How Accurate Is Peer Grading?

Previously we showed that weekly, written, timed, and peer-graded practice exams help increase student performance on written exams and decrease failure rates in an introductory biology course. Here we analyze the accuracy of peer grading, based on a comparison of student scores to those assigned by a professional grader. When students graded practice exams by themselves, they were significantly easier graders than a professional; overall, students awarded ≈25% more points than the professional did. This difference represented ≈1.33 points on a 10-point exercise, or 0.27 points on each of the five 2-point questions posed. When students graded practice exams as a group of four, the same student-expert difference occurred. The student-professional gap was wider for questions that demanded higher-order versus lower-order cognitive skills. Thus, students not only have a harder time answering questions on the upper levels of Bloom's taxonomy, they have a harder time grading them. Our results suggest that peer grading may be accurate enough for low-risk assessments in introductory biology. Peer grading can help relieve the burden on instructional staff posed by grading written answers-making it possible to add practice opportunities that increase student performance on actual exams.     

‘Straitjacket’ or ‘springboard for sustainable learning’? The implications of formative assessment practices in vocational learning cultures

In contrast to theoretical and empirical insights from research into formative assessment in compulsory schooling, understanding the relationship between formative assessment, motivation and learning in vocational education has been a topic neglected by researchers. The Improving Formative Assessment project (IFA) addresses this gap, using a sociocultural approach to explore the relationship between formative assessment practices and ‘learning cultures’ in vocational education. This article explores the influence of learning cultures in vocational education on the practice of formative assessment and evaluates critically two closely related questions. Why do some learning cultures foster formative assessment that leads to instrumental learning while others develop deeper forms of learning? When is formative assessment a springboard for sustainable learning, and when does it remain an instrumental straitjacket?     

Sex,drugs and science: the IOC’s and IAAF’s attempts to control fairness in sport

Abstract

This paper traces the history of two important policies in sport: rules against drugs and ‘ambiguous’ athletes in women’s events. We identify three phases in the work of the International Olympic Committee’s and International Amateur Athletic Federation’s medical committees: (1) from the mid-1960s to the 1970s, the medical grounding of the committees and the members’ worldviews encouraged the groups to enlist scientific techniques to solve drug use and sex ambiguity issues; (2) from the 1970s to the 1980s, administrative confusion underscored both committees, but scientific personnel gained legitimacy and furthered their own agendas; and (3) from the 1980s to the mid-1980s, the seeds of diversion in sex and drug tests were sown. The central finding of this study is that the stakeholders who shaped anti-doping and sex testing policies took for granted concerns regarding ethics and instead increasingly relied upon medical, scientific, and technical practices to define and control fairness in sport.     

Surveillance in ubiquitous network societies: normative conflicts related to the consumer in-store supermarket experience in the context of the Internet of Things

The Internet of Things (IoT) is an emerging global infrastructure that employs wireless sensors to collect, store, and exchange data. Increasingly, applications for marketing and advertising have been articulated as a means to enhance the consumer shopping experience, in addition to improving efficiency. However, privacy advocates have challenged the mass aggregation of personally-identifiable information in databases and geotracking, the use of location-based services to identify one’s precise location over time. This paper employs the framework of contextual integrity related to privacy developed by Nissenbaum (Privacy in context: technology, policy, and the integrity of social life. Stanford University Press, Stanford, 2010) as a tool to understand citizen response to implementation IoT-related technology in the supermarket. The purpose of the study was to identify and understand specific changes in information practices brought about by the IoT that may be perceived as privacy violations. Citizens were interviewed, read a scenario of near-term IoT implementation, and were asked to reflect on changes in the key actors involved, information attributes, and principles of transmission. Areas where new practices may occur with the IoT were then highlighted as potential problems (privacy violations). Issues identified included the mining of medical data, invasive targeted advertising, and loss of autonomy through marketing profiles or personal affect monitoring. While there were numerous aspects deemed desirable by the participants, some developments appeared to tip the balance between consumer benefit and corporate gain. This surveillance power creates an imbalance between the consumer and the corporation that may also impact individual autonomy. The ethical dimensions of this problem are discussed.     

The role of sweeteners in the diet of young children

The health and nutrition implications of high sugar intake for young children are discussed. Infants and young children prefer foods that taste sweet. Sugar substitutes used in moderation can provide a compromise for child care providers who want to offer nutritious food which young children will eat. This study examined sweetener preferences of young children, including a new sweetener (Sweet One^®). Participants (3–8 years of age) sampled a beverage and plain cottage cheese sweetened with either sugar or Sweet One^® as part of a sensory difference test. They also ranked four vanilla puddings sweetened with sugar and three FDA approved sweeteners. In the difference test, the subjects were able to tell the difference between sugar and Sweet One^® in the beverage, but not in the cottage cheese. There was no consensus among the panelists for a sweetener preference in the rank-order test.     

Naturalizing negativity: how journalism textbooks justify crime,conflict, and “bad” news

This critical analysis of U.S. journalism textbooks from 1894 to 2016 shows how texts across decades have (re)constructed a discourse of damage through news values emphasizing and rationalizing conflict and bad news. Findings are reported in the context of literature suggesting that negative news values foster a distorted sense of social relations, increase fear, and depress civic participation. Literature also indicates that non-journalists often view news through less conflict-oriented, and more value-laden, frames, suggesting that journalistic values are not natural or inevitable but subject to change. The discourse in journalism textbooks can be a key site for understanding and influencing journalism culture. Constructive alternatives to the dominant discourse are suggested.