was done through peer assessment tasks that were embedded in a redesigned course. Analyses of data derived from peer assessment reports written by the students showed that the experimental groups surpassed the control groups in the quality of the assessment skill. As a result of the training, students from the experimental groups also scored significantly higher grades for the end products of the course than students from the control groups. The results of the questionnaire showed that all students were significantly more satisfied with the redesigned course.     

Effective practices for creating transformative informal science education programs grounded in Native ways of knowing

There are a growing number of informal science education (ISE) programs in Native communities that engage youth in science education and that are grounded in Native ways of knowing. There is also a growing body of research focusing on the relationship between culture, traditional knowledge, and science education. However, there is little research documenting how these programs are being developed and the ways in which culture and Western science are incorporated into the activities. This study outlines effective practices for using Native ways of knowing to strengthen ISE programs. These effective practices may also be used to promote change in formal education. The authors combine an overview of current research in informal science education with personal interviews with educators engaged in ISE programs offered to youth both on and off tribal reservations as well as experts in Indigenous education. Participating individuals and programs included Native communities across the United States, including Alaska and Hawai??i. Keeping in mind that each community is unique, ISE programs that are grounded in Native ways of knowing will benefit by utilizing the effective practices outlined here as a guide for starting or strengthening existing ISE programs relevant to the needs of their communities.     

The differential effects of task complexity on domain-specific and peer assessment skills

In this study the relationship between domain-specific skills and peer assessment skills as a function of task complexity is investigated. We hypothesised that peer assessment skills were superposed on domain-specific skills and will therefore suffer more when higher cognitive load is induced by increased task complexity. In a mixed factorial design with the between-subjects factor task complexity (simple, n?=?51; complex, n?=?59) and within-subjects factor task type (domain-specific, peer assessment), secondary school students studied four integrated study tasks, requiring them to learn a domain-specific skill (i.e. identifying the six steps of scientific research) and to learn how to assess a fictitious peer performing the same skill. Additionally, the students performed two domain-specific test tasks and two peer assessment test tasks. The interaction effect found on test performance supports our hypothesis. Implications for the teaching and learning of peer assessment skills are discussed.     

Media Coverage of Public Health Epidemics: Linking Framing and Issue Attention Cycle Toward an Integrated Theory of Print News Coverage of Epidemics

Using framing and issue attention cycle as theoretical frameworks, this study examined how print media frame public health epidemics, such as mad cow disease, West Nile virus, and avian flu. We found that “action” and “consequence” were the two frames journalists employed consistently to construct stories about epidemics in the New York Times, the newspaper used for this case study. The prominence of other frames varied with diseases. We also found different attention cycle patterns for each disease. Coverage of public health epidemics was highly event based, with increased news coverage corresponding to important events such as newly identified cases and governmental actions. We found that media concerns and journalists' narrative considerations regarding epidemics did change across different phases of development and across diseases. This suggests that journalists emphasize different narrative considerations at different stages of the issue development cycle, based on the specificity of each disease.     

Understanding the effects of training programs for vulnerable adults on social inclusion as part of continuing education

According to the increasing rates of unemployment and poverty a significant share of the European population can be considered at-risk-of-social exclusion. In order to combat social exclusion adult education seemed to be a possible tool, which can increase social inclusion among adult learners. This study explores factors relating to training programs considered as adult and continuing education which enhance social inclusion for vulnerable adults and their life environment. The results indicate that after following the training programs as part of continuing learning, the participants show a significant increase in activation and internalisation as well as participation and connection (as processes of social inclusion). Moreover, non-parametric correlation analysis and logistical regression analysis shows that the training design feature transfer possibilities is significantly related to the increase of almost all social inclusion variables. Besides this direct surroundings and learning contents and activities only significantly relates to the increase of social inclusion variables of activation and internalisation and care to the social inclusion variables of participation and connection.     

Distribution of moisture in reconstructed oil paintings on canvas during absorption and drying: A neutron radiography and NMR study

Moisture is a driving factor in the long-term mechanical deterioration of canvas paintings, as well as for a number of physico–chemical degradation processes. Since the 1990s a number of publications have addressed the equilibrium hygroscopic uptake and the hygro-mechanical deformation of linen canvas, oil paint, animal glue, and ground paint. In order to visualise and quantify the dynamic behaviour of these materials combined in a painting mock-up or reconstruction, we have performed custom-designed experiments with neutron radiography and nuclear magnetic resonance (NMR) imaging. This paper reports how both techniques were used to obtain spatially and temporally resolved information on moisture content, during alternate exposure to high and low relative humidity, or in contact with liquids of varying water activities. We observed how the canvas, which is the dominant component in terms of volumetric moisture uptake, absorbs and dries rapidly, and, due to its low vapour resistance, allows for vapour transfer towards the ground layer. Moisture desorption was generally found to be faster than absorption. The presence of sizing glue leads to a local increase of moisture content. It was observed that lining a painting with an extra canvas results in a damping effect: i.e. absorption and drying are significantly slowed down. The results obtained by NMR are complementary to neutron radiography in that they allow accurate monitoring of water ingress in contact with a liquid reservoir. Quantitative results are in good agreement with adsorption isotherms. The findings can be used for risk analysis of paintings exposed to changing micro-climates or subjected to conservation treatments using water. Future studies addressing moisture-driven deformation of paintings can make use of the proposed experimental techniques.     

Development of feedforward control in a dynamic manual tracking task

To examine the development of feedforward control during manual tracking, 117 participants in 5 age groups (6 to 7, 8 to 9, 10 to 11, 12 to 14, and 15 to 17 years) tracked an accelerating dot presented on a monitor by moving an electronic pen on a digitizer. To remain successful at higher target velocities, they had to create a predictive model of the target's motion. The ability to track the target at higher velocities increased, and the application of a feedback-based step-and-hold strategy decreased with age, as shown by increases in maximum target velocity and decreases in number of stops between ages 6–7 and 8–9 and between ages 8–9 and 10–11. The ability to exploit feedforward control in a dynamic tracking task improves significantly with age.     

Kodak's PHOTO CD System

Abstract

As described in the different announcements made by Kodak, their PHOTO CD originally appeared as a product targeted at the general public. However, the purpose of this article is to describe the system which Kodak is going to produce and which is specifically directed towards professionals. This will be of interest to the educational system for its potential use of photographs and images. As well as its attraction for the general public and the professional, PHOTO CD is characterized by the following two important aspects:

‐ The system does not in any way affect the way pictures are actually taken; conventional films are used which are only transferred onto optical disks after being developed.

— The pictures can be viewed equally well on an ordinary television, or on a compatible PC micro or Macintosh.

PHOTO CD, then, seems to be a means of constructing picture banks which are available for editing. Recalling existing pictures poses no greater problem than integrating new pictures into the bank,” on the other hand, from the number of possible ways of viewing pictures, one can foresee quite complex use (multimedia or micro) as well as simple use (diaporama on a television).