Resistance to extinction as a function of percentage of reward: A reinforcement-level interpretation

Three experiments investigated the effects of percentage of reinforcement on the resistance to extinction of an instrumental running response. In Experiment 1, with N-length held constant, 47% reinforcement during acquisition generated greater resistance to extinction (R_n) than did 77%. In Experiment 2, this result was replicated with both functional N-length and number of N-R transitions held constant. In Experiment 3, R_n was shown to be a function of both N-length and percentage of reinforcement. The results of all three experiments were discussed in terms of Capaldi’s reinforcement level theory and possible alternative explanations.     

Self-regulated learning microanalysis as a tool to inform professional development delivery in real-time

Elementary teachers in the United States are tasked with teaching all core subject matter and have training that involves many topics, which may limit the depth of their subject matter knowledge. Since they have low content knowledge, they often feel less confident about teaching technical subject matter, such as science (Bleicher Journal of Science Teacher Education 17:165–187, 2006). The problem of low confidence of elementary teachers for science instruction is exacerbated when they are expected to teach science using inquiry (Hanuscin et al. Science Education 95:145–167, 2010). Self-regulated learning microanalysis, which supports both instruction and assessment, can help teachers reflect on their learning processes. This technique may provide clues for teachers to improve strategies for learning and give information to professional development instructors to inform teacher professional development experiences. The purpose of this study was to examine self-regulatory learning cycles that fourteen elementary teachers experienced while engaged in learning about inquiry during a professional development. Results of this study showed that before the professional development, teachers reported low self-efficacy but high task value and perceived instrumentality for learning about inquiry. As the professional development progressed, teachers improved their goal setting skills, self-monitoring performance, and learning tactics. The self-regulated learning microanalysis revealed information not communicated in the professional development experience, which led to adaptation of the activities in real-time to meet the needs indicated on the self-regulated learning microanalysis reports. Measuring teacher learning processes allowed the professional development instructors to pinpoint difficulties and successes during the learning tasks, which aided in precise adaptation of experiences for teacher needs.     

Research psychographics of the nurse professoriate in a Philippine comprehensive University

This two-pronged study seeks to ascertain the research psychographic characteristics of a select group of nurse professoriate (n=37) in a comprehensive university in the Philippines. The quantitative part of the study had an adapted survey questionnaire, which profiled the demographic and psychographic characteristics of the respondents. Defining the qualitative aspect of the inquiry was an in-depth interview with five (5) of the respondents chosen purposively to triangulate the data yielded by the questionnaire. Data were treated statistically and interpretively to describe the phenomenon under inquiry. It is interesting to note that while the nurse professoriate had shown a positive attitude towards research, variables such as time constraints, lack of research knowledge, research support structure and motivation hinder them from doing research activities. Implications of the study to reculturing, restructuring and reformulating efforts in research are also discussed.     

Using Newspapers to Examine the Nature of Science

This paper describes the use of newspapers in a philosophy of science course.Using the newspaper as a required text facilitates student exploration of the nature of science by examining current scientific topics. Students in the course read The New York Times on a weekly basis. The articles from the Times support two pedagogical activities: newspaper journals and weekly discussions. The journals consist of free responses to published articles and serve as a means to encourage students to direct their own learning. The weekly discussions permit a free exchange of ideas about controversial topics while facilitating discourse about a multitude of topics concerning the nature of science. This paper describes the course design and provides several examples of how newspaper articles can be used as pedagogical resource.     

Environmental education research in Brazil: some highlights from theses and dissertations

Abstract

This article discusses an analysis of abstracts of Brazilian theses and dissertations on environmental education from a database organised and maintained by a group of researchers in the EArt Project (www.earte.net). In presenting extracts of key trends in this dataset, our aim is to provide a snapshot of the many possible approaches to, and histories of, Brazilian environmental education research. The data also allow us to raise some questions that explore possible ‘blank spots’, ‘blind spots’ and ‘bald spots’ in Brazilian research on environmental education. Given the temporal development of the research field since the 1980s, we illustrate these ‘spots’ by exploring data related to epistemological and methodological diversity, from the viewpoint of knowledge areas as well as the graduate programmes that have been developing research on environmental education. Finally, we draw a picture of the methodological trends that have been privileged by Brazilian researchers, and pose questions as to what is needed in shaping an agenda for research on environmental education in Brazil into the future.     

Vitamins: essential dietary constituents discovered

Until a century or more ago disease was generally attributed to the presence of some undesirable feature. The realization that disease could be due to the absence of a desirable factor was revolutionary. During the 18th and 19th centuries, however, foundations were laid for the recognition in the 20th century that to prevent some diseases certain ‘accessory substances’—the vitamins—were essential in the diet. This article tells the story of their discovery, their current significance, and future trends in vitamin research.     

Does maximalist footwear lower impact loading during level ground and downhill running?

A new model of running shoes which features an extreme cushioning and an oversized midsole, known as the maximalist (MAX) was launched. This design claims to provide excellent shock absorption, particularly during downhill running. This study sought to assess the effects of MAX on the external impact loading, footstrike pattern, and stride length during level ground and downhill running on an instrumented treadmill. Twenty-seven distance runners completed four 5-minute running trials in the two footwear conditions (MAX and traditional running shoes (TRS)) on a level surface (0%) and downhill (10%-declination). Average and instantaneous loading rates (ILRs), footstrike pattern and stride length were measured during the last minute of each running trial. A 12% greater ILR was observed in downhill running with MAX (p?=?.045; Cohen’s d?=?0.44) as compared to TRS. No significant difference was found in the loading rates (p?>?.589) and stride length (p?=?.924) when running on a level surface. Majority of runners maintained the same footstrike pattern in both footwear conditions. Findings of this study suggested that MAX might not reduce the external impact loading in runners during level and downhill treadmill running. Instead, this type of footwear may conceivably increase the external impact loading during downhill treadmill running.