When the atmosphere warms it rains and ice melts: seventh grade students’ conceptions of a climate system

Although many environmental and science educators have explored students’ conceptual understandings, misconceptions, and knowledge of the greenhouse effect, global warming, and climate change, few have investigated the ways students conceptualize climate as a system or how components of the system influence climate. Therefore, the purpose of this study was to begin the process of understanding how US students conceptualize a climate system. A total of 42 seventh grade students (ages 12–13) from the Midwest completed an open-response task. From the inductive analysis of student written responses, 22 codes emerged that reflected students’ conceptions of the climate system. From these codes, three path diagrams were constructed that illustrate these students’ conceptions about how a climate system influences climate and how greenhouse gases and global warming impact the climate system. A generalized model of students’ conception of a climate system was generated. Students in this study conceptualized a climate system in a unidirectional, linear, cause and effect relationship that emphasized the atmospheric component of the climate system.     

How the web was won … by some

HILJ readers may have encountered the phrase library 2.0 which has polarised librarians, with some sceptical whether library 2.0 offers anything new. Others are confident that the convergence of service goals and ideas with emerging Web 2.0 technologies will lead to a new generation of library services. Andrew Tattersall's article, 'How the Web was Won', belongs in the latter camp. His thesis is that Web 2.0 and Library 2.0 have opened up a whole new world for exploration by information and library professionals. Although the Web has created problems for the modern day explorer, potentially there is a bright future for information professionals if they are to succeed in deploying the resources.     

Impact of a Submaximal Warm-Up on Endurance Performance in Highly Trained and Competitive Male Runners

Purpose: The purpose of this investigation was to examine the effects of a submaximal running warm-up on running performance in male endurance athletes (n = 16, M_age = 21 ± 2 years, M_VO2max = 69.3 ± 5.1 mL/kg/min). Method: Endurance performance was determined by a 30-min distance trial after control and submaximal running warm-up conditions in a randomized crossover fashion. The warm-up began with 5 min of quiet sitting, followed by 6 min of submaximal running split into 2-min intervals at speeds corresponding to 45%, 55%, and 65% maximal oxygen consumption (VO₂max). A 2-min walk at 3.2 km/hr concluded the 13-min warm-up protocol. For the control condition, participants sat quietly for 13 min. VO₂ and heart rate (HR) were determined at Minutes 0, 5, and 13 of the pre-exercise protocol in each condition. Results: At the end of 13 min prior to the distance trial, mean VO₂ (warm-up = 14.1 ± 2.2 mL/kg/min vs. control = 5.5 ± 1.7 mL/kg/min) and mean HR (warm-up = 105 ± 11 bpm vs. control = 67 ± 11 bpm) were statistically greater (p < .001) in the warm-up condition compared with the control condition. The distance run did not statistically differ (p = .37) between the warm-up (7.8 ± 0.5 km) and control (7.7 ± 0.6 km) conditions; however, effect size calculation revealed a small effect (d = 0.2) in favor of the warm-up condition. Thus, the warm-up employed may have important and practical implications to determine placing among high-level athletes in close races. Conclusions: These findings suggest a submaximal running warm-up may have a small but critical effect on a 30-min distance trial in competitive endurance athletes. Further, the warm-up elicited increases in physiological variables VO₂ and HR prior to performance; thus, a submaximal specific warm-up should warrant consideration.     

The Necessity of Studio Art as a Site and Source for Dissertation Research

The issue raised by the authors in this article question why studio art continues to be ignored as a site and source for research in art education. The necessity of the field to be able to participate within the research community in addressing cultural, social, educational and political concerns is acknowledged. It is argued, however, that the exclusive use of methods of inquiry that align with the conventions of social science research has been done at the expense of fully appreciating the capacity of artistic research undertaken in studio contexts. This tendency is especially prevalent in doctoral research in higher education. Three accounts of dissertation research are given that incorporate studio activity as a central agency of inquiry in conceptualising and theorising issues. Each highlights the capacity of art practice to reveal insights that are a consequence of what the researcher did in the studio setting as issues, ideas and interpretive stances emerged, and problems were re‐conceptualised. What is different in these accounts from more mainstream approaches to research is the readiness to accept that constructing new knowledge is a creative and critical process.     

Development and validation of scales to measure environmental responsibility,character development,and attitudes toward school

This investigation examines the use of structural equation modeling (SEM) procedures to develop and validate scales to measure environmental responsibility, character development and leadership, and attitudes toward school for environmental education programs servicing middle school children. The scales represent outcomes commonly of interest to environmental education programs and also to after‐school and positive youth development activities. First, we developed the scales using confirmatory factor analysis (CFA) and then we used multi‐group longitudinal CFA to cross‐validate the model with data collected before participation in the environmental education program, immediately after the program, and three months later. The results support a three‐factor model, producing three scales that appear to be valid and reliable.     

Verbal inactivity in tutorial groups,under conditions of varying preparation and leadership

The effects of variations in preparation and leadership on verbal inactivity in tutorial groups were investigated in a field-experimental setting. A factorial, randomized, longitudinal design was employed, with controls imposed over many of the identifiable extraneous effects. Four groups (n = 15) discussed problematic case study material under conditions of varying preparation (prepared vs. unprepared) and leadership (emergent vs. assigned leadership), for eight consecutive weekly sessions of one hour's duration. The principal hypotheses were tested by Chisquare analysis, and a cautious approach was adopted to the interpretation of statistically significant results, in that preparation or leadership effects were only taken as being of any theoretical or practical significance if they reached significance in at least three of the eight discussion sessions. Both preparation and leadership influenced verbal inactivity in groups. The obtained leadership effects were explained in terms of interaction-expectation theory, and behaviour modelling.