An empirical test of a taxonomy of responses to anomalous data in science

The purpose of this study was to test a taxonomy of seven proposed responses to anomalous data. Our results generally supported the taxonomy but indicated that one additional type of response should be added to the taxonomy. We conclude that there are eight possible responses to anomalous data: (a) ignoring the data, (b) rejecting the data, (c) professing uncertainty about the validity of the data, (d) excluding the data from the domain of the current theory, (e) holding the data in abeyance, (f) reinterpreting the data, (g) accepting the data and making peripheral changes to the current theory, and (h) accepting the data and changing theories. We suggest that this taxonomy could help science teachers in two ways. First, science teachers could use the taxonomy to try to anticipate how students might react to anomalous data so as to make theory change more likely. Second, science teachers could use the taxonomy as a framework to guide classroom discussion about the nature of scientific rationality. In addition, the taxonomy suggests directions for future research. © 1998 John Wiley & Sons, Inc. J Res Sci Teach 35: 623–654, 1998.     

Chicken Club: schools and their relationship with families

Over time, schools have developed systems that include the families of children. Families often sign a home school agreement and attend parent forums or more formal meetings designed to plan provision for children with special educational needs. These endeavours, however, are arguably inadequate when the full influence of the family is properly acknowledged. Research makes clear that the main influencer on the child’s self-efficacy and therefore learning behaviours, is the family. This article reports findings from literature and a case study looking at making the most of the partnership between families and schools in order to meet the learning needs of individual children. It also addresses many barriers that families face in approaching schools and three ways schools in Cornwall, a rural county in South West England, are 'opening out’ their practice. The case study provides evidence of the progress children made in learning as a response to the new school and family partnership.     

Influence of cold-water immersion on indices of muscle damage following prolonged intermittent shuttle running

Abstract

The aim of this study was to assess the effects of cold-water immersion (cryotherapy) on indices of muscle damage following a bout of prolonged intermittent exercise. Twenty males (mean age 22.3 years, s = 3.3; height 1.80 m, s = 0.05; body mass 83.7 kg, s = 11.9) completed a 90-min intermittent shuttle run previously shown to result in marked muscle damage and soreness. After exercise, participants were randomly assigned to either 10 min cold-water immersion (mean 10°C, s = 0.5) or a non-immersion control group. Ratings of perceived soreness, changes in muscular function and efflux of intracellular proteins were monitored before exercise, during treatment, and at regular intervals up to 7 days post-exercise. Exercise resulted in severe muscle soreness, temporary muscular dysfunction, and elevated serum markers of muscle damage, all peaking within 48 h after exercise. Cryotherapy administered immediately after exercise reduced muscle soreness at 1, 24, and 48 h (P < 0.05). Decrements in isometric maximal voluntary contraction of the knee flexors were reduced after cryotherapy treatment at 24 (mean 12%, s _x  = 4) and 48 h (mean 3%, s _x  = 3) compared with the control group (mean 21%, s _x  = 5 and mean 14%, s _x  = 5 respectively; P < 0.05). Exercise-induced increases in serum myoglobin concentration and creatine kinase activity peaked at 1 and 24 h, respectively (P < 0.05). Cryotherapy had no effect on the creatine kinase response, but reduced myoglobin 1 h after exercise (P < 0.05). The results suggest that cold-water immersion immediately after prolonged intermittent shuttle running reduces some indices of exercise-induced muscle damage.     

Sample and Population Diagram - A Teaching Tool

This article describes a simple, yet effective way to introduce and also review the concepts of ‘sample’ and ‘population’ using a Sample and Population Diagram.     

Conducting tests of hypotheses: The need for an adequate sample size

This article addresses the importance of obtaining a sample of an adequate size for the purpose of testing hypotheses. The logic underlying the requirement for a minimum sample size for hypothesis testing is discussed, as well as the criteria for determining it. Implications for researchers working with convenient samples of a fixed size are also considered, and suggestions are given about the steps that should be taken when they are not able to obtain a large enough sample. Finally, the implications of not having an adequate sample size for hypothesis testing are discussed to highlight the importance of determining sample size prior to conducting one’s study.     

从夸饰与虚构的运用看《战国策》的文学价值

具有重要史料价值的《战国策》,因大量纵横游说之辞中对夸饰与虚构手法的运用而富有浓厚的学色彩,其夸饰与虚构的体现形式多种多样。《战国策》的学成就,在先秦史传学中,许多方面具有独创性,对后世学的发展产生过深元的影响。     

Type of Positive Interdependence and Affiliation Motive in an Asynchronous, Collaborative Learning Environment

In this study, we investigated the effect of type of positive interdependence (roles, rewards, roles-plus-rewards, or no structure) and affiliation motives (high vs. low) in an asynchronous, collaborative learning environment. College reentry students worked together in small, fully online discussion groups that lasted for seven days. Results indicated that participants in groups given roles plus rewards interacted with their teammates significantly more than those given rewards only or no-structured-interdependence conditions. A significant positive correlation suggested that participants with higher numbers of interactions attained higher posttest scores. However, no significant differences were found in achievement by type of interdependence or by affiliation motive. Results also revealed that type of interdependence and affiliation motive had a significant impact on student attitudes. Implications for integrating small group work in online higher education settings are discussed.     

‘I like being a lab Rat’: student experiences of research participation

Undergraduate students are often expected to be participants in academic research. However, decisions relating to student participation in research are typically based on speculation or educator assumptions rather than a solid research base. We conducted three studies to investigate student experiences of research participation. These included online surveys (Study 1), semi-structured interviews (Study 2), and analysis of reflective essays (Study 3). A range of pedagogic and ethical issues were considered including motivation to participate, distress, and the educational value of participation. Findings suggest that the experience provides students with important opportunities to learn about research methodology and ethical issues which inform their own research practice. Further, students cite additional non-academic benefits of research participation such as self-discovery and networking opportunities. Negative experiences typically consisted of nervousness prior to the first laboratory study or boredom, though for some students (e.g. those uncomfortable in social situations) engagement in research may lead to anxiety. We conclude that participation in research has pedagogic value to students, and educators should promote those elements of the research experience (e.g. critiquing studies, networking with researchers) that are most beneficial. However, researchers and educators should also actively work to reduce apprehension and minimise potential distress.