829 resultados para Social hypothesis testing
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This research covers the topic of social housing and its relation to thermal comfort, so applied to an architectural and urban intervention in land situated in central urban area of Macaíba/RN, Brazil. Reflecting on the role of design and use of alternative building materials in the search for better performance is one of its main goals. The hypothesis is that by changing design parameters and choice of materials, it is possible to achieve better thermal performance results. Thus, we performed computer simulations of thermal performance and natural ventilation using computational fluid dynamics or CFD (Computational Fluid Dynamics). The presentation of the thermal simulation followed the methodology proposed in the dissertation Negreiros (2010), which aims to find the percentage of the amount of hours of comfort obtained throughout the year, while data analysis was made of natural ventilation from images generated by the images extracted from the CFD. From model building designed, was fitted an analytical framework that results in a comparison between three different proposals for dwellings housing model, which is evaluated the question of the thermal performance of buildings, and also deals with the spatial variables design, construction materials and costs. It is concluded that the final report confirmed the general hypotheses set at the start of the study, it was possible to quantify the results and identify the importance of design and construction materials are equivalent, and that, if combined, lead to gains in thermal performance potential.
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The literature on preferences for redistribution has paid little attention to the effect of social mobility on the demand for redistribution, which is in contrast with the literature on class-voting, where studies on the effect of social mobility has been very common. Some works have addressed this issue but no systematic test of the hypotheses connecting social mobility and preferences has been done. In this paper we use the diagonal reference models to estimate the effect of origin and destination class on preferences for redistribution in a sample of European countries using data from the European Social Survey. Our findings indicate that social origin matters to a little extent to explain preferences, as newcomers tend to adopt the preferences of the destination class. Moreover, we have found only limited evidence supporting the acculturation hypothesis and not support for the status maximization hypothesis. Furthermore, the effect of social origin varies largely between countries. In a second step of the analysis we investigate what are the national factors explaining this variation. The empirical evidence we present leads to conclude that high rates of upward social mobility sharply reduce the effect of social origin on preferences for redistribution
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The financial and economic crisis which originated in 2008 has had a severe impact on the population of the Southern European countries. The economic policies of austerity and public deficit control, as well as the neo-liberal and conservative social policies are redefining the public social protection systems, in particular the Social Services. In order to get to understand the current situation, we shall explain how the Social Services were developed in Spain and analyse the causes and consequences of the economic crisis. The working hypothesis is that the greater the increase on the population’s needs, the more developed the Social Services should be. We carried out a descriptive analysis of the situation as far as the social impacts of the crisis per region are concerned. We tested the hypothesis through a parametric model of analysis of variance (one-way ANOVA) triangulating with the non-parametric Kruscal-Wallis test. The working hypothesis failed. The regions with better developed Social Services show a lower level of poverty and social exclusion. The challenges that the public Social Services system faces in times of crisis is three-fold: 1) re-modelling of local administration and transferring of the municipal Social Services responsibilities to the regional administration; 2) an increase of the population at risk of poverty and social exclusion 3) impact on social policies.
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The Internet has changed the way in which organizations communicate with their publics, and museums are not an exception. The consolidation of Web 2.0 has not only given museums access to a powerful new tool for disseminating information, but has involved significant changes in the relationship between institutions and their publics, facilitating and enhancing the interaction between them. The overall objective of this paper is to analyze the degree of interactivity implemented in the websites of major international art museums, in order to assess if museums are evolving towards more dialogic systems with relation to their publics. The results indicate that museums still have a low level of interactivity on their websites, both in the tools used to present information and the resources available for interaction with virtual visitors. But it has also observed that museums are progressively implementing interactive and dialogic sources, suggesting a clear trend towards new ways of managing these platforms in order to establish more participatory and collaborative communication systems with virtual users.
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El estudio de la relación entre la RSC y el desempeño financiero (DEF) es complejo. En este sentido caben distintas hipótesis. En un extremo la hipótesis del impacto social (Freeman, 1984) defiende la existencia de un impacto positivo en la rentabilidad cuando se concilian los intereses y expectativas de la empresa y el conjunto de los grupos de interés. En el otro extremo, otros autores establecen una relación negativa entre la RSC y la rentabilidad (tradeoff hypothesis) mostrando que los costos asociados a la RSC exceden de los beneficios generados para la empresa (Friedman, 1962, 1970; Aupperle et al, 1985). En el medio algunos autores sostienen la existencia de mediadores o intangibles que explicarían los resultados a veces inconclusos y en definitiva sustentar una relación neutral entre ambas variables (Setó y Angla, 2011; Surroca, Tribó y Waddock, 2010; Gómez-García, 2008). Otros autores defienden la hipótesis de un círculo de valor virtuoso bidireccional o hipótesis de sinergia positiva entre la RSC y el DEF (McGuire et al, 1990; Waddock y Graves, 1997; Preston y ÓBannon, 1997; Orlitzky, et al., 2003, Orlitzky, 2005; Allouche y Laroche, 2005). De acuerdo a esta hipótesis, las compañías con resultados previos buenos liberan recursos para acometer actividades de RSC (hipótesis de la disponibilidad de recursos). Debido a ello, las investigaciones realizadas en los últimos años sobre el impacto de la RSC en el DEF arrojaron resultados inconclusos y conclusiones diferentes dependiendo de la industria, la dimensión estudiada de la RSC y del horizonte temporal considerado (Ortlitzky et al, 2003; Allouche y Laroche, 2005; Marom, 2006; Peloza, 2009; Martínez-Campillo et al 2013). En esta misma línea apuntan Godfrey y Hatch (2007) cuando señalaron la importancia de resolver estas tres cuestiones para poder comparar resultados...
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Dissertação de Mestrado apresentada ao Instituto Superior de Psicologia Aplicada para obtenção de grau de Mestre na especialidade de Psicologia Clínica.
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Researchers interested in the neurobiology of the acute stress response in humans require a valid and reliable acute stressor that can be used under experimental conditions. The Trier Social Stress Test (TSST) provides such a testing platform. It induces stress by requiring participants to make an interview-style presentation, followed by a surprise mental arithmetic test, in front of an interview panel who do not provide feedback or encouragement. In this review, we outline the methodology of the TSST, and discuss key findings under conditions of health and stress-related disorder. The TSST has unveiled differences in males and females, as well as different age groups, in their neurobiological response to acute stress. The TSST has also deepened our understanding of how genotype may moderate the cognitive neurobiology of acute stress, and exciting new inroads have been made in understanding epigenetic contributions to the biological regulation of the acute stress response using the TSST. A number of innovative adaptations have been developed which allow for the TSST to be used in group settings, with children, in combination with brain imaging, and with virtual committees. Future applications may incorporate the emerging links between the gut microbiome and the stress response. Future research should also maximise use of behavioural data generated by the TSST. Alternative acute stress paradigms may have utility over the TSST in certain situations, such as those that require repeat testing. Nonetheless, we expect that the TSST remains the gold standard for examining the cognitive neurobiology of acute stress in humans.
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As a relatively new phenomenon in 2009, Swedish nonprofit social service providers proposed quality improvement as a way to reduce mistakes, use resources more effectively and meet the needs and expectations of clients in a better way. Although similar experiences have been studied in health care, the transfer of quality improvement to nonprofit social services gives a possibility for more knowledge on what enables, and constrains, systematic quality improvement in this specific context. This thesis is based on five years of supporting quality improvement in the Swedish nonprofit welfare sector. Specifically, it builds knowledge on which active mechanisms and enabling or constraining structures exist for nonprofit social service quality improvement. By studying quality improvement projects that have been conducted in the development program Forum for Values, critical cases and broad overviews are found valuable. These cases have resulted in four papers on quality improvement in nonprofit social services. The papers include: critical cases from a nursing home for elderly and a daycare for disabled children (Paper I); a critical case from a sheltered housing (Paper II); an overview of performance measurements in 127 quality improvement projects (Paper III); and an analytical model of how improvement policy and practice are bridged by intermediaries (Paper IV). In this thesis, enabled or constrained events and activities related to Deming's system of profound knowledge are identified from the papers and elaborated upon. As a basis for transforming practice into continuous improvement, profound knowledge includes the four knowledge domains: appreciation of a system, theory of knowledge, understanding of variation and psychology of change. From a realist perspective, the identified events are seen as enabled or constrained by mechanisms and underlying regularities, or structures, in the context of nonprofit social services. The emerging mechanisms found in this thesis are: describing and reflecting upon project relations; forming and testing a theory of action; collecting and displaying measurable results over time; and engaging and participating in a development program. The structures that enable these mechanisms are: connecting projects to shared values such as client needs; local ownership of what should be measured; and translating quality improvement into a single practice. Constraining structures identified are: a lack of generalizable scientific knowledge and inappropriate or missing infrastructure for measurements. Reflecting upon the emergent structures of nonprofit social services, the role of political macro structures, reflective practice, competence in statistical methods and areas of expertise becomes important. From this discussion and the findings some hypotheses for future work can be formulated. First, the identified mechanisms and structures form a framework that helps explain why intended actions of quality improvement occur or not. This frameworkcan be part of formulating a program theory of quality improvement in nonprofit social services. With this theory, quality improvement can be evaluated, reflected upon and further developed in future interventions. Second,new quality improvement interventions can be reproduced more regularly by active work with known enablers and constraints from this program theory. This means that long-lasting interventions can be performed and studied in a second generation of improvement efforts. Third, if organizations integrate quality improvement as a part of their everyday practice they also develop context-specific knowledge about their services. This context-specific knowledge can be adopted and further developed through dedicated management and understanding of variation. Thus, if enabling structures are invoked and constraining structures handled, systematic quality improvement could be one way to integrate generalizable scientific knowledge as part of an evidence-creating practice.
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This study tests two general and independent hypotheses with the basic assumption that phytoactive secondary compounds produced by plants evolved primarily as plant defences against competitor plant species. The first hypothesis is that the production and main way of release of phytoactive compounds reflect an adaptive response to climatic conditions. Thus, higher phytoactivity by volatile compounds prevails in plants of hot, dry environments, whereas higher phytoactivity by water-soluble compounds is preponderant in plants from wetter environments. The second hypothesis is that synergy between plant phytoactive compounds is widespread, due to the resulting higher energy efficiency and economy of resources. The first hypothesis was tested on germination and early growth of cucumber treated with either water extracts or volatiles from leaves or vegetative shoot tops of four Mediterranean-type shrubs. The second hypothesis was tested on germination of subterranean clover treated with either water extracts of leaves or vegetative shoot tops of one tree and of three Mediterranean-type shrubs or with each of the three fractions obtained from water extracts. Our data do not support either hypotheses. We found no evidence for higher phytoactivity in volatile compounds released by plants that thrive in hot, dry Mediterranean-type environments. We also found no evidence for the predominance of synergy among the constituents of fractions. To the contrary, we found either antagonism or no interaction of effects among allelopathic compounds.
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Este estudo teve como finalidade investigar a relação entre alguns factores psicossociais e a adesão terapêutica, utilizando como variáveis preditoras, as representações de doença, a ansiedade e depressão as previsões de suporte social, e a espiritualidade e como variáveis de resultado, a adesão ao regime terapêutico, através da avaliação da adesão à medicação. Pretendeu-se testar quatro hipóteses: (1) Prevê-se que as representações de depressão nas suas dimensões da consequências, duração e controlo pessoal e de tratamento, identidade, preocupação, emoções e compreensão da doença sejam preditores significativos da adesão ao tratamento medicamentoso; (2) Prevê-se que os níveis de ansiedade e depressão dos doentes depressivos estarão significativa e negativamente correlacionados com os níveis de adesão ao tratamento medicamentoso; (3) Prevê-se que os níveis de suporte social percebido estarão significativa e positivamente correlacionados com os níveis de adesão ao tratamento medicamentoso e (4) Prevê-se que os níveis de espiritualidade se encontrem significativa e positivamente correlacionados com os níveis de adesão ao tratamento medicamentoso. Tratou-se de um estudo transversal, com desenho correlacionai e foi desenvolvido num Hospital da Região do Alentejo, mais especificamente, num Departamento de Psiquiatria a saúde Mental, com uma amostra não aleatória de 15 pacientes com o diagnóstico de Depressão. Os resultados confirmaram parcialmente a primeira hipótese, sendo as representações de doença, nas suas dimensões controlo pessoal, controlo do tratamento e emoções preditores significativos da adesão (mais especificamente das alterações das doses da medicação). A segunda hipótese também foi confirmada parcialmente, sendo a depressão preditora da adesão (tanto na dimensão do esquecimento, quanto na alteração das doses da medicação). A terceira hipótese foi, também, parcialmente confirmada sendo a aliança fiável preditora significativa da adesão (na dimensão do esquecimento da toma da medicação). Por último, a quarta hipótese foi igualmente confirmada parcialmente sendo a esperança/optimismo preditora significativa da adesão (tanto na dimensão do esquecimento, quanto na alteração das doses da medicação). Nas análises exploratórias verificou-se a influência da variável sócio demográfico “sexo” nas representações cognitivas e também na depressão. A "idade" também demonstrou algum efeito nas alterações à medicação e nas provisões sociais. O "estado civil" mostrou efeito no aconselhamento e na oportunidade de prestação de valores. As variáveis clínicas também mostraram ter influência. O "tempo de doença" mostrou efeito significativo nas representações emocionais, nas crenças, esperança/optimismo e no esquecimento da medicação. A "duração do tratamento com medicação" mostrou efeito na compreensão da doença e no esquecimento da medicação. Por fim, são apresentadas algumas implicações da depressão, bem como algumas sugestões para estudos futuros. /ABSTRACT: This study aimed to investigate the relationship between some psychosocial factors and the adherence, using as predictor variables, the representations of illness, the anxiety and depression, the social support predictions, and spirituality, and as outcome variables, adherence to treatment regimen, through the assessment of medication adherence. lt was intended to test four hypotheses: (1) lt is expected that the depression representations in its dimensions of consequences, duration and personal control and treatment, identity, concern, emotions and disease understanding are significant predictors of adherence to therapy; (2) lt is expected that anxiety and depression levels in depressed patients are significantly and negatively correlated with the levels of adherence to therapy; (3) lt is expected that the levels of perceived social support are significantly and positively correlated with the levels of adherence to drug treatment and (4) lt is expected that the levels of spirituality are significantly and positively correlated with levels of adherence to therapy. This was a cross-sectional study with correlational design and was developed in one Hospital of the Alentejo Region, more specifically, in a Department of Psychiatry and Mental Health, with a non¬random sample of 15 patients diagnosed with depression. The results partially confirmed the first hypothesis, being the representations of disease, in its dimensions of personal control, treatment control and emotions, significant predictors of adherence (more specifically, of the changes in the doses of medication). The second hypothesis was also partially confirmed, with depression being a predictor of adherence {both in the extent of oblivion and in the changes of medication doses). The third hypothesis was also partially confirmed, being the trustable alliance a quite significantly reliable predictor of adherence {in the dimension of the medication oblivion). Finally, the fourth hypothesis was equally partially confirmed, being the hope/optimism significant predictor of adherence (both in the extent of oblivion and in changing doses of medication). ln exploratory analyzes, it was verified the influence of socio-demographic variable "sex" in the cognitive representations and also in depression. The "age" also had some effect on changes to medication and social provisions. The "marital status" had effect in the counseling and in the opportunity to provide values. The clinical variables also proved to have influence. "Time sickness" had a significant effect on emotional representations, beliefs, hope/optimism and medication oblivion. The "treatment duration with medication" had effect in the disease understanding and the medication oblivion. Finally, are presented some implications of depression as well as some suggestions for future studies.
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Knowing when to compete and when to cooperate to maximize opportunities for equal access to activities and materials in groups is critical to children's social and cognitive development. The present study examined the individual (gender, social competence) and contextual factors (gender context) that may determine why some children are more successful than others. One hundred and fifty-six children (M age=6.5 years) were divided into 39 groups of four and videotaped while engaged in a task that required them to cooperate in order to view cartoons. Children within all groups were unfamiliar to one another. Groups varied in gender composition (all girls, all boys, or mixed-sex) and social competence (high vs. low). Group composition by gender interaction effects were found. Girls were most successful at gaining viewing time in same-sex groups, and least successful in mixed-sex groups. Conversely, boys were least successful in same-sex groups and most successful in mixed-sex groups. Similar results were also found at the group level of analysis; however, the way in which the resources were distributed differed as a function of group type. Same-sex girl groups were inequitable but efficient whereas same-sex boy groups were more equitable than mixed groups but inefficient compared to same-sex girl groups. Social competence did not influence children's behavior. The findings from the present study highlight the effect of gender context on cooperation and competition and the relevance of adopting an unfamiliar peer paradigm when investigating children's social behavior.