Misconceptions in physical science among non-science background students

Research in Science Education -     

The influence of a 6.5% carbohydrate-electrolyte solution on performance of prolonged intermittent high-intensity running at 30 degrees C

Nine male student games players consumed either flavoured water (0.1 g carbohydrate, Na+ 6 mmol x l(-1)), a solution containing 6.5% carbohydrate-electrolytes (6.5 g carbohydrate, Na+ 21 mmol x l(-1)) or a taste placebo (Na+ 2 mmol x l(-1)) during an intermittent shuttle test performed on three separate occasions at an ambient temperature of 30 degrees C (dry bulb). The test involved five 15-min sets of repeated cycles of walking and variable speed running, each separated by a 4-min rest (part A of the test), followed by 60 s run/60 s rest until exhaustion (part B of the test). The participants drank 6.5 ml x kg(-1) of fluid as a bolus just before exercise and thereafter 4.5 ml x kg(-1) during every exercise set and rest period (19 min). There was a trial order effect. The total distance completed by the participants was greater in trial 3 (8441 +/- 873 m) than in trial 1 (6839 +/- 512, P < 0.05). This represented a 19% improvement in exercise capacity. However, the trials were performed in a random counterbalanced order and the participants completed 8634 +/- 653 m, 7786 +/- 741 m and 7099 +/- 647 m in the flavoured water (FW), placebo (P) and carbohydrate-electrolyte (CE) trials, respectively (P = 0.08). Sprint performance was not different between the trials but was impaired over time (FW vs P vs CE: set 1, 2.41 +/- 0.02 vs 2.39 +/- 0.03 vs 2.39 +/- 0.03 s; end set, 2.46 +/- 0.03 vs 2.47 +/- 0.03 vs 2.47 +/- 0.02 s; main effect time, P < 0.01). The rate of rise in rectal temperature was greater in the carbohydrate-electrolyte trial (rise in rectal temperature/duration of trial, degrees C x h(-1); FW vs CE, P < 0.05; P vs CE, N.S.). Blood glucose concentrations were higher in the carbohydrate-electrolyte than in the other two trials (FW vs P vs CE:rest, 4.4 +/- 0.1 vs 4.3 +/- 0.1 vs 4.2 +/- 0.1 mmol x l(-1); end of exercise, 5.4 +/- 0.3 vs 6.4 +/- 0.6 vs 7.2 +/- 0.5 mmol x l(-1); main effect trial, P < 0.05; main effect time, P < 0.01). Plasma free fatty acid concentrations at the end of exercise were lower in the carbohydrate-electrolyte trial than in the other two trials (FW vs P vs CE: 0.57 +/- 0.08 vs 0.53 +/- 0.11 vs 0.29 +/- 0.04 mmol x l(-1); interaction, P < 0.01). The correlation between the rate of rise in rectal temperature (degrees C x h(-1)) and the distance completed was -0.91, -0.92 and -0.96 in the flavoured water, placebo and carbohydrate-electrolyte conditions, respectively (P < 0.01). Heart rate, blood pressure, plasma ammonia, blood lactate, plasma volume and rate of perceived exertion were not different between the three fluid trials. Although drinking the carbohydrate-electrolyte solution induced greater metabolic changes than the flavoured water and placebo solutions, it is unlikely that in these unacclimated males carbohydrate availability was a limiting factor in the performance of intermittent running in hot environmental conditions.     

Non use of health information kiosks examined in an information needs context

Whilst great emphasis has rightly been placed on the increased availability and use of health information, little research has been undertaken into the non use of such material, particularly with regard to electronic sources. Computer transactional log data from health information touch screen kiosks, collected as part of an ongoing Department of Health-funded study being carried out by City University, showed that females in the 55-74 age group were particularly under-represented as users. To explore reasons for this, in-depth interviews were carried out with 13 non-kiosk-using, primary-care out-patients fitting this profile, at a surgery which had a kiosk that was being monitored. Subjects were interviewed at length about their information needs and information-seeking behaviour, to determine reasons (if any) they might have had for non-kiosk use. The study utilized an interview schedule and technique loosely based on the 'Sense-Making' methodology of Brenda Dervin (Talk Presented at the International Communication Association Annual Meeting, May 1983, Dallas, Texas, USA. Available from: http://communicationsbsohio-stateedu/sense-making/art/artdervin83html.). Findings elicited many factors accounting for non use of the system. The first and major source of information remained the doctor, with written or other sources only being consulted where recommended or provided. There was evidence that patients wanted little more than the minimum information or instructions required to deal with their condition. Many appeared unaware of the presence of the kiosk and others assumed either that it was not for patient use or that it would not serve their needs. The methodology proved itself, with certain caveats, to be an appropriate vehicle for this kind of exploratory work.     

E-government policy and practice: A theoretical and empirical exploration of public e-procurement

The purpose of this paper is to theoretically and empirically explore how public e-procurement policies are translated into practice. The theoretical argument draws on actor network theory (ANT), coupled with Colebatch’s [Colebatch, H. K. (2002). Policy (2nd ed.). Maidenhead, Open University Press.] social construct of policy, to analyze the actors, actions, and circumstances through which understanding of public e-procurement comes to stabilize (or not) into a coherent policy for action. Drawing on three case studies of central government agencies in Italy, Scotland, and Western Australia, we suggest new intellectual perspectives and methodological heuristics that may assist researchers and practitioners analytical efforts in examining sociotechnical change and the implications for policy development and implementation.     

Personal librarian programs in medical and academic health sciences libraries: a preliminary study

Objective:This preliminary study examined how personal librarian programs are implemented within medical and academic health sciences libraries. Increasing awareness of these programs and how they are implemented could create a larger and more accessible knowledge base for establishing best practices that similar libraries can look to when creating their own programs.Methods:To characterize existing programs, a twenty-two-item survey was sent to MEDLIB-L, AAHSL-ALL, ARCL-HSIG, and PSS-Lists email listservs in October 2018 to reach a broad audience of medical and academic health sciences librarians. Survey responses were analyzed using Qualtrics and Excel.Results:Of the 2,882 potential email recipients, 49 survey sessions were recorded, and a total of 38 survey sessions were completed (1.3% response rate). Of the 38 completed responses, representatives of 12 libraries (31.5%) reported that a personal librarian program had been implemented at their institution. For implementation, eight libraries involved 1–5 librarians, and four involved 6–10. Librarians were assigned 50–100 (n=6), 101–150 (n=1), or 151 or more (n=1) students each. The identified programs served medical students (n=11), nursing students (n=7), health professions students (n=7), dental students (n=2), and students in other fields (n=4). Services provided and communication methods were also identified.Conclusions:The personal librarian programs identified by the survey were uniquely structured to best meet the needs of their users, though similarities in implementation existed across institutions. Medical and academic health sciences libraries can look to these libraries as practical examples when starting their own personal library programs.     

Gender differences in high school students' efficacy-expectation/performance discrepancies across four subject matter domains

This study investigated gender-related differences in the efficacy-expectation/performance discrepancies of high school students across four subject matter domains. Participants (N = 131) completed American College Testing (ACT) assessments in English, mathematics, reading, and science. Additionally, prior to each domain-specific test, students rated their perceived self-efficacy expectation for successful performance on that test. As anticipated, most students reporting greater efficacy expectation also tended to perform at higher levels, particularly in mathematics. Unexpectedly, the majority of student efficacy/performance discrepancy scores fell outside the congruent range in all content areas. Approximately equal numbers of male and female students inaccurately estimated their performance capabilities, with most noncongruent students tending to fall into either the extreme overestimation/underestimation categories. Implications are discussed regarding the application of these findings to refining educational methods, and enhancing self-motivation in educational settings.     

Operational Definitions and Assessment of Higher-Order Cognitive Constructs

The educational psychology literature is replete with references to higher-order cognitive constructs, such as critical thinking and creativity. Presumably, these constructs represent the primary processes and outcomes that educators should promote in students. For these constructs to be maximally useful, they must be transformed into specific operational definitions that lead to reliable and valid assessment strategies. Minimizing overlap in the definitions and assessment of different concepts would contribute to an orderly accumulation of knowledge about the constructs in question. The ideal would be for each construct to have a definition that is distinct from the definitions of other cognitive constructs. Although higher-order cognitive constructs have much surface appeal, their utility is tied to the clarity and fidelity of their definitions and assessment procedures.