An Experimental Study Evaluating Error Management Training for Learning to Operate a Statistical Package in an Introductory Statistics Course: Is Less Guidance More?

Developing the ability to operate a statistical package is a valuable student learning outcome in introductory statistics courses. Despite this, very little is known about the development of this specialised skill. This study aimed to evaluate the effectiveness of an Error-management training (EMT) strategy in learning to operate the statistical package SPSS. EMT uses minimal guidance to actively engage students in exploring the task domain and utilises errors made during training as valuable learning opportunities. EMT was compared to a conventional Guided training (GT) strategy which used error-avoidant, step-by-step instructions. A sample of 100 psychology students enrolled in a first year introductory statistics course were randomly allocated to either EMT or GT. Participants completed five fortnightly SPSS training sessions. Prior to the last training session, participants completed a post-training self-assessment task that assessed training transfer. The same self-assessment task was also completed as a follow-up in semester two. After controlling for covariates, the results of this study found no statistically significant difference between the training conditions on measures of training transfer. While a number of limitations hindered a conclusive result, issues and challenges discussed in this study provide valuable lessons for future research in this area

Low back pain risk factors in a large rural Australian Aboriginal community. An opportunity for managing co-morbidities?

BACKGROUND: Low back pain (LBP) is the most prevalent musculo-skeletal condition in rural and remote Australian Aboriginal communities. Smoking, physical inactivity and obesity are also prevalent amongst Indigenous people contributing to lifestyle diseases and concurrently to the high burden of low back pain. OBJECTIVES: This paper aims to examine the association between LBP and modifiable risk factors in a large rural Indigenous community as a basis for informing a musculo-skeletal and related health promotion program. METHODS: A community Advisory Group (CAG) comprising Elders, Aboriginal Health Workers, academics, nurses, a general practitioner and chiropractors assisted in the development of measures to assess self-reported musculo-skeletal conditions including LBP risk factors. The Kempsey survey included a community-based survey administered by Aboriginal Health Workers followed by a clinical assessment conducted by chiropractors. RESULTS: Age and gender characteristics of this Indigenous sample (n = 189) were comparable to those reported in previous Australian Bureau of Statistics (ABS) studies of the broader Indigenous population. A history of traumatic events was highly prevalent in the community, as were occupational risk factors. Thirty-four percent of participants reported a previous history of LBP. Sporting injuries were associated with multiple musculo-skeletal conditions, including LBP. Those reporting high levels of pain were often overweight or obese and obesity was associated with self-reported low back strain. Common barriers to medical management of LBP included an attitude of being able to cope with pain, poor health, and the lack of affordable and appropriate health care services. Though many of the modifiable risk factors known to be associated with LBP were highly prevalent in this study, none of these were statistically associated with LBP. CONCLUSION: Addressing particular modifiable risk factors associated with LBP such as smoking, physical inactivity and obesity may also present a wider opportunity to prevent and manage the high burden of illness imposed by co-morbidities such as heart disease and type-2 diabetes

An Experimental Study Comparing Two Different Training Strategies on how to use Statistical Packages in an Introductory Statistics Course

Statistics education reform advocated the use of statistical software packages, such as SPSS, Minitab, and R, in introductory statistics courses. However, little research has focused on finding effective methods of training students how to use these packages. This experimental study evaluated the effectiveness of two different training strategies. A sample of 100 first year psychology students were randomly allocated to either a Guided training (GT) strategy or an error management training (EMT) strategy. GT consisted of step-by-step instructions that aimed to explicitly direct participants through training to use the statistical package SPSS. EMT avoided step-by-step instructions, instead focusing on minimal instruction which aimed to engage participants in actively exploring the statistical package. In EMT, errors were viewed as beneficial to training as they help develop a deeper understanding of SPSS. Participants completed five statistical package training sessions across the semester. Following four of these training sessions, participants completed self-assessment tasks that measured training transfer performance. After controlling for statistical knowledge and self-assessment compliance, the results of the study indicated no statistically significant differences between the two training strategies. However, this conclusion must be interpreted with caution due to a number of study imitations which are discussed in this article

Spread pattern of the first dengue epidemic in the city of Salvador, Brazil

<p>Abstract</p> <p>Background</p> <p>The explosive epidemics of dengue that have been occurring in various countries have stimulated investigation into new approaches to improve understanding of the problem and to develop new strategies for controlling the disease. The objective of this study was to evaluate the characteristics of diffusion of the first dengue epidemic that occurred in the city of Salvador in 1995.</p> <p>Methods</p> <p>The epidemiological charts and records of notified cases of dengue in Salvador in 1995 constituted the source of data. The cases of the disease were georeferenced according to census areas (spatial units) and epidemiological weeks (temporal unit). Kernel density estimation was used to identify the pattern of spatial diffusion using the R-Project computer software program.</p> <p>Results</p> <p>Of the 2,006 census areas in the city, 1,400 (70%) registered cases of dengue in 1995 and the spatial distribution of these records revealed that by the end of 1995 practically the entire city had been affected by the virus, with the largest concentration of cases occurring in the western region, composed of census areas with a high population density and predominantly horizontal residences compared to the eastern region of the city, where there is a predominance of vertical residential buildings.</p> <p>Conclusion</p> <p>The pattern found in this study shows the characteristics of the classic process of spreading by contagion that is common to most infectious diseases. It was possible to identify the epicenter of the epidemic from which centrifugal waves of the disease emanated. Our results suggest that, if a more agile control instrument existed that would be capable of rapidly reducing the vector population within a few days or of raising the group immunity of the population by means of a vaccine, it would theoretically be possible to adopt control actions around the epicenter of the epidemic and consequently reduce the incidence of the disease in the city. This finding emphasizes the need for further research to improve the technology available for the prevention of this disease.</p

Desired Chinese medicine practitioner capabilities and professional development needs: a survey of registered practitioners in Victoria, Australia

Background The State of Victoria in Australia introduced Chinese medicine practitioner registration in 2000 and issued its education guidelines in late 2002 for introduction in 2005. This study obtained practitioners&#039; views on desired capabilities for competent Chinese medicine practice and to identify professional development needs. Methods A questionnaire, consisting of 28 predefined capabilities in four categories with a rating scale of importance from one to five, was developed and sent to all registered Chinese medicine practitioners in the State of Victoria, Australia in October, 2005. Results Two hundreds and twenty eight completed questionnaires were returned which represented a response rate of 32.5%. Of the four categories of capabilities, technical capabilities were considered to be the most important for clinical practice. Specifically, the ability to perform acupuncture treatment and/or dispense an herbal prescription was ranked the highest. In contrast, research and information management capabilities were considered the least important. The educational background of practitioners appeared to be an important factor influencing their rating of capabilities. Significantly, nearly double the number of practitioners with Australian qualifications than practitioners trained overseas valued communication as an important capability. For continuing professional education, clinical skills courses were considered as a priority while research degree studies were not. Conclusion Registered Chinese medicine practitioners viewed skills training as important but did not support the need for research and information management training. This represents a significant hurdle to developing Chinese medicine as a form of evidence-based healthcare

Study of Bc+B_c^+ decays to the K+K−π+K^+K^-\pi^+ final state and evidence for the decay Bc+→χc0π+B_c^+\to\chi_{c0}\pi^+

A study of $B_c^+\to K^+K^-\pi^+$ decays is performed for the first time using data corresponding to an integrated luminosity of 3.0 $\mathrm{fb}^{-1}$ collected by the LHCb experiment in $pp$ collisions at centre-of-mass energies of $7$ and $8$ TeV. Evidence for the decay $B_c^+\to\chi_{c0}(\to K^+K^-)\pi^+$ is reported with a significance of 4.0 standard deviations, resulting in the measurement of $\frac{\sigma(B_c^+)}{\sigma(B^+)}\times\mathcal{B}(B_c^+\to\chi_{c0}\pi^+)$ to be $(9.8^{+3.4}_{-3.0}(\mathrm{stat})\pm 0.8(\mathrm{syst}))\times 10^{-6}$. Here $\mathcal{B}$ denotes a branching fraction while $\sigma(B_c^+)$ and $\sigma(B^+)$ are the production cross-sections for $B_c^+$ and $B^+$ mesons. An indication of $\bar b c$ weak annihilation is found for the region $m(K^-\pi^+)<1.834\mathrm{\,Ge\kern -0.1em V\!/}c^2$, with a significance of 2.4 standard deviations.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-022.html, link to supplemental material inserted in the reference

Observation of an Excited Bc+ State

Using pp collision data corresponding to an integrated luminosity of 8.5 fb-1 recorded by the LHCb experiment at center-of-mass energies of s=7, 8, and 13 TeV, the observation of an excited Bc+ state in the Bc+π+π- invariant-mass spectrum is reported. The observed peak has a mass of 6841.2±0.6(stat)±0.1(syst)±0.8(Bc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Bc+ mass. It is consistent with expectations of the Bc∗(2S31)+ state reconstructed without the low-energy photon from the Bc∗(1S31)+→Bc+γ decay following Bc∗(2S31)+→Bc∗(1S31)+π+π-. A second state is seen with a global (local) statistical significance of 2.2σ (3.2σ) and a mass of 6872.1±1.3(stat)±0.1(syst)±0.8(Bc+) MeV/c2, and is consistent with the Bc(2S10)+ state. These mass measurements are the most precise to date

Study of charmonium production in b -hadron decays and first evidence for the decay Bs0

Using decays to φ-meson pairs, the inclusive production of charmonium states in b-hadron decays is studied with pp collision data corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. Denoting byBC ≡ B(b → C X) × B(C → φφ) the inclusive branching fraction of a b hadron to a charmonium state C that decays into a pair of φ mesons, ratios RC1C2 ≡ BC1 /BC2 are determined as Rχc0ηc(1S) = 0.147 ± 0.023 ± 0.011, Rχc1ηc(1S) =0.073 ± 0.016 ± 0.006, Rχc2ηc(1S) = 0.081 ± 0.013 ± 0.005,Rχc1 χc0 = 0.50 ± 0.11 ± 0.01, Rχc2 χc0 = 0.56 ± 0.10 ± 0.01and Rηc(2S)ηc(1S) = 0.040 ± 0.011 ± 0.004. Here and below the first uncertainties are statistical and the second systematic.Upper limits at 90% confidence level for the inclusive production of X(3872), X(3915) and χc2(2P) states are obtained as RX(3872)χc1 < 0.34, RX(3915)χc0 < 0.12 andRχc2(2P)χc2 < 0.16. Differential cross-sections as a function of transverse momentum are measured for the ηc(1S) andχc states. The branching fraction of the decay B0s → φφφ is measured for the first time, B(B0s → φφφ) = (2.15±0.54±0.28±0.21B)×10−6. Here the third uncertainty is due to the branching fraction of the decay B0s → φφ, which is used for normalization. No evidence for intermediate resonances is seen. A preferentially transverse φ polarization is observed.The measurements allow the determination of the ratio of the branching fractions for the ηc(1S) decays to φφ and p p asB(ηc(1S)→ φφ)/B(ηc(1S)→ p p) = 1.79 ± 0.14 ± 0.32

Study of J /ψ production in Jets

The production of J/ψ mesons in jets is studied in the forward region of proton-proton collisions using data collected with the LHCb detector at a center-of-mass energy of 13 TeV. The fraction of the jet transverse momentum carried by the J/ψ meson, z(J/ψ)≡pT(J/ψ)/pT(jet), is measured using jets with pT(jet)>20 GeV in the pseudorapidity range 2.5<η(jet)<4.0. The observed z(J/ψ)distribution for J/ψ mesons produced in b-hadron decays is consistent with expectations. However, the results for prompt J/ψ production do not agree with predictions based on fixed-order nonrelativistic QCD. This is the first measurement of the pT fraction carried by prompt J/ψ mesons in jets at any experiment