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Methodological Difficulties (methodological + difficulty)
Selected AbstractsDefining the nursing contribution to patient outcome: lessons from a review of the literature examining nursing outcomes, skill mix and changing rolesJOURNAL OF CLINICAL NURSING, Issue 1 2001Karen Spilsbury BA , ,A review of the evidence to define the nursing contribution to patient outcome is presented. The review relies on work related to nursing sensitive outcomes, skill mix and changing roles. , ,Methodological difficulties associated with these studies are highlighted. , ,Areas requiring further research are discussed. , ,It is suggested that experimental evidence is not always appropriate, when attempting to describe nursing activity. The authors advocate that new methodologies, in particular practitioner-centred research, are needed to unpack the nature of nursing. [source] A CROSS-CULTURAL EXAMINATION OF THE LINK BETWEEN CORPORAL PUNISHMENT AND ADOLESCENT ANTISOCIAL BEHAVIOR,CRIMINOLOGY, Issue 1 2000RONALD L. SIMONS Several studies with older children have reported a positive relationship between parental use of corporal punishment and child conduct problems. This has lead some social scientists to conclude that physical discipline fosters antisocial behavior. In an attempt to avoid the methodological difficulties that have plagued past research on this issue, the present study used a proportional measure of corporal punishment, controlled for earlier behavior problems and other dimensions of parenting, and tested for interaction and curvilinear effects. The analyses were performed using a sample of Iowa families that displayed moderate use of corporal punishment and a Taiwanese sample that demonstrated more frequent and severe use of physical discipline, especially by fathers. For both samples, level of parental warmth/control (i.e., support, monitoring, and inductive reasoning) was the strongest predictor of adolescent conduct problems. There was little evidence of a relationship between corporal punishment and conduct problems for the Iowa sample. For the Taiwanese families, corporal punishment was unrelated to conduct problems when mothers were high on warmth/control, but positively associated with conduct problems when they were low on warmtwcontrol, An interaction between corporal punishment and warmth/Wcontro1 was found for Taiwanese fathers as well. For these fathers, there was also evidence of a curvilinear relationship, with the association between corporal punishment and conduct problems becoming much stronger at extreme levels of corporal punishment. Overall, the results are consistent with the hypothesis that it is when parents engage in severe forms of corporal punishment, or administer physical discipline in the absence of parental warmth and involvement, that children feel angry and unjustly treated, defy parental authority, and engage in antisocial behavior. [source] Drug education: myth and realityDRUG AND ALCOHOL REVIEW, Issue 1 2001GRAEME HAWTHORNE Abstract Recently there has been an increase in Australian public funds for drug education. The accompanying rhetoric asserts that it is to enable abstinence among young people. This contradicts some State Government education guidelines endorsing harm minimization. A literature search of the key electronic databases, drug agency libraries, the Internet and reference lists identified evaluation research in school-based drug education. There is little evidence to support the new public rhetoric. The predictors of adolescent drug use are social and personal; schools can have little effect on these. Four models of drug education are described. Schools, however, mix-and-match activities from different models, and exposure is too slight for major effects on behaviours. Although methodological difficulties affect findings, none of the drug education models show consistent behavioural effects over time. There is a mismatch between the new public rhetoric and the evaluation research literature. Reasons for this are explored, including that there are two stakeholder groups, one with exaggerated ideological anti-drug messages and the other with more realistic perspectives about what schools can reasonably achieve. The paradox is that the rhetoric is needed for continued funding, yet this same rhetoric sets up criteria which doom drug education to failure. [source] Cancer as a chronic illness?EUROPEAN JOURNAL OF CANCER CARE, Issue 3 2002Reconsidering categorization, exploring experience Cancer as a chronic illness? Reconsidering categorization and exploring experience This article explores the different ways that user experience is defined and conceptualized, and the various policy and professional contexts in which emphasis is placed on exploring users' views. We go on to examine the experience of cancer as a chronic illness and argue that, although there are common features in the experience of cancer and people with chronic illness, the differences are too significant and cancer should not be defined as a chronic condition. We conclude with a consideration of the methodological difficulties of documenting user experience and identify the need for further methodological development. [source] Analysis of microbial community functional diversity using sole-carbon-source utilisation profiles , a critiqueFEMS MICROBIOLOGY ECOLOGY, Issue 1 2002Juliet Preston-Mafham Abstract Information on functional diversity (metabolic potential) is essential for understanding the role of microbial communities in different environments. Variations of the commercially available BIOLOG bacterial identification system plates are now widely used to assess functional diversity of microorganisms from environmental samples, based on utilisation patterns of a wide range (up to 95) of single carbon sources. There are many problems as well as benefits of using the approach, but the former are often disregarded. Here the basis of the approach is summarised, including type of plate to use, treatment of samples, replication, incubation conditions, monitoring of plates, and statistical analysis. The pros and cons of its use are critically assessed, inherent biases and limitations are pointed out and methodological difficulties are considered. Possible ways of overcoming some of the difficulties are suggested. [source] Below-ground carbon flux and partitioning: global patterns and response to temperatureFUNCTIONAL ECOLOGY, Issue 6 2008C. M. Litton Summary 1The fraction of gross primary production (GPP) that is total below-ground carbon flux (TBCF) and the fraction of TBCF that is below-ground net primary production (BNPP) represent globally significant C fluxes that are fundamental in regulating ecosystem C balance. However, global estimates of the partitioning of GPP to TBCF and of TBCF to BNPP, as well as the absolute size of these fluxes, remain highly uncertain. 2Efforts to model below-ground processes are hindered by methodological difficulties for estimating below-ground C cycling, the complexity of below-ground interactions, and an incomplete understanding of the response of GPP, TBCF and BNPP to climate change. Due to a paucity of available data, many terrestrial ecosystem models and ecosystem-level studies of whole stand C use efficiency rely on assumptions that: (i) C allocation patterns across large geographic, climatic and taxonomic scales are fixed; and (ii) c. 50% of TBCF is BNPP. 3Here, we examine available information on GPP, TBCF, BNPP, TBCF : GPP and BNPP : TBCF from a diverse global data base of forest ecosystems to understand patterns in below-ground C flux and partitioning, and their response to mean annual temperature (MAT). 4MAT and mean annual precipitation (MAP) covaried strongly across the global forest data base (37 mm increase in MAP for every 1 °C increase in MAT). In all analyses, however, MAT was the most important variable explaining observed patterns in below-ground C processes. 5GPP, TBCF and BNPP all increased linearly across the global scale range of MAT. TBCF : GPP increased significantly with MAT for temperate and tropical ecosystems (> 5 °C), but variability was high across the data set. BNPP : TBCF varied from 0·26 to 0·53 across the entire MAT gradient (,5 to 30 °C), with a much narrower range of 0·42 to 0·53 for temperate and tropical ecosystems (5 to 30 °C). 6Variability in the data sets was moderate and clear exceptions to the general patterns exist that likely relate to other factors important for determining below-ground C flux and partitioning, in particular water availability and nutrient supply. Still, our results highlight global patterns in below-ground C flux and partitioning in forests in response to MAT that in part confirm previously held assumptions. [source] Eating disorders in adults with intellectual disabilityJOURNAL OF INTELLECTUAL DISABILITY RESEARCH, Issue 6 2000S. Gravestock Abstract There is an increasing focus on the nutrition of people with intellectual disability (ID), but less interest in the range of eating disorders (EDs) that they may exhibit and the bio-psycho-social impact of these conditions. Despite diagnostic and methodological difficulties, psychopathology and ED research studies suggest that 3,42% of institutionalized adults with ID and 1,19% of adults with ID in the community have diagnosable EDs. Weight surveys indicate that 2,35% of adults with ID are obese and 5,43% are significantly underweight, but the contribution of diagnosable EDs is unknown. Such data and case reports suggest that EDs are associated with considerable physical, behavioural, psychiatric and social comorbidity. Review papers have focused on the aetiology and treatment of pica, rumination, regurgitation, psychogenic vomiting and food faddiness/refusal. Emerging clinical issues are the development of appropriate diagnostic criteria, multimodal assessment and clinically effective treatment approaches. Key service issues include staff training to improve awareness, addressing comorbidity and access issues, and maintaining support for adults with ID and EDs, and their carers. Research should confirm the multifaceted aetiology and comorbidity of EDs. Then multicomponent assessment and treatment models for EDs can be developed and evaluated. [source] The effect of school resources on pupil attainment: a multilevel simultaneous equation modelling approachJOURNAL OF THE ROYAL STATISTICAL SOCIETY: SERIES A (STATISTICS IN SOCIETY), Issue 3 2007Fiona Steele Summary., Improving educational achievement in UK schools is a priority, and of particular concern is the low achievement of specific groups, such as those from lower socio-economic backgrounds. An obvious question is whether we should be improving the outcomes of these pupils by spending more on their education. The literature on the effect of educational spending on the achievement of pupils has some methodological difficulties, in particular the endogeneity of school resource levels, and the intraschool correlations in pupils' responses. We adopt a multi-level simultaneous equation modelling approach to assess the effect of school resources on pupil attainment at age 14 years. The paper is the first to apply a simultaneous equation model to estimate the effect of school resources on pupils' achievement, using the newly available national pupil database and pupil level annual school census. [source] The Evolutionary Forms of the Religious Life: A Cross-Cultural, Quantitative AnalysisAMERICAN ANTHROPOLOGIST, Issue 4 2008STEPHEN K. SANDERSON ABSTRACT, Previous cross-cultural studies of religion's evolution that employed Swanson's High Gods measure are plagued by methodological difficulties, especially the lack of proper statistical controls. Here, we attempted to rectify this, using the Standard Cross-Cultural Sample to test five hypotheses employing multivariate statistical techniques. Results provided weak support for Swanson's Sovereign Groups hypothesis concerning High Gods and also limited support for a previously unexplored factor: writing and record keeping. In phase two of the study, we introduced a new measure, the Stage of Religious Evolution, based on Anthony Wallace's typology. When this new dependent variable was substituted for High Gods, much stronger results were obtained. The best predictors of Stage of Religious Evolution were mode of subsistence economy, writing and record keeping, and total population size. These findings allowed us to construct a new evolutionary interpretation of the development of different modes of religious life. [source] PHENOPSIS, an automated platform for reproducible phenotyping of plant responses to soil water deficit in Arabidopsis thaliana permitted the identification of an accession with low sensitivity to soil water deficitNEW PHYTOLOGIST, Issue 3 2006Christine Granier Summary ,,The high-throughput phenotypic analysis of Arabidopsis thaliana collections requires methodological progress and automation. Methods to impose stable and reproducible soil water deficits are presented and were used to analyse plant responses to water stress. ,,Several potential complications and methodological difficulties were identified, including the spatial and temporal variability of micrometeorological conditions within a growth chamber, the difference in soil water depletion rates between accessions and the differences in developmental stage of accessions the same time after sowing. Solutions were found. ,,Nine accessions were grown in four experiments in a rigorously controlled growth-chamber equipped with an automated system to control soil water content and take pictures of individual plants. One accession, An1, was unaffected by water deficit in terms of leaf number, leaf area, root growth and transpiration rate per unit leaf area. ,,Methods developed here will help identify quantitative trait loci and genes involved in plant tolerance to water deficit. [source] Nitrogen balance in forest soils: nutritional limitation of plants under climate change stressesPLANT BIOLOGY, Issue 2009H. Rennenberg Abstract Forest ecosystems with low soil nitrogen (N) availability are characterized by direct competition for this growth-limiting resource between several players, i.e. various components of vegetation, such as old-growth trees, natural regeneration and understorey species, mycorrhizal fungi, free-living fungi and bacteria. With the increase in frequency and intensity of extreme climate events predicted in current climate change scenarios, also competition for N between plants and/or soil microorganisms will be affected. In this review, we summarize the present understanding of ecosystem N cycling in N-limited forests and its interaction with extreme climate events, such as heat, drought and flooding. More specifically, the impacts of environmental stresses on microbial release and consumption of bioavailable N, N uptake and competition between plants, as well as plant and microbial uptake are presented. Furthermore, the consequences of drying,wetting cycles on N cycling are discussed. Additionally, we highlight the current methodological difficulties that limit present understanding of N cycling in forest ecosystems and the need for interdisciplinary studies. [source] The Politics of Perception: Use and Abuse of Transparency International's Approach to Measuring CorruptionPOLITICAL STUDIES, Issue 4 2009Staffan Andersson The annual Corruption Perceptions Index (CPI), published by Transparency International (TI), has had a pivotal role in focusing attention on corruption. Despite recent critiques of the CPI, it remains highly influential on research into the causes of corruption and is also extensively used to galvanise support for measures to fight corruption. In this article we explore the CPI in more depth in order to highlight how the index has been used for political ends which may not always turn out to be supportive of anti-corruption efforts. The argument is developed in four sections: in the first, we focus on Transparency International's definition of corruption, highlighting some conceptual difficulties with the approach adopted and its relationship to the promotion of ,good governance' as the principal means of combating corruption. In the second section, we outline some methodological difficulties in the design of the Corruption Perceptions Index. Although the CPI has been much criticised, we demonstrate in the third section that the index continues to exercise great influence both in academic research and in the politics of anti-corruption efforts, particularly as exercised by Transparency International itself. In the final section we argue that the CPI contributes to the risk of creating a ,corruption trap' in countries where corruption is deeply embedded, as development aid is increasingly made conditional on the implementation of reforms which are impossible to achieve without that aid. [source] Rural population growth in Sweden in the 1990s: unexpected reality or spatial,statistical chimera?POPULATION, SPACE AND PLACE (PREVIOUSLY:-INT JOURNAL OF POPULATION GEOGRAPHY), Issue 3 2006Jan Amcoff Abstract Although estimating rural population change at first glance seems simple, it in fact involves methodological difficulties and requires the accommodation of definitional ambiguities. This article addresses the matter of urban spillover in rural population development. Simply stated, ,urban spillover' here refers to how urban localities tend to push a ring of diffuse urban growth outwards as they expand in area. If constant delimitations of urban localities and rural areas are employed, their definitions will de facto change, and what is actually diffuse urban growth will be treated as rural. The effect of urban spillover in different methods of estimating rural population change are illustrated here using Swedish data, which are suitable for this purpose given their high spatial resolution. The data do not support the existence of any actual rural population growth in Sweden in the 1990s, apart from the effects of urban spillover. Copyright © 2006 John Wiley & Sons, Ltd. [source] Practitioner Review: Cognitive rehabilitation for children with acquired brain injuryTHE JOURNAL OF CHILD PSYCHOLOGY AND PSYCHIATRY AND ALLIED DISCIPLINES, Issue 4 2005Jenny Limond Background:, The need to address acquired cognitive impairments is increasing in child populations seen across a range of settings. However, current clinical practice following brain injury in children does not necessarily incorporate the use of cognitive rehabilitation models or techniques. The aim of this paper is to review the literature in this area. Methods:, All published interventions targeting the cognitive domains of attention, memory and/or executive function that could be identified were reviewed. Different cognitive rehabilitation techniques are briefly described and the clinical and research implications of the findings are discussed. Results:, Eleven papers, involving 54 children and adolescents receiving intervention, were identified. This literature describes generalised cognitive rehabilitation programmes as well as more specific strategies targeting focal deficits. Conclusions:, There is an absence of randomised controlled trials and a very limited number of studies using other methodological approaches, providing at this time no conclusive evidence for the efficacy of cognitive rehabilitation for children with acquired brain injury, but a clear need to address a range of methodological difficulties in this field of enquiry. [source] Growth with or without Equity?ASIAN-PACIFIC ECONOMIC LITERATURE, Issue 2 2002The distributional impact of Indonesian development This paper surveys articles that have examined and sought to explain the distributional change experienced in Indonesia during the past 30 years of rapid economic development. The literature is critically evaluated, and methodological difficulties and current data limitations are highlighted and point the way for advances in future research. [source] | |||||||||||||||||||